./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.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_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/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_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/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_54ca5a08-caa2-499c-8d92-fab952c7771a/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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:05:15,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:05:15,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:05:15,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:05:15,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:05:16,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:05:16,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:05:16,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:05:16,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:05:16,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:05:16,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:05:16,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:05:16,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:05:16,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:05:16,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:05:16,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:05:16,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:05:16,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:05:16,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:05:16,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:05:16,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:05:16,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:05:16,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:05:16,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:05:16,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:05:16,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:05:16,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:05:16,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:05:16,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:05:16,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:05:16,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:05:16,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:05:16,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:05:16,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:05:16,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:05:16,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:05:16,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:05:16,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:05:16,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:05:16,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:05:16,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:05:16,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:05:16,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:05:16,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:05:16,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:05:16,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:05:16,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:05:16,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:05:16,150 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:05:16,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:05:16,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:05:16,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:05:16,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:05:16,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:05:16,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:05:16,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:05:16,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:05:16,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:05:16,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:05:16,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:05:16,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:05:16,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:05:16,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:05:16,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:05:16,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:16,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:05:16,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:05:16,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:05:16,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:05:16,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:05:16,156 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:05:16,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:05:16,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:05:16,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:05:16,157 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_54ca5a08-caa2-499c-8d92-fab952c7771a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2021-11-02 23:05:16,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:05:16,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:05:16,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:05:16,471 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:05:16,472 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:05:16,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-11-02 23:05:16,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/data/cbaaef965/3767809abe0f44c6895c7c9ed28a3634/FLAG738fc9efe [2021-11-02 23:05:17,053 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:05:17,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-11-02 23:05:17,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/data/cbaaef965/3767809abe0f44c6895c7c9ed28a3634/FLAG738fc9efe [2021-11-02 23:05:17,474 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/data/cbaaef965/3767809abe0f44c6895c7c9ed28a3634 [2021-11-02 23:05:17,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:05:17,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:05:17,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:17,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:05:17,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:05:17,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c76ef79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17, skipping insertion in model container [2021-11-02 23:05:17,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:05:17,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:05:17,720 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_54ca5a08-caa2-499c-8d92-fab952c7771a/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-11-02 23:05:17,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:17,735 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:05:17,747 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_54ca5a08-caa2-499c-8d92-fab952c7771a/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-11-02 23:05:17,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:17,759 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:05:17,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17 WrapperNode [2021-11-02 23:05:17,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:17,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:05:17,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:05:17,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:05:17,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:05:17,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:05:17,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:05:17,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:05:17,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:05:17,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:05:17,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:05:17,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:05:17,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (1/1) ... [2021-11-02 23:05:17,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:17,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:05:17,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:05:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-02 23:05:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-02 23:05:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:05:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:05:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-02 23:05:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-02 23:05:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:05:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:05:18,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:05:18,147 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 23:05:18,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:18 BoogieIcfgContainer [2021-11-02 23:05:18,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:05:18,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:05:18,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:05:18,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:05:18,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:05:17" (1/3) ... [2021-11-02 23:05:18,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f552d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:18, skipping insertion in model container [2021-11-02 23:05:18,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:17" (2/3) ... [2021-11-02 23:05:18,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f552d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:18, skipping insertion in model container [2021-11-02 23:05:18,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:18" (3/3) ... [2021-11-02 23:05:18,168 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2021-11-02 23:05:18,174 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:05:18,174 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:05:18,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:05:18,256 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 23:05:18,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:05:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:05:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:05:18,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:18,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:18,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2021-11-02 23:05:18,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:18,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096073253] [2021-11-02 23:05:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:18,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:18,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,020 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 23:05:19,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:19,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096073253] [2021-11-02 23:05:19,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096073253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:19,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:05:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392299876] [2021-11-02 23:05:19,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:05:19,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:05:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:05:19,050 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:19,180 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-02 23:05:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:05:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-02 23:05:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:19,192 INFO L225 Difference]: With dead ends: 37 [2021-11-02 23:05:19,192 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 23:05:19,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:05:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 23:05:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 23:05:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 23:05:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-02 23:05:19,268 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2021-11-02 23:05:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:19,278 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-02 23:05:19,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-02 23:05:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:05:19,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:19,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:19,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:05:19,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2021-11-02 23:05:19,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:19,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724056670] [2021-11-02 23:05:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:19,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,684 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 23:05:19,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:19,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724056670] [2021-11-02 23:05:19,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724056670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:19,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:19,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:05:19,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587637630] [2021-11-02 23:05:19,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:05:19,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:19,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:05:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:05:19,692 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:19,792 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-02 23:05:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:05:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-02 23:05:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:19,795 INFO L225 Difference]: With dead ends: 30 [2021-11-02 23:05:19,795 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:05:19,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:05:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:05:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-02 23:05:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 23:05:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-02 23:05:19,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-11-02 23:05:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:19,808 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-02 23:05:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-02 23:05:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:05:19,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:19,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:19,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:05:19,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:19,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2021-11-02 23:05:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:19,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913149848] [2021-11-02 23:05:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:19,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,933 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 23:05:19,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:19,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913149848] [2021-11-02 23:05:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913149848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:19,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:19,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:05:19,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515433604] [2021-11-02 23:05:19,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:05:19,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:19,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:05:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:05:19,939 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:19,975 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-02 23:05:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:05:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-02 23:05:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:19,977 INFO L225 Difference]: With dead ends: 38 [2021-11-02 23:05:19,977 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:05:19,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:05:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:05:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-02 23:05:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 23:05:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-02 23:05:19,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2021-11-02 23:05:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:19,986 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-02 23:05:19,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-02 23:05:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:05:19,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:19,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:19,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:05:19,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2021-11-02 23:05:19,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:19,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217642474] [2021-11-02 23:05:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:19,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,266 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 23:05:20,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:20,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217642474] [2021-11-02 23:05:20,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217642474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:20,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:20,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 23:05:20,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032695341] [2021-11-02 23:05:20,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:05:20,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:05:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:05:20,274 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:20,442 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-11-02 23:05:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:05:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-02 23:05:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:20,444 INFO L225 Difference]: With dead ends: 33 [2021-11-02 23:05:20,445 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 23:05:20,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:05:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 23:05:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-02 23:05:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 23:05:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-02 23:05:20,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-11-02 23:05:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:20,451 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-02 23:05:20,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 23:05:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-02 23:05:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:05:20,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:20,454 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:05:20,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2021-11-02 23:05:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:20,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094715751] [2021-11-02 23:05:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:20,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:05:20,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:20,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094715751] [2021-11-02 23:05:20,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094715751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:20,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:20,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:05:20,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503825365] [2021-11-02 23:05:20,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:05:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:05:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:05:20,590 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:05:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:20,628 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-11-02 23:05:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:05:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-02 23:05:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:20,630 INFO L225 Difference]: With dead ends: 39 [2021-11-02 23:05:20,631 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:05:20,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:05:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:05:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 23:05:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 23:05:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-02 23:05:20,636 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-11-02 23:05:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:20,637 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-02 23:05:20,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 23:05:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-02 23:05:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:05:20,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:20,639 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:05:20,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2021-11-02 23:05:20,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:20,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198682704] [2021-11-02 23:05:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:20,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:05:21,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:21,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198682704] [2021-11-02 23:05:21,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198682704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:21,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351538965] [2021-11-02 23:05:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:21,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:21,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:21,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:05:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:05:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:05:21,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351538965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:21,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:21,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-11-02 23:05:21,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496946811] [2021-11-02 23:05:21,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:05:21,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:05:21,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:05:21,553 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 23:05:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:21,743 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-11-02 23:05:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:05:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-02 23:05:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:21,745 INFO L225 Difference]: With dead ends: 39 [2021-11-02 23:05:21,745 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 23:05:21,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:05:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 23:05:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-02 23:05:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 23:05:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-02 23:05:21,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2021-11-02 23:05:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:21,757 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-02 23:05:21,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 23:05:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-02 23:05:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:05:21,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:21,759 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:21,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:21,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:21,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2021-11-02 23:05:21,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:21,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389045533] [2021-11-02 23:05:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:21,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:05:22,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:22,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389045533] [2021-11-02 23:05:22,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389045533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:22,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646913587] [2021-11-02 23:05:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:22,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:22,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:22,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:05:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:05:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:05:22,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646913587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:22,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-11-02 23:05:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054867050] [2021-11-02 23:05:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:05:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:05:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:05:22,800 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-02 23:05:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:23,200 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-11-02 23:05:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:05:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2021-11-02 23:05:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:23,201 INFO L225 Difference]: With dead ends: 45 [2021-11-02 23:05:23,201 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 23:05:23,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:05:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 23:05:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-02 23:05:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-02 23:05:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-02 23:05:23,213 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2021-11-02 23:05:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-02 23:05:23,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-02 23:05:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-02 23:05:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:05:23,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:23,219 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:23,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:23,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2021-11-02 23:05:23,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:23,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402634019] [2021-11-02 23:05:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:23,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 23:05:23,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:23,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402634019] [2021-11-02 23:05:23,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402634019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:23,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322499306] [2021-11-02 23:05:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:23,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:23,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:23,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:05:23,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:05:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 23:05:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322499306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:24,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:24,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-11-02 23:05:24,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653318326] [2021-11-02 23:05:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:05:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:05:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:05:24,343 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 23:05:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:24,722 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-02 23:05:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:05:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-11-02 23:05:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:24,724 INFO L225 Difference]: With dead ends: 51 [2021-11-02 23:05:24,724 INFO L226 Difference]: Without dead ends: 47 [2021-11-02 23:05:24,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:05:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-02 23:05:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-11-02 23:05:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-02 23:05:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-02 23:05:24,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2021-11-02 23:05:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:24,732 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-02 23:05:24,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 23:05:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-02 23:05:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:05:24,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:24,734 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:24,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:24,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:05:24,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2021-11-02 23:05:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:24,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329653495] [2021-11-02 23:05:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:24,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:05:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:25,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329653495] [2021-11-02 23:05:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329653495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:25,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808264322] [2021-11-02 23:05:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:25,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:25,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:25,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:25,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:05:25,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:05:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:05:25,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808264322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:25,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:25,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-11-02 23:05:25,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887373209] [2021-11-02 23:05:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:05:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:05:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:05:25,987 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-02 23:05:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:26,499 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-02 23:05:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:05:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 47 [2021-11-02 23:05:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:26,501 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:05:26,501 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 23:05:26,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1755, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:05:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 23:05:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-11-02 23:05:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-02 23:05:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-02 23:05:26,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2021-11-02 23:05:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:26,510 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-02 23:05:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-02 23:05:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-02 23:05:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:05:26,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:26,512 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:26,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:26,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:26,732 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2021-11-02 23:05:26,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:26,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81479102] [2021-11-02 23:05:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:26,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:27,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 23:05:27,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:27,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81479102] [2021-11-02 23:05:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81479102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:27,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193722907] [2021-11-02 23:05:27,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:27,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:27,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:27,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:27,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:05:27,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:05:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:05:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 23:05:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193722907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:27,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:27,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-11-02 23:05:27,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458417870] [2021-11-02 23:05:27,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:05:27,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:05:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:05:27,863 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-02 23:05:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:28,341 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-11-02 23:05:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:05:28,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-11-02 23:05:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:28,346 INFO L225 Difference]: With dead ends: 63 [2021-11-02 23:05:28,346 INFO L226 Difference]: Without dead ends: 59 [2021-11-02 23:05:28,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:05:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-02 23:05:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2021-11-02 23:05:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-02 23:05:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-02 23:05:28,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2021-11-02 23:05:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:28,364 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-02 23:05:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-02 23:05:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-02 23:05:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:05:28,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:28,370 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:28,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:28,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:05:28,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2021-11-02 23:05:28,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:28,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523634537] [2021-11-02 23:05:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:28,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:29,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:29,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 23:05:29,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:29,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523634537] [2021-11-02 23:05:29,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523634537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:29,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609375364] [2021-11-02 23:05:29,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:29,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:29,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:29,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:05:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:05:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 23:05:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 23:05:30,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609375364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:30,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:30,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2021-11-02 23:05:30,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439032317] [2021-11-02 23:05:30,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:05:30,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:05:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:05:30,126 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-02 23:05:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:30,869 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-02 23:05:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:05:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) Word has length 61 [2021-11-02 23:05:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:30,871 INFO L225 Difference]: With dead ends: 69 [2021-11-02 23:05:30,871 INFO L226 Difference]: Without dead ends: 65 [2021-11-02 23:05:30,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=2903, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:05:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-02 23:05:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-11-02 23:05:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-02 23:05:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-02 23:05:30,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2021-11-02 23:05:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:30,881 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-02 23:05:30,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 16 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-02 23:05:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-02 23:05:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:05:30,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:30,883 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:31,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:05:31,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2021-11-02 23:05:31,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:31,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940410669] [2021-11-02 23:05:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:31,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-02 23:05:31,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:31,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940410669] [2021-11-02 23:05:31,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940410669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:31,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713738928] [2021-11-02 23:05:31,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:31,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:31,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:31,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:05:31,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-02 23:05:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-02 23:05:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713738928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:32,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:32,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-11-02 23:05:32,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18875500] [2021-11-02 23:05:32,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:32,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:32,593 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 27 states, 25 states have (on average 1.32) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 9 states have return successors, (10), 10 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-02 23:05:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:33,180 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-02 23:05:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:05:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.32) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 9 states have return successors, (10), 10 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-11-02 23:05:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:33,182 INFO L225 Difference]: With dead ends: 75 [2021-11-02 23:05:33,182 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:05:33,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:05:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:05:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-11-02 23:05:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-02 23:05:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-02 23:05:33,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2021-11-02 23:05:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:33,191 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-02 23:05:33,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.32) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 9 states have return successors, (10), 10 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-02 23:05:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-02 23:05:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:05:33,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:33,193 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:33,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:33,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:33,419 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2021-11-02 23:05:33,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:33,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694384383] [2021-11-02 23:05:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:33,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:34,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:05:34,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:34,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694384383] [2021-11-02 23:05:34,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694384383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:34,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514719647] [2021-11-02 23:05:34,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:34,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:34,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:34,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:05:34,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:34,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-02 23:05:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:05:34,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514719647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:34,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:34,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 28 [2021-11-02 23:05:34,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645720615] [2021-11-02 23:05:34,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:05:34,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:05:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:05:34,966 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 10 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-02 23:05:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:35,711 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-11-02 23:05:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:05:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 10 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2021-11-02 23:05:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:35,712 INFO L225 Difference]: With dead ends: 81 [2021-11-02 23:05:35,712 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:05:35,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:05:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:05:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-11-02 23:05:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-02 23:05:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-02 23:05:35,721 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2021-11-02 23:05:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-02 23:05:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 10 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-02 23:05:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-02 23:05:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:05:35,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:35,723 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:35,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:35,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:35,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:35,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2021-11-02 23:05:35,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:35,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776359842] [2021-11-02 23:05:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:35,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:05:36,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776359842] [2021-11-02 23:05:36,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776359842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258477783] [2021-11-02 23:05:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:36,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:36,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:36,784 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:36,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:05:37,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:05:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-02 23:05:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:05:37,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258477783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:37,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:37,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-11-02 23:05:37,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405349367] [2021-11-02 23:05:37,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:05:37,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:05:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:05:37,859 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 11 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-02 23:05:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:38,671 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-11-02 23:05:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:05:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 11 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 82 [2021-11-02 23:05:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:38,673 INFO L225 Difference]: With dead ends: 87 [2021-11-02 23:05:38,673 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 23:05:38,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=2600, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:05:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 23:05:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-11-02 23:05:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-02 23:05:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-02 23:05:38,682 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2021-11-02 23:05:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-02 23:05:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 11 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-02 23:05:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-02 23:05:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:05:38,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:38,685 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:38,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:38,900 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2021-11-02 23:05:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490004226] [2021-11-02 23:05:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:38,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 23:05:39,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:39,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490004226] [2021-11-02 23:05:39,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490004226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:39,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267383741] [2021-11-02 23:05:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:39,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:39,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:05:40,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:05:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 23:05:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 23:05:40,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267383741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:40,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:40,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 32 [2021-11-02 23:05:40,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73832011] [2021-11-02 23:05:40,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:05:40,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:05:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:05:40,754 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-02 23:05:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:41,680 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-11-02 23:05:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:05:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-11-02 23:05:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:41,681 INFO L225 Difference]: With dead ends: 93 [2021-11-02 23:05:41,681 INFO L226 Difference]: Without dead ends: 89 [2021-11-02 23:05:41,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:05:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-02 23:05:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-11-02 23:05:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-02 23:05:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-02 23:05:41,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2021-11-02 23:05:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:41,692 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-02 23:05:41,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-02 23:05:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-02 23:05:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:05:41,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:41,694 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:41,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:41,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:05:41,900 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2021-11-02 23:05:41,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:41,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956615927] [2021-11-02 23:05:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:41,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-02 23:05:42,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:42,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956615927] [2021-11-02 23:05:42,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956615927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:42,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651213828] [2021-11-02 23:05:42,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:42,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:42,915 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:42,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:05:43,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:05:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-02 23:05:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-02 23:05:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651213828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:44,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:44,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2021-11-02 23:05:44,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523297527] [2021-11-02 23:05:44,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:05:44,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:44,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:05:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:05:44,145 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 13 states have return successors, (14), 14 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-02 23:05:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:45,125 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-11-02 23:05:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:05:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 13 states have return successors, (14), 14 states have call predecessors, (14), 4 states have call successors, (14) Word has length 96 [2021-11-02 23:05:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:45,127 INFO L225 Difference]: With dead ends: 99 [2021-11-02 23:05:45,127 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:05:45,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=3480, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:05:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:05:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-11-02 23:05:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-02 23:05:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-02 23:05:45,134 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2021-11-02 23:05:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:45,135 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-02 23:05:45,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 13 states have return successors, (14), 14 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-02 23:05:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-02 23:05:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 23:05:45,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:45,136 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:45,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:45,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:05:45,337 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:45,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2021-11-02 23:05:45,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:45,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530960358] [2021-11-02 23:05:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:45,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:05:46,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:46,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530960358] [2021-11-02 23:05:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530960358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:46,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711898528] [2021-11-02 23:05:46,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:46,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:46,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:46,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:05:46,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:05:46,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 23:05:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:05:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711898528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:48,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:48,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 63 [2021-11-02 23:05:48,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013712064] [2021-11-02 23:05:48,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:05:48,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:05:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:05:48,338 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 28 states have return successors, (28), 28 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-02 23:05:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:50,206 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-11-02 23:05:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:05:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 28 states have return successors, (28), 28 states have call predecessors, (28), 3 states have call successors, (28) Word has length 103 [2021-11-02 23:05:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:50,210 INFO L225 Difference]: With dead ends: 105 [2021-11-02 23:05:50,210 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:05:50,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=297, Invalid=8075, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:05:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:05:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-11-02 23:05:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-02 23:05:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-11-02 23:05:50,227 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2021-11-02 23:05:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:50,227 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-11-02 23:05:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 28 states have return successors, (28), 28 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-02 23:05:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-11-02 23:05:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 23:05:50,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:50,233 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:50,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:50,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:05:50,448 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2021-11-02 23:05:50,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:50,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336224484] [2021-11-02 23:05:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:50,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-02 23:05:51,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:51,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336224484] [2021-11-02 23:05:51,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336224484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:51,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536072078] [2021-11-02 23:05:51,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:51,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:51,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:51,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:05:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-02 23:05:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-02 23:05:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536072078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:53,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:53,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2021-11-02 23:05:53,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253148459] [2021-11-02 23:05:53,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:05:53,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:05:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:05:53,151 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 15 states have return successors, (16), 16 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-02 23:05:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:54,289 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-02 23:05:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:05:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 15 states have return successors, (16), 16 states have call predecessors, (16), 4 states have call successors, (16) Word has length 110 [2021-11-02 23:05:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:54,291 INFO L225 Difference]: With dead ends: 111 [2021-11-02 23:05:54,291 INFO L226 Difference]: Without dead ends: 107 [2021-11-02 23:05:54,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=4488, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:05:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-02 23:05:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2021-11-02 23:05:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-02 23:05:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-02 23:05:54,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2021-11-02 23:05:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:54,299 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-02 23:05:54,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 15 states have return successors, (16), 16 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-02 23:05:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-02 23:05:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-02 23:05:54,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:54,301 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:54,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-02 23:05:54,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:05:54,516 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2021-11-02 23:05:54,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:54,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372123365] [2021-11-02 23:05:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:54,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:05:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-02 23:05:55,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:55,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372123365] [2021-11-02 23:05:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372123365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:55,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095192846] [2021-11-02 23:05:55,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:55,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:55,887 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:05:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 23:05:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-02 23:05:58,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095192846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:58,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:58,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72 [2021-11-02 23:05:58,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280603335] [2021-11-02 23:05:58,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-02 23:05:58,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-02 23:05:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:05:58,472 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 72 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 32 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-02 23:06:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:00,348 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-11-02 23:06:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:06:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 32 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) Word has length 117 [2021-11-02 23:06:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:00,350 INFO L225 Difference]: With dead ends: 117 [2021-11-02 23:06:00,350 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:06:00,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=343, Invalid=10577, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:06:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:06:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2021-11-02 23:06:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-02 23:06:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-02 23:06:00,358 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2021-11-02 23:06:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-02 23:06:00,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 32 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-02 23:06:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-02 23:06:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 23:06:00,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:00,361 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:00,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:00,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:00,576 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2021-11-02 23:06:00,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:00,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408940297] [2021-11-02 23:06:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:00,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:00,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 23:06:02,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:02,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408940297] [2021-11-02 23:06:02,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408940297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:02,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636953074] [2021-11-02 23:06:02,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:02,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:02,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:02,011 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:06:02,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-02 23:06:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 23:06:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636953074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:03,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:03,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2021-11-02 23:06:03,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397896148] [2021-11-02 23:06:03,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:06:03,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:06:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:06:03,441 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 43 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 17 states have return successors, (18), 18 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-02 23:06:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:04,902 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-11-02 23:06:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:06:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 17 states have return successors, (18), 18 states have call predecessors, (18), 4 states have call successors, (18) Word has length 124 [2021-11-02 23:06:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:04,904 INFO L225 Difference]: With dead ends: 123 [2021-11-02 23:06:04,904 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 23:06:04,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:06:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 23:06:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2021-11-02 23:06:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-02 23:06:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-02 23:06:04,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2021-11-02 23:06:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:04,912 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-02 23:06:04,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 25 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 17 states have return successors, (18), 18 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-02 23:06:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-02 23:06:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 23:06:04,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:04,914 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:04,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:05,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:05,140 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2021-11-02 23:06:05,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:05,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144984701] [2021-11-02 23:06:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:05,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-02 23:06:06,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144984701] [2021-11-02 23:06:06,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144984701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420829438] [2021-11-02 23:06:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:06,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:06,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:06,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:06:07,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:07,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-02 23:06:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-02 23:06:09,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420829438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:09,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:09,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 79 [2021-11-02 23:06:09,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790571575] [2021-11-02 23:06:09,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-02 23:06:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-02 23:06:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:06:09,467 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 43 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-02 23:06:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:11,847 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-11-02 23:06:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:06:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 43 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) Word has length 131 [2021-11-02 23:06:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:11,849 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:06:11,849 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 23:06:11,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=377, Invalid=12963, Unknown=0, NotChecked=0, Total=13340 [2021-11-02 23:06:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 23:06:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-11-02 23:06:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-02 23:06:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-11-02 23:06:11,856 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2021-11-02 23:06:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-11-02 23:06:11,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 43 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-02 23:06:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-11-02 23:06:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-02 23:06:11,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:11,858 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:11,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:12,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:12,083 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2021-11-02 23:06:12,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:12,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119105469] [2021-11-02 23:06:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:12,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-02 23:06:13,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:13,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119105469] [2021-11-02 23:06:13,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119105469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:13,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064197459] [2021-11-02 23:06:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:06:13,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:13,767 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:13,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:06:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:06:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-02 23:06:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-02 23:06:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064197459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:15,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:15,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2021-11-02 23:06:15,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028537439] [2021-11-02 23:06:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:06:15,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:06:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:06:15,471 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 47 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-02 23:06:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:17,275 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-11-02 23:06:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:06:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) Word has length 138 [2021-11-02 23:06:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:17,279 INFO L225 Difference]: With dead ends: 135 [2021-11-02 23:06:17,279 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 23:06:17,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:06:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 23:06:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2021-11-02 23:06:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-02 23:06:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-02 23:06:17,286 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2021-11-02 23:06:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:17,286 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-02 23:06:17,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-02 23:06:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-02 23:06:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-02 23:06:17,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:17,288 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:17,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:17,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:06:17,500 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2021-11-02 23:06:17,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:17,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772170405] [2021-11-02 23:06:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:17,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:17,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:18,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-02 23:06:19,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772170405] [2021-11-02 23:06:19,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772170405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136941104] [2021-11-02 23:06:19,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:06:19,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:19,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:06:20,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:06:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-02 23:06:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-02 23:06:22,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136941104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:22,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:22,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 87 [2021-11-02 23:06:22,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966678896] [2021-11-02 23:06:22,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-02 23:06:22,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-02 23:06:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:06:22,585 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 47 states have internal predecessors, (95), 4 states have call successors, (4), 1 states have call predecessors, (4), 40 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-02 23:06:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:25,491 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-11-02 23:06:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:06:25,492 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 47 states have internal predecessors, (95), 4 states have call successors, (4), 1 states have call predecessors, (4), 40 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) Word has length 145 [2021-11-02 23:06:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:25,493 INFO L225 Difference]: With dead ends: 141 [2021-11-02 23:06:25,493 INFO L226 Difference]: Without dead ends: 137 [2021-11-02 23:06:25,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=417, Invalid=15839, Unknown=0, NotChecked=0, Total=16256 [2021-11-02 23:06:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-02 23:06:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2021-11-02 23:06:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-02 23:06:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-11-02 23:06:25,500 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2021-11-02 23:06:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:25,501 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-11-02 23:06:25,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 47 states have internal predecessors, (95), 4 states have call successors, (4), 1 states have call predecessors, (4), 40 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-02 23:06:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-11-02 23:06:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:06:25,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:25,502 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:25,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:25,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:06:25,716 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2021-11-02 23:06:25,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:25,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614466831] [2021-11-02 23:06:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:25,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:25,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-02 23:06:27,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:27,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614466831] [2021-11-02 23:06:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614466831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:27,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927202495] [2021-11-02 23:06:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:27,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:27,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:27,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:06:28,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:28,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-02 23:06:28,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-02 23:06:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927202495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:29,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:29,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2021-11-02 23:06:29,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107384385] [2021-11-02 23:06:29,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:06:29,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:06:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:06:29,878 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 51 states, 49 states have (on average 1.163265306122449) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 21 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-02 23:06:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:31,840 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2021-11-02 23:06:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:06:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.163265306122449) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 21 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) Word has length 152 [2021-11-02 23:06:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:31,842 INFO L225 Difference]: With dead ends: 147 [2021-11-02 23:06:31,842 INFO L226 Difference]: Without dead ends: 143 [2021-11-02 23:06:31,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=276, Invalid=8280, Unknown=0, NotChecked=0, Total=8556 [2021-11-02 23:06:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-02 23:06:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2021-11-02 23:06:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-02 23:06:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-11-02 23:06:31,849 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2021-11-02 23:06:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:31,849 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-11-02 23:06:31,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.163265306122449) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 21 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-02 23:06:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-11-02 23:06:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-02 23:06:31,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:31,851 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:31,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-02 23:06:32,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:06:32,068 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2021-11-02 23:06:32,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:32,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240181915] [2021-11-02 23:06:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:32,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:34,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-02 23:06:34,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:34,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240181915] [2021-11-02 23:06:34,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240181915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:34,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383412190] [2021-11-02 23:06:34,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:34,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:34,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:34,134 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:06:35,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:35,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 184 conjunts are in the unsatisfiable core [2021-11-02 23:06:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-02 23:06:36,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383412190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:36,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:36,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2021-11-02 23:06:36,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707008732] [2021-11-02 23:06:36,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:06:36,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:06:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:06:36,081 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-02 23:06:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:38,309 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2021-11-02 23:06:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:06:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) Word has length 159 [2021-11-02 23:06:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:38,311 INFO L225 Difference]: With dead ends: 153 [2021-11-02 23:06:38,311 INFO L226 Difference]: Without dead ends: 149 [2021-11-02 23:06:38,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:06:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-02 23:06:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2021-11-02 23:06:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-02 23:06:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-11-02 23:06:38,319 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2021-11-02 23:06:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-11-02 23:06:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-02 23:06:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-11-02 23:06:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:06:38,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:38,322 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:38,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:38,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:06:38,540 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2021-11-02 23:06:38,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:38,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050850469] [2021-11-02 23:06:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:38,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:38,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-02 23:06:40,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:40,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050850469] [2021-11-02 23:06:40,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050850469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:40,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378547390] [2021-11-02 23:06:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:06:40,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:40,851 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:40,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:06:41,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:06:41,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-02 23:06:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-02 23:06:43,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378547390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:43,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:43,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2021-11-02 23:06:43,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096467682] [2021-11-02 23:06:43,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 23:06:43,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 23:06:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:06:43,080 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 55 states, 53 states have (on average 1.150943396226415) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-02 23:06:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:45,499 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2021-11-02 23:06:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:06:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.150943396226415) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) Word has length 166 [2021-11-02 23:06:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:45,503 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:06:45,503 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 23:06:45,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=300, Invalid=9800, Unknown=0, NotChecked=0, Total=10100 [2021-11-02 23:06:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 23:06:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2021-11-02 23:06:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-02 23:06:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-02 23:06:45,511 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2021-11-02 23:06:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:45,512 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-02 23:06:45,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.150943396226415) internal successors, (61), 31 states have internal predecessors, (61), 4 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-02 23:06:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-02 23:06:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 23:06:45,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:45,514 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:45,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:45,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:06:45,724 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2021-11-02 23:06:45,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:45,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004461293] [2021-11-02 23:06:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:45,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:45,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:45,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:45,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-11-02 23:06:47,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:47,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004461293] [2021-11-02 23:06:47,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004461293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:47,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606850150] [2021-11-02 23:06:47,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:06:47,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:47,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:47,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:06:49,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:06:49,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-02 23:06:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-11-02 23:06:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606850150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:50,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:50,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54] total 56 [2021-11-02 23:06:50,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382809479] [2021-11-02 23:06:50,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:06:50,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:06:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2968, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:06:50,301 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-02 23:06:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:52,911 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2021-11-02 23:06:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:06:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 4 states have call successors, (25) Word has length 173 [2021-11-02 23:06:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:52,913 INFO L225 Difference]: With dead ends: 165 [2021-11-02 23:06:52,913 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:06:52,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2021-11-02 23:06:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:06:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2021-11-02 23:06:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-02 23:06:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-11-02 23:06:52,919 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2021-11-02 23:06:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:52,920 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-11-02 23:06:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-02 23:06:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-11-02 23:06:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-02 23:06:52,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:52,922 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:52,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:53,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:53,140 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2021-11-02 23:06:53,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:53,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280738636] [2021-11-02 23:06:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:53,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:54,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:06:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-02 23:06:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:55,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280738636] [2021-11-02 23:06:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280738636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:55,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408033067] [2021-11-02 23:06:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:06:55,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:55,503 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:55,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:06:56,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:06:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 208 conjunts are in the unsatisfiable core [2021-11-02 23:06:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-02 23:06:58,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408033067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:58,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2021-11-02 23:06:58,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711824138] [2021-11-02 23:06:58,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:06:58,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:58,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:06:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:06:58,023 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 59 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 33 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 25 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-02 23:07:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:00,777 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-11-02 23:07:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 23:07:00,778 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 33 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 25 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) Word has length 180 [2021-11-02 23:07:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:00,779 INFO L225 Difference]: With dead ends: 171 [2021-11-02 23:07:00,779 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 23:07:00,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=324, Invalid=11448, Unknown=0, NotChecked=0, Total=11772 [2021-11-02 23:07:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 23:07:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2021-11-02 23:07:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-02 23:07:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-02 23:07:00,787 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2021-11-02 23:07:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:00,787 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-02 23:07:00,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 33 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 25 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-02 23:07:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-02 23:07:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-02 23:07:00,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:00,789 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:00,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 23:07:01,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:01,010 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2021-11-02 23:07:01,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:01,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209695966] [2021-11-02 23:07:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:01,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:03,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:03,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:03,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-02 23:07:03,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:03,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209695966] [2021-11-02 23:07:03,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209695966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:03,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735404186] [2021-11-02 23:07:03,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:03,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:03,441 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:03,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:07:04,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:07:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 164 conjunts are in the unsatisfiable core [2021-11-02 23:07:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-02 23:07:08,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735404186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:08,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:08,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 111 [2021-11-02 23:07:08,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057126386] [2021-11-02 23:07:08,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-02 23:07:08,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-02 23:07:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=11938, Unknown=0, NotChecked=0, Total=12210 [2021-11-02 23:07:08,806 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 59 states have internal predecessors, (119), 4 states have call successors, (4), 1 states have call predecessors, (4), 52 states have return successors, (52), 52 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-02 23:07:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:14,065 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-11-02 23:07:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:07:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 59 states have internal predecessors, (119), 4 states have call successors, (4), 1 states have call predecessors, (4), 52 states have return successors, (52), 52 states have call predecessors, (52), 4 states have call successors, (52) Word has length 187 [2021-11-02 23:07:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:14,069 INFO L225 Difference]: With dead ends: 177 [2021-11-02 23:07:14,069 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 23:07:14,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=537, Invalid=26195, Unknown=0, NotChecked=0, Total=26732 [2021-11-02 23:07:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 23:07:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2021-11-02 23:07:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 28 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-02 23:07:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-11-02 23:07:14,080 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2021-11-02 23:07:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-11-02 23:07:14,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 59 states have internal predecessors, (119), 4 states have call successors, (4), 1 states have call predecessors, (4), 52 states have return successors, (52), 52 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-02 23:07:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-11-02 23:07:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-02 23:07:14,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:14,083 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:14,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:14,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:07:14,292 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2021-11-02 23:07:14,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:14,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672735232] [2021-11-02 23:07:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:14,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:14,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:16,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:17,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-02 23:07:17,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:17,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672735232] [2021-11-02 23:07:17,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672735232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:17,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17341071] [2021-11-02 23:07:17,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:17,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:17,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:17,152 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:17,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:07:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 224 conjunts are in the unsatisfiable core [2021-11-02 23:07:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-02 23:07:20,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17341071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:20,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:20,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2021-11-02 23:07:20,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664613523] [2021-11-02 23:07:20,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:07:20,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:07:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:07:20,013 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 63 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 35 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-02 23:07:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:23,436 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2021-11-02 23:07:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:07:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 35 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) Word has length 194 [2021-11-02 23:07:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:23,450 INFO L225 Difference]: With dead ends: 183 [2021-11-02 23:07:23,451 INFO L226 Difference]: Without dead ends: 179 [2021-11-02 23:07:23,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=348, Invalid=13224, Unknown=0, NotChecked=0, Total=13572 [2021-11-02 23:07:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-02 23:07:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2021-11-02 23:07:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 29 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-02 23:07:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-11-02 23:07:23,460 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 194 [2021-11-02 23:07:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:23,461 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-11-02 23:07:23,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 35 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-02 23:07:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-11-02 23:07:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-02 23:07:23,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:23,463 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:23,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:23,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:23,688 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1458999816, now seen corresponding path program 13 times [2021-11-02 23:07:23,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:23,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326898700] [2021-11-02 23:07:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:23,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:23,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-02 23:07:26,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326898700] [2021-11-02 23:07:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326898700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:26,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268323408] [2021-11-02 23:07:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:26,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:26,567 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:07:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-02 23:07:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-02 23:07:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268323408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:32,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:32,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62] total 119 [2021-11-02 23:07:32,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014429310] [2021-11-02 23:07:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-02 23:07:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-02 23:07:32,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=13750, Unknown=0, NotChecked=0, Total=14042 [2021-11-02 23:07:32,688 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 119 states, 118 states have (on average 1.076271186440678) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 56 states have return successors, (56), 56 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-02 23:07:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:38,261 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2021-11-02 23:07:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 23:07:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 1.076271186440678) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 56 states have return successors, (56), 56 states have call predecessors, (56), 4 states have call successors, (56) Word has length 201 [2021-11-02 23:07:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:38,264 INFO L225 Difference]: With dead ends: 189 [2021-11-02 23:07:38,264 INFO L226 Difference]: Without dead ends: 185 [2021-11-02 23:07:38,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3304 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=577, Invalid=30223, Unknown=0, NotChecked=0, Total=30800 [2021-11-02 23:07:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-02 23:07:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 105. [2021-11-02 23:07:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 30 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-02 23:07:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-11-02 23:07:38,275 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 201 [2021-11-02 23:07:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:38,276 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-11-02 23:07:38,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 1.076271186440678) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 56 states have return successors, (56), 56 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-02 23:07:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-11-02 23:07:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-02 23:07:38,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:38,279 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:38,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:38,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:38,504 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash -941688870, now seen corresponding path program 14 times [2021-11-02 23:07:38,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:38,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034020882] [2021-11-02 23:07:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:38,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:39,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-02 23:07:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:41,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034020882] [2021-11-02 23:07:41,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034020882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:41,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508232244] [2021-11-02 23:07:41,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:41,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:41,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:41,773 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:07:43,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:43,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 240 conjunts are in the unsatisfiable core [2021-11-02 23:07:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-02 23:07:45,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508232244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:45,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:45,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2021-11-02 23:07:45,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321957389] [2021-11-02 23:07:45,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-02 23:07:45,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-02 23:07:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:07:45,344 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 29 states have return successors, (30), 30 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-02 23:07:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:49,052 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2021-11-02 23:07:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-02 23:07:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 29 states have return successors, (30), 30 states have call predecessors, (30), 4 states have call successors, (30) Word has length 208 [2021-11-02 23:07:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:49,056 INFO L225 Difference]: With dead ends: 195 [2021-11-02 23:07:49,056 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:07:49,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=372, Invalid=15128, Unknown=0, NotChecked=0, Total=15500 [2021-11-02 23:07:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:07:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-11-02 23:07:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 31 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-02 23:07:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-11-02 23:07:49,068 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 208 [2021-11-02 23:07:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:49,069 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-11-02 23:07:49,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 1 states have call predecessors, (4), 29 states have return successors, (30), 30 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-02 23:07:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-11-02 23:07:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-02 23:07:49,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:49,071 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:49,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:49,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:07:49,284 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash 482690706, now seen corresponding path program 14 times [2021-11-02 23:07:49,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:49,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480439018] [2021-11-02 23:07:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:49,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:07:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-02 23:07:52,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:52,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480439018] [2021-11-02 23:07:52,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480439018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:52,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585655651] [2021-11-02 23:07:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:52,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:52,601 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:52,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:07:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-02 23:07:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-02 23:07:59,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585655651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:59,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 127 [2021-11-02 23:07:59,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618026442] [2021-11-02 23:07:59,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-02 23:07:59,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-02 23:07:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=15690, Unknown=0, NotChecked=0, Total=16002 [2021-11-02 23:07:59,603 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 127 states, 126 states have (on average 1.0714285714285714) internal successors, (135), 67 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 60 states have return successors, (60), 60 states have call predecessors, (60), 4 states have call successors, (60) [2021-11-02 23:08:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:06,826 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2021-11-02 23:08:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:08:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 1.0714285714285714) internal successors, (135), 67 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 60 states have return successors, (60), 60 states have call predecessors, (60), 4 states have call successors, (60) Word has length 215 [2021-11-02 23:08:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:06,829 INFO L225 Difference]: With dead ends: 201 [2021-11-02 23:08:06,829 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 23:08:06,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=617, Invalid=34539, Unknown=0, NotChecked=0, Total=35156 [2021-11-02 23:08:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 23:08:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2021-11-02 23:08:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 32 states have return successors, (33), 32 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-02 23:08:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-11-02 23:08:06,839 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 215 [2021-11-02 23:08:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:06,840 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-11-02 23:08:06,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 1.0714285714285714) internal successors, (135), 67 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 60 states have return successors, (60), 60 states have call predecessors, (60), 4 states have call successors, (60) [2021-11-02 23:08:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-11-02 23:08:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-02 23:08:06,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:06,842 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:06,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:07,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:07,042 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 837482372, now seen corresponding path program 15 times [2021-11-02 23:08:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603518633] [2021-11-02 23:08:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:07,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:07,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:08,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:09,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-11-02 23:08:10,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:10,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603518633] [2021-11-02 23:08:10,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603518633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:10,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444257433] [2021-11-02 23:08:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:10,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:10,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:10,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:08:12,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:08:12,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:12,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-02 23:08:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-11-02 23:08:14,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444257433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:14,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:14,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2021-11-02 23:08:14,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321692693] [2021-11-02 23:08:14,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-02 23:08:14,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-02 23:08:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:08:14,359 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 71 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 39 states have internal predecessors, (77), 4 states have call successors, (4), 1 states have call predecessors, (4), 31 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-02 23:08:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:18,855 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2021-11-02 23:08:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:08:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 39 states have internal predecessors, (77), 4 states have call successors, (4), 1 states have call predecessors, (4), 31 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) Word has length 222 [2021-11-02 23:08:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:18,857 INFO L225 Difference]: With dead ends: 207 [2021-11-02 23:08:18,857 INFO L226 Difference]: Without dead ends: 203 [2021-11-02 23:08:18,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=396, Invalid=17160, Unknown=0, NotChecked=0, Total=17556 [2021-11-02 23:08:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-02 23:08:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 114. [2021-11-02 23:08:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 33 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-02 23:08:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-11-02 23:08:18,867 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 222 [2021-11-02 23:08:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:18,868 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-11-02 23:08:18,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 39 states have internal predecessors, (77), 4 states have call successors, (4), 1 states have call predecessors, (4), 31 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-02 23:08:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-11-02 23:08:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-02 23:08:18,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:18,870 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:18,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:19,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:19,084 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:19,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1020068268, now seen corresponding path program 15 times [2021-11-02 23:08:19,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:19,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270274841] [2021-11-02 23:08:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:19,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2021-11-02 23:08:22,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:22,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270274841] [2021-11-02 23:08:22,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270274841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:22,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507439997] [2021-11-02 23:08:22,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:22,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:22,884 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:08:25,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:08:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-02 23:08:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2021-11-02 23:08:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507439997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:30,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 70] total 135 [2021-11-02 23:08:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009837818] [2021-11-02 23:08:30,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-02 23:08:30,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-02 23:08:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=17758, Unknown=0, NotChecked=0, Total=18090 [2021-11-02 23:08:30,904 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 135 states, 134 states have (on average 1.0671641791044777) internal successors, (143), 71 states have internal predecessors, (143), 4 states have call successors, (4), 1 states have call predecessors, (4), 64 states have return successors, (64), 64 states have call predecessors, (64), 4 states have call successors, (64) [2021-11-02 23:08:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:39,176 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2021-11-02 23:08:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-02 23:08:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 1.0671641791044777) internal successors, (143), 71 states have internal predecessors, (143), 4 states have call successors, (4), 1 states have call predecessors, (4), 64 states have return successors, (64), 64 states have call predecessors, (64), 4 states have call successors, (64) Word has length 229 [2021-11-02 23:08:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:39,179 INFO L225 Difference]: With dead ends: 213 [2021-11-02 23:08:39,180 INFO L226 Difference]: Without dead ends: 209 [2021-11-02 23:08:39,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=657, Invalid=39143, Unknown=0, NotChecked=0, Total=39800 [2021-11-02 23:08:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-02 23:08:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 117. [2021-11-02 23:08:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 34 states have return successors, (35), 34 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-02 23:08:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-02 23:08:39,192 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 229 [2021-11-02 23:08:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-02 23:08:39,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 1.0671641791044777) internal successors, (143), 71 states have internal predecessors, (143), 4 states have call successors, (4), 1 states have call predecessors, (4), 64 states have return successors, (64), 64 states have call predecessors, (64), 4 states have call successors, (64) [2021-11-02 23:08:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-02 23:08:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 23:08:39,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:39,196 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:39,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:39,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:08:39,416 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1968238162, now seen corresponding path program 16 times [2021-11-02 23:08:39,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:39,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076640001] [2021-11-02 23:08:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:39,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:43,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2021-11-02 23:08:43,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076640001] [2021-11-02 23:08:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076640001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971917913] [2021-11-02 23:08:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:43,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:43,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:43,519 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:08:46,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:46,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 272 conjunts are in the unsatisfiable core [2021-11-02 23:08:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2021-11-02 23:08:47,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971917913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:47,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:47,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2021-11-02 23:08:47,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35784452] [2021-11-02 23:08:47,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 23:08:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 23:08:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:08:47,923 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 75 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 41 states have internal predecessors, (81), 4 states have call successors, (4), 1 states have call predecessors, (4), 33 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-02 23:08:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:53,150 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-11-02 23:08:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-02 23:08:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 41 states have internal predecessors, (81), 4 states have call successors, (4), 1 states have call predecessors, (4), 33 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) Word has length 236 [2021-11-02 23:08:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:53,153 INFO L225 Difference]: With dead ends: 219 [2021-11-02 23:08:53,154 INFO L226 Difference]: Without dead ends: 215 [2021-11-02 23:08:53,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=420, Invalid=19320, Unknown=0, NotChecked=0, Total=19740 [2021-11-02 23:08:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-02 23:08:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 120. [2021-11-02 23:08:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 35 states have return successors, (36), 35 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-02 23:08:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-11-02 23:08:53,165 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 236 [2021-11-02 23:08:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:53,166 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-11-02 23:08:53,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 41 states have internal predecessors, (81), 4 states have call successors, (4), 1 states have call predecessors, (4), 33 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-02 23:08:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-11-02 23:08:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-02 23:08:53,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:53,169 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:53,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:53,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:53,384 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash 193478470, now seen corresponding path program 16 times [2021-11-02 23:08:53,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:53,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142007364] [2021-11-02 23:08:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:53,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:53,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:53,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:08:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-02 23:08:57,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:57,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142007364] [2021-11-02 23:08:57,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142007364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:57,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236553783] [2021-11-02 23:08:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:57,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:57,799 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:09:00,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:00,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:00,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 280 conjunts are in the unsatisfiable core [2021-11-02 23:09:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-02 23:09:02,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236553783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:02,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:02,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 76 [2021-11-02 23:09:02,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060696460] [2021-11-02 23:09:02,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-02 23:09:02,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-02 23:09:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5547, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:09:02,212 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 34 states have return successors, (35), 35 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-02 23:09:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:07,636 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2021-11-02 23:09:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-02 23:09:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 34 states have return successors, (35), 35 states have call predecessors, (35), 4 states have call successors, (35) Word has length 243 [2021-11-02 23:09:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:07,639 INFO L225 Difference]: With dead ends: 225 [2021-11-02 23:09:07,639 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:09:07,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=426, Invalid=20166, Unknown=0, NotChecked=0, Total=20592 [2021-11-02 23:09:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:09:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 123. [2021-11-02 23:09:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 36 states have return successors, (37), 36 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-02 23:09:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-11-02 23:09:07,648 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 243 [2021-11-02 23:09:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:07,649 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-11-02 23:09:07,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 34 states have return successors, (35), 35 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-02 23:09:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-11-02 23:09:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-02 23:09:07,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:07,651 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:07,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:07,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:09:07,876 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1478616664, now seen corresponding path program 17 times [2021-11-02 23:09:07,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:07,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927817329] [2021-11-02 23:09:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:07,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:09,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:12,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:12,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2021-11-02 23:09:12,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:12,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927817329] [2021-11-02 23:09:12,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927817329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:12,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730808551] [2021-11-02 23:09:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:12,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:12,578 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:12,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:09:15,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 23:09:15,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:15,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 288 conjunts are in the unsatisfiable core [2021-11-02 23:09:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2021-11-02 23:09:17,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730808551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:17,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:17,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2021-11-02 23:09:17,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704256597] [2021-11-02 23:09:17,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-02 23:09:17,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-02 23:09:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:09:17,423 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 79 states, 77 states have (on average 1.103896103896104) internal successors, (85), 43 states have internal predecessors, (85), 4 states have call successors, (4), 1 states have call predecessors, (4), 35 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-02 23:09:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:22,791 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-11-02 23:09:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-02 23:09:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 1.103896103896104) internal successors, (85), 43 states have internal predecessors, (85), 4 states have call successors, (4), 1 states have call predecessors, (4), 35 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) Word has length 250 [2021-11-02 23:09:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:22,793 INFO L225 Difference]: With dead ends: 231 [2021-11-02 23:09:22,794 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 23:09:22,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=444, Invalid=21608, Unknown=0, NotChecked=0, Total=22052 [2021-11-02 23:09:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 23:09:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 126. [2021-11-02 23:09:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 37 states have return successors, (38), 37 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-02 23:09:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-11-02 23:09:22,806 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 250 [2021-11-02 23:09:22,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:22,806 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-11-02 23:09:22,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 1.103896103896104) internal successors, (85), 43 states have internal predecessors, (85), 4 states have call successors, (4), 1 states have call predecessors, (4), 35 states have return successors, (36), 36 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-02 23:09:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-11-02 23:09:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-02 23:09:22,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:22,809 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:22,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:23,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:09:23,024 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1190748320, now seen corresponding path program 17 times [2021-11-02 23:09:23,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:23,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188753296] [2021-11-02 23:09:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:23,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2021-11-02 23:09:27,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:27,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188753296] [2021-11-02 23:09:27,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188753296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:27,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987235872] [2021-11-02 23:09:27,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:27,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:27,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:27,522 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:27,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:09:30,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 23:09:30,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:30,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 296 conjunts are in the unsatisfiable core [2021-11-02 23:09:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2021-11-02 23:09:31,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987235872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:31,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:31,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 81 [2021-11-02 23:09:31,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944337259] [2021-11-02 23:09:31,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-02 23:09:31,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-02 23:09:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6315, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 23:09:31,972 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 81 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 44 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (37), 37 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-02 23:09:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:37,909 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2021-11-02 23:09:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-02 23:09:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 44 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (37), 37 states have call predecessors, (37), 4 states have call successors, (37) Word has length 257 [2021-11-02 23:09:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:37,911 INFO L225 Difference]: With dead ends: 237 [2021-11-02 23:09:37,911 INFO L226 Difference]: Without dead ends: 233 [2021-11-02 23:09:37,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=455, Invalid=22801, Unknown=0, NotChecked=0, Total=23256 [2021-11-02 23:09:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-02 23:09:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 129. [2021-11-02 23:09:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 38 states have return successors, (39), 38 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-02 23:09:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-11-02 23:09:37,921 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 257 [2021-11-02 23:09:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:37,922 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-11-02 23:09:37,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 44 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 36 states have return successors, (37), 37 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-02 23:09:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-11-02 23:09:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-02 23:09:37,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:37,925 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:37,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:38,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:09:38,140 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1726092674, now seen corresponding path program 18 times [2021-11-02 23:09:38,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:38,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937592055] [2021-11-02 23:09:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:38,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2021-11-02 23:09:42,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937592055] [2021-11-02 23:09:42,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937592055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013708248] [2021-11-02 23:09:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:42,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:42,970 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:09:45,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:09:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:46,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 304 conjunts are in the unsatisfiable core [2021-11-02 23:09:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2021-11-02 23:09:47,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013708248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:47,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:47,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2021-11-02 23:09:47,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56947595] [2021-11-02 23:09:47,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-02 23:09:47,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-02 23:09:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2021-11-02 23:09:47,801 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 83 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 45 states have internal predecessors, (89), 4 states have call successors, (4), 1 states have call predecessors, (4), 37 states have return successors, (38), 38 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-02 23:09:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:54,079 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2021-11-02 23:09:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-02 23:09:54,079 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 45 states have internal predecessors, (89), 4 states have call successors, (4), 1 states have call predecessors, (4), 37 states have return successors, (38), 38 states have call predecessors, (38), 4 states have call successors, (38) Word has length 264 [2021-11-02 23:09:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:54,082 INFO L225 Difference]: With dead ends: 243 [2021-11-02 23:09:54,082 INFO L226 Difference]: Without dead ends: 239 [2021-11-02 23:09:54,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=468, Invalid=24024, Unknown=0, NotChecked=0, Total=24492 [2021-11-02 23:09:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-02 23:09:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 132. [2021-11-02 23:09:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 39 states have return successors, (40), 39 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-02 23:09:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-11-02 23:09:54,093 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 264 [2021-11-02 23:09:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-11-02 23:09:54,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 45 states have internal predecessors, (89), 4 states have call successors, (4), 1 states have call predecessors, (4), 37 states have return successors, (38), 38 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-02 23:09:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-11-02 23:09:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-02 23:09:54,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:54,097 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:54,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:54,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:09:54,320 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash -50347526, now seen corresponding path program 18 times [2021-11-02 23:09:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:54,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669579964] [2021-11-02 23:09:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:54,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:54,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:54,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:54,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:59,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:09:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2021-11-02 23:09:59,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:59,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669579964] [2021-11-02 23:09:59,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669579964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:59,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886348590] [2021-11-02 23:09:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:59,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:59,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:59,115 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:59,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:10:02,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:10:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 236 conjunts are in the unsatisfiable core [2021-11-02 23:10:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2021-11-02 23:10:10,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886348590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:10,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 159 [2021-11-02 23:10:10,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114651156] [2021-11-02 23:10:10,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-11-02 23:10:10,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-11-02 23:10:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=24730, Unknown=0, NotChecked=0, Total=25122 [2021-11-02 23:10:10,647 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 159 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 83 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 76 states have return successors, (76), 76 states have call predecessors, (76), 3 states have call successors, (76) [2021-11-02 23:10:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:21,614 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2021-11-02 23:10:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-02 23:10:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 83 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 76 states have return successors, (76), 76 states have call predecessors, (76), 3 states have call successors, (76) Word has length 271 [2021-11-02 23:10:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:21,617 INFO L225 Difference]: With dead ends: 249 [2021-11-02 23:10:21,617 INFO L226 Difference]: Without dead ends: 245 [2021-11-02 23:10:21,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6157 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=777, Invalid=54683, Unknown=0, NotChecked=0, Total=55460 [2021-11-02 23:10:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-02 23:10:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 135. [2021-11-02 23:10:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 2 states have call predecessors, (3), 40 states have return successors, (41), 40 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-02 23:10:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-11-02 23:10:21,628 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 271 [2021-11-02 23:10:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-11-02 23:10:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 83 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 76 states have return successors, (76), 76 states have call predecessors, (76), 3 states have call successors, (76) [2021-11-02 23:10:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-11-02 23:10:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-02 23:10:21,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:21,632 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:21,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:21,848 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -197771476, now seen corresponding path program 19 times [2021-11-02 23:10:21,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:21,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126934951] [2021-11-02 23:10:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:21,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:23,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:25,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2021-11-02 23:10:26,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:26,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126934951] [2021-11-02 23:10:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126934951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:26,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056398714] [2021-11-02 23:10:26,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:26,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:26,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:26,556 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:26,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:10:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:29,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 320 conjunts are in the unsatisfiable core [2021-11-02 23:10:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2021-11-02 23:10:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056398714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:31,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:31,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2021-11-02 23:10:31,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711434770] [2021-11-02 23:10:31,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-02 23:10:31,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-02 23:10:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:10:31,645 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 87 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 47 states have internal predecessors, (93), 4 states have call successors, (4), 1 states have call predecessors, (4), 39 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-02 23:10:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:38,609 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2021-11-02 23:10:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 23:10:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 47 states have internal predecessors, (93), 4 states have call successors, (4), 1 states have call predecessors, (4), 39 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) Word has length 278 [2021-11-02 23:10:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:38,611 INFO L225 Difference]: With dead ends: 255 [2021-11-02 23:10:38,611 INFO L226 Difference]: Without dead ends: 251 [2021-11-02 23:10:38,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=492, Invalid=26568, Unknown=0, NotChecked=0, Total=27060 [2021-11-02 23:10:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-02 23:10:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 138. [2021-11-02 23:10:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 41 states have return successors, (42), 41 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-02 23:10:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2021-11-02 23:10:38,622 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 278 [2021-11-02 23:10:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2021-11-02 23:10:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 47 states have internal predecessors, (93), 4 states have call successors, (4), 1 states have call predecessors, (4), 39 states have return successors, (40), 40 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-02 23:10:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2021-11-02 23:10:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-02 23:10:38,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:38,626 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:38,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:38,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:10:38,840 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash -254589164, now seen corresponding path program 19 times [2021-11-02 23:10:38,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:38,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423449247] [2021-11-02 23:10:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:38,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:40,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:42,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:43,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:43,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:10:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2021-11-02 23:10:43,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:43,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423449247] [2021-11-02 23:10:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423449247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:43,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434431030] [2021-11-02 23:10:43,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:43,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:43,447 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:43,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:10:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 248 conjunts are in the unsatisfiable core [2021-11-02 23:10:46,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2021-11-02 23:10:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434431030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:54,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:54,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 167 [2021-11-02 23:10:54,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353844790] [2021-11-02 23:10:54,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-11-02 23:10:54,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-11-02 23:10:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=27310, Unknown=0, NotChecked=0, Total=27722 [2021-11-02 23:10:54,542 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 167 states, 166 states have (on average 1.0481927710843373) internal successors, (174), 87 states have internal predecessors, (174), 3 states have call successors, (3), 1 states have call predecessors, (3), 80 states have return successors, (80), 80 states have call predecessors, (80), 3 states have call successors, (80) [2021-11-02 23:11:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:05,738 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-11-02 23:11:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 23:11:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 166 states have (on average 1.0481927710843373) internal successors, (174), 87 states have internal predecessors, (174), 3 states have call successors, (3), 1 states have call predecessors, (3), 80 states have return successors, (80), 80 states have call predecessors, (80), 3 states have call successors, (80) Word has length 285 [2021-11-02 23:11:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:05,740 INFO L225 Difference]: With dead ends: 261 [2021-11-02 23:11:05,740 INFO L226 Difference]: Without dead ends: 257 [2021-11-02 23:11:05,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6801 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=817, Invalid=60439, Unknown=0, NotChecked=0, Total=61256 [2021-11-02 23:11:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-02 23:11:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 141. [2021-11-02 23:11:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 42 states have return successors, (43), 42 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-02 23:11:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-11-02 23:11:05,752 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 285 [2021-11-02 23:11:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-11-02 23:11:05,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 166 states have (on average 1.0481927710843373) internal successors, (174), 87 states have internal predecessors, (174), 3 states have call successors, (3), 1 states have call predecessors, (3), 80 states have return successors, (80), 80 states have call predecessors, (80), 3 states have call successors, (80) [2021-11-02 23:11:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-11-02 23:11:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-02 23:11:05,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:05,756 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:05,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:05,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:05,976 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1477247830, now seen corresponding path program 20 times [2021-11-02 23:11:05,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:05,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117873627] [2021-11-02 23:11:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:05,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:06,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:08,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-11-02 23:11:10,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:10,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117873627] [2021-11-02 23:11:10,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117873627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:10,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564413451] [2021-11-02 23:11:10,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:10,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:10,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:10,944 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:11:14,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:14,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:14,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 336 conjunts are in the unsatisfiable core [2021-11-02 23:11:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-11-02 23:11:16,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564413451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:16,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:16,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2021-11-02 23:11:16,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371857847] [2021-11-02 23:11:16,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-02 23:11:16,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-02 23:11:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:11:16,224 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 91 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 49 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 41 states have return successors, (42), 42 states have call predecessors, (42), 4 states have call successors, (42) [2021-11-02 23:11:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:23,350 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2021-11-02 23:11:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-02 23:11:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 49 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 41 states have return successors, (42), 42 states have call predecessors, (42), 4 states have call successors, (42) Word has length 292 [2021-11-02 23:11:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:23,352 INFO L225 Difference]: With dead ends: 267 [2021-11-02 23:11:23,352 INFO L226 Difference]: Without dead ends: 263 [2021-11-02 23:11:23,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 369 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=516, Invalid=29240, Unknown=0, NotChecked=0, Total=29756 [2021-11-02 23:11:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-02 23:11:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 144. [2021-11-02 23:11:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 43 states have return successors, (44), 43 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-02 23:11:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-11-02 23:11:23,364 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 292 [2021-11-02 23:11:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:23,364 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-11-02 23:11:23,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 49 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 41 states have return successors, (42), 42 states have call predecessors, (42), 4 states have call successors, (42) [2021-11-02 23:11:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-11-02 23:11:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-02 23:11:23,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:23,368 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:23,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-02 23:11:23,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:23,580 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1770573486, now seen corresponding path program 20 times [2021-11-02 23:11:23,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:23,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872131631] [2021-11-02 23:11:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:23,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:23,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:23,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:24,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:25,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-02 23:11:28,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:28,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872131631] [2021-11-02 23:11:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872131631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:28,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456639034] [2021-11-02 23:11:28,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:28,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:28,908 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:28,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:11:32,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 260 conjunts are in the unsatisfiable core [2021-11-02 23:11:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-02 23:11:40,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456639034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:40,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:40,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 90] total 175 [2021-11-02 23:11:40,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440022067] [2021-11-02 23:11:40,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2021-11-02 23:11:40,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-11-02 23:11:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=30018, Unknown=0, NotChecked=0, Total=30450 [2021-11-02 23:11:40,857 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 175 states, 174 states have (on average 1.0517241379310345) internal successors, (183), 91 states have internal predecessors, (183), 4 states have call successors, (4), 1 states have call predecessors, (4), 84 states have return successors, (84), 84 states have call predecessors, (84), 4 states have call successors, (84) [2021-11-02 23:11:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:52,727 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2021-11-02 23:11:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-02 23:11:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 174 states have (on average 1.0517241379310345) internal successors, (183), 91 states have internal predecessors, (183), 4 states have call successors, (4), 1 states have call predecessors, (4), 84 states have return successors, (84), 84 states have call predecessors, (84), 4 states have call successors, (84) Word has length 299 [2021-11-02 23:11:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:52,729 INFO L225 Difference]: With dead ends: 273 [2021-11-02 23:11:52,729 INFO L226 Difference]: Without dead ends: 269 [2021-11-02 23:11:52,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7308 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=857, Invalid=66483, Unknown=0, NotChecked=0, Total=67340 [2021-11-02 23:11:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-02 23:11:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 147. [2021-11-02 23:11:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 44 states have return successors, (45), 44 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-02 23:11:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2021-11-02 23:11:52,742 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 299 [2021-11-02 23:11:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:52,742 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2021-11-02 23:11:52,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 174 states have (on average 1.0517241379310345) internal successors, (183), 91 states have internal predecessors, (183), 4 states have call successors, (4), 1 states have call predecessors, (4), 84 states have return successors, (84), 84 states have call predecessors, (84), 4 states have call successors, (84) [2021-11-02 23:11:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2021-11-02 23:11:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-02 23:11:52,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:52,745 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:52,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:52,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:11:52,972 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash 788333056, now seen corresponding path program 21 times [2021-11-02 23:11:52,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:52,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732955174] [2021-11-02 23:11:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:52,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:53,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:55,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:11:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2021-11-02 23:11:58,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732955174] [2021-11-02 23:11:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732955174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227324415] [2021-11-02 23:11:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:58,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:58,586 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:58,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:12:02,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-02 23:12:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:02,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 352 conjunts are in the unsatisfiable core [2021-11-02 23:12:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2021-11-02 23:12:04,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227324415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:04,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 95 [2021-11-02 23:12:04,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057699657] [2021-11-02 23:12:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-02 23:12:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-02 23:12:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=8736, Unknown=0, NotChecked=0, Total=8930 [2021-11-02 23:12:04,294 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 95 states, 93 states have (on average 1.086021505376344) internal successors, (101), 51 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 4 states have call successors, (44) [2021-11-02 23:12:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:11,587 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2021-11-02 23:12:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 23:12:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 1.086021505376344) internal successors, (101), 51 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 4 states have call successors, (44) Word has length 306 [2021-11-02 23:12:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:11,591 INFO L225 Difference]: With dead ends: 279 [2021-11-02 23:12:11,591 INFO L226 Difference]: Without dead ends: 275 [2021-11-02 23:12:11,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 387 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=540, Invalid=32040, Unknown=0, NotChecked=0, Total=32580 [2021-11-02 23:12:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-02 23:12:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 150. [2021-11-02 23:12:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 45 states have return successors, (46), 45 states have call predecessors, (46), 3 states have call successors, (46) [2021-11-02 23:12:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-11-02 23:12:11,602 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 306 [2021-11-02 23:12:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:11,602 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-11-02 23:12:11,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 1.086021505376344) internal successors, (101), 51 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 43 states have return successors, (44), 44 states have call predecessors, (44), 4 states have call successors, (44) [2021-11-02 23:12:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-11-02 23:12:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-02 23:12:11,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:11,606 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:11,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:11,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:11,824 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -774899512, now seen corresponding path program 21 times [2021-11-02 23:12:11,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:11,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683687229] [2021-11-02 23:12:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:11,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2021-11-02 23:12:17,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:17,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683687229] [2021-11-02 23:12:17,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683687229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:17,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772891607] [2021-11-02 23:12:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:17,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:17,507 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:17,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:12:21,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-02 23:12:21,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 272 conjunts are in the unsatisfiable core [2021-11-02 23:12:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2021-11-02 23:12:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772891607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:30,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:30,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 184 [2021-11-02 23:12:30,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573235813] [2021-11-02 23:12:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-11-02 23:12:30,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-11-02 23:12:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=33216, Unknown=0, NotChecked=0, Total=33672 [2021-11-02 23:12:30,961 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 184 states, 182 states have (on average 1.0494505494505495) internal successors, (191), 96 states have internal predecessors, (191), 4 states have call successors, (4), 1 states have call predecessors, (4), 88 states have return successors, (88), 88 states have call predecessors, (88), 4 states have call successors, (88) [2021-11-02 23:12:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:45,033 INFO L93 Difference]: Finished difference Result 285 states and 287 transitions. [2021-11-02 23:12:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-02 23:12:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 182 states have (on average 1.0494505494505495) internal successors, (191), 96 states have internal predecessors, (191), 4 states have call successors, (4), 1 states have call predecessors, (4), 88 states have return successors, (88), 88 states have call predecessors, (88), 4 states have call successors, (88) Word has length 313 [2021-11-02 23:12:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:45,034 INFO L225 Difference]: With dead ends: 285 [2021-11-02 23:12:45,035 INFO L226 Difference]: Without dead ends: 281 [2021-11-02 23:12:45,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8359 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=903, Invalid=73353, Unknown=0, NotChecked=0, Total=74256 [2021-11-02 23:12:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-02 23:12:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 153. [2021-11-02 23:12:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 46 states have return successors, (47), 46 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-02 23:12:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-02 23:12:45,045 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 313 [2021-11-02 23:12:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-02 23:12:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 182 states have (on average 1.0494505494505495) internal successors, (191), 96 states have internal predecessors, (191), 4 states have call successors, (4), 1 states have call predecessors, (4), 88 states have return successors, (88), 88 states have call predecessors, (88), 4 states have call successors, (88) [2021-11-02 23:12:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-02 23:12:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-02 23:12:45,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:45,049 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:45,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:45,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:12:45,276 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash 71621418, now seen corresponding path program 22 times [2021-11-02 23:12:45,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:45,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995256491] [2021-11-02 23:12:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:45,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:45,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:48,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:12:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2021-11-02 23:12:51,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:51,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995256491] [2021-11-02 23:12:51,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995256491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:51,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639645852] [2021-11-02 23:12:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:51,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:51,304 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:51,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:12:55,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:55,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:55,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 368 conjunts are in the unsatisfiable core [2021-11-02 23:12:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2021-11-02 23:12:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639645852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:57,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 99 [2021-11-02 23:12:57,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294893056] [2021-11-02 23:12:57,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-02 23:12:57,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-02 23:12:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=9500, Unknown=0, NotChecked=0, Total=9702 [2021-11-02 23:12:57,279 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 99 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 53 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 45 states have return successors, (46), 46 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-02 23:13:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:04,949 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2021-11-02 23:13:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-02 23:13:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 53 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 45 states have return successors, (46), 46 states have call predecessors, (46), 4 states have call successors, (46) Word has length 320 [2021-11-02 23:13:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:04,951 INFO L225 Difference]: With dead ends: 291 [2021-11-02 23:13:04,951 INFO L226 Difference]: Without dead ends: 287 [2021-11-02 23:13:04,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 405 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=564, Invalid=34968, Unknown=0, NotChecked=0, Total=35532 [2021-11-02 23:13:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-02 23:13:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 156. [2021-11-02 23:13:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 105 states have (on average 1.019047619047619) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 2 states have call predecessors, (3), 47 states have return successors, (48), 47 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-02 23:13:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-11-02 23:13:04,961 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 320 [2021-11-02 23:13:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-11-02 23:13:04,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 53 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 45 states have return successors, (46), 46 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-02 23:13:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-11-02 23:13:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-02 23:13:04,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:04,965 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:05,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:05,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:13:05,191 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2080348830, now seen corresponding path program 22 times [2021-11-02 23:13:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:05,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245794562] [2021-11-02 23:13:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:06,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3498 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2021-11-02 23:13:10,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:10,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245794562] [2021-11-02 23:13:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245794562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:10,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046637696] [2021-11-02 23:13:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:10,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:10,949 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:10,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:13:15,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:15,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 376 conjunts are in the unsatisfiable core [2021-11-02 23:13:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3498 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2021-11-02 23:13:17,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046637696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:17,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:17,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 98] total 100 [2021-11-02 23:13:17,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322052694] [2021-11-02 23:13:17,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-02 23:13:17,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-02 23:13:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=9699, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:13:17,244 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 100 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 53 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 46 states have return successors, (47), 47 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-02 23:13:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:25,489 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2021-11-02 23:13:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-02 23:13:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 53 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 46 states have return successors, (47), 47 states have call predecessors, (47), 4 states have call successors, (47) Word has length 327 [2021-11-02 23:13:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:25,490 INFO L225 Difference]: With dead ends: 297 [2021-11-02 23:13:25,490 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:13:25,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4374 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=570, Invalid=36102, Unknown=0, NotChecked=0, Total=36672 [2021-11-02 23:13:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:13:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 159. [2021-11-02 23:13:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 48 states have return successors, (49), 48 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-02 23:13:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-11-02 23:13:25,499 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 327 [2021-11-02 23:13:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:25,499 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-11-02 23:13:25,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 53 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 46 states have return successors, (47), 47 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-02 23:13:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-11-02 23:13:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-02 23:13:25,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:25,502 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:25,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:25,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:13:25,728 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2076913364, now seen corresponding path program 23 times [2021-11-02 23:13:25,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:25,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170219677] [2021-11-02 23:13:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:25,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:26,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3657 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 2093 trivial. 0 not checked. [2021-11-02 23:13:31,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:31,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170219677] [2021-11-02 23:13:31,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170219677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:31,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145301601] [2021-11-02 23:13:31,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:31,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:31,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:31,821 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:31,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:13:36,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-02 23:13:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:36,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-02 23:13:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3657 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 2093 trivial. 0 not checked. [2021-11-02 23:13:38,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145301601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:38,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:38,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 103 [2021-11-02 23:13:38,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211999578] [2021-11-02 23:13:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-02 23:13:38,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-02 23:13:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10296, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:13:38,523 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 103 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 55 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 47 states have return successors, (48), 48 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-02 23:13:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:46,975 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2021-11-02 23:13:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-02 23:13:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 55 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 47 states have return successors, (48), 48 states have call predecessors, (48), 4 states have call successors, (48) Word has length 334 [2021-11-02 23:13:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:46,977 INFO L225 Difference]: With dead ends: 303 [2021-11-02 23:13:46,977 INFO L226 Difference]: Without dead ends: 299 [2021-11-02 23:13:46,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4852 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=588, Invalid=38024, Unknown=0, NotChecked=0, Total=38612 [2021-11-02 23:13:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-02 23:13:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 162. [2021-11-02 23:13:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 2 states have call predecessors, (3), 49 states have return successors, (50), 49 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-02 23:13:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2021-11-02 23:13:46,986 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 334 [2021-11-02 23:13:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:46,986 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2021-11-02 23:13:46,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 55 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 47 states have return successors, (48), 48 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-02 23:13:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2021-11-02 23:13:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-02 23:13:46,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:46,989 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:47,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:47,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:47,200 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1541819268, now seen corresponding path program 23 times [2021-11-02 23:13:47,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:47,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952932058] [2021-11-02 23:13:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:47,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:53,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:13:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 23:13:53,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:53,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952932058] [2021-11-02 23:13:53,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952932058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:53,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468398099] [2021-11-02 23:13:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:53,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:53,493 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:53,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:13:58,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-02 23:13:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 296 conjunts are in the unsatisfiable core [2021-11-02 23:13:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-02 23:14:08,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468398099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:08,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:08,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 102] total 199 [2021-11-02 23:14:08,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619678436] [2021-11-02 23:14:08,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2021-11-02 23:14:08,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2021-11-02 23:14:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=38910, Unknown=0, NotChecked=0, Total=39402 [2021-11-02 23:14:08,515 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 199 states, 198 states have (on average 1.0454545454545454) internal successors, (207), 103 states have internal predecessors, (207), 4 states have call successors, (4), 1 states have call predecessors, (4), 96 states have return successors, (96), 96 states have call predecessors, (96), 4 states have call successors, (96) [2021-11-02 23:14:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:22,888 INFO L93 Difference]: Finished difference Result 309 states and 311 transitions. [2021-11-02 23:14:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-02 23:14:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 198 states have (on average 1.0454545454545454) internal successors, (207), 103 states have internal predecessors, (207), 4 states have call successors, (4), 1 states have call predecessors, (4), 96 states have return successors, (96), 96 states have call predecessors, (96), 4 states have call successors, (96) Word has length 341 [2021-11-02 23:14:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:22,890 INFO L225 Difference]: With dead ends: 309 [2021-11-02 23:14:22,891 INFO L226 Difference]: Without dead ends: 305 [2021-11-02 23:14:22,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9504 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=977, Invalid=86343, Unknown=0, NotChecked=0, Total=87320 [2021-11-02 23:14:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-02 23:14:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 165. [2021-11-02 23:14:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 111 states have (on average 1.018018018018018) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 2 states have call predecessors, (3), 50 states have return successors, (51), 50 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-02 23:14:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-11-02 23:14:22,901 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 341 [2021-11-02 23:14:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:22,901 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-11-02 23:14:22,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 198 states have (on average 1.0454545454545454) internal successors, (207), 103 states have internal predecessors, (207), 4 states have call successors, (4), 1 states have call predecessors, (4), 96 states have return successors, (96), 96 states have call predecessors, (96), 4 states have call successors, (96) [2021-11-02 23:14:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-11-02 23:14:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-02 23:14:22,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:22,904 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:22,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:23,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 23:14:23,120 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -65102594, now seen corresponding path program 24 times [2021-11-02 23:14:23,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:23,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069341898] [2021-11-02 23:14:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:23,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:27,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 2280 trivial. 0 not checked. [2021-11-02 23:14:29,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:29,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069341898] [2021-11-02 23:14:29,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069341898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:29,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867481568] [2021-11-02 23:14:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:14:29,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:29,763 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:29,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:14:34,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:14:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:34,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 400 conjunts are in the unsatisfiable core [2021-11-02 23:14:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 2280 trivial. 0 not checked. [2021-11-02 23:14:36,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867481568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:36,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:36,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 107 [2021-11-02 23:14:36,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516796383] [2021-11-02 23:14:36,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-02 23:14:36,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-02 23:14:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11124, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:14:36,778 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 107 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 57 states have internal predecessors, (113), 4 states have call successors, (4), 1 states have call predecessors, (4), 49 states have return successors, (50), 50 states have call predecessors, (50), 4 states have call successors, (50) [2021-11-02 23:14:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:45,724 INFO L93 Difference]: Finished difference Result 315 states and 317 transitions. [2021-11-02 23:14:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-02 23:14:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 57 states have internal predecessors, (113), 4 states have call successors, (4), 1 states have call predecessors, (4), 49 states have return successors, (50), 50 states have call predecessors, (50), 4 states have call successors, (50) Word has length 348 [2021-11-02 23:14:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:45,726 INFO L225 Difference]: With dead ends: 315 [2021-11-02 23:14:45,726 INFO L226 Difference]: Without dead ends: 311 [2021-11-02 23:14:45,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 441 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=612, Invalid=41208, Unknown=0, NotChecked=0, Total=41820 [2021-11-02 23:14:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-02 23:14:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-11-02 23:14:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 2 states have call predecessors, (3), 51 states have return successors, (52), 51 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-02 23:14:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-11-02 23:14:45,733 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 348 [2021-11-02 23:14:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:45,734 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-11-02 23:14:45,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 57 states have internal predecessors, (113), 4 states have call successors, (4), 1 states have call predecessors, (4), 49 states have return successors, (50), 50 states have call predecessors, (50), 4 states have call successors, (50) [2021-11-02 23:14:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-11-02 23:14:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-02 23:14:45,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:45,736 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:45,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-02 23:14:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-02 23:14:45,936 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2042856982, now seen corresponding path program 24 times [2021-11-02 23:14:45,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:45,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755097189] [2021-11-02 23:14:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:45,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:47,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:49,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:50,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:52,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:14:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4152 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2021-11-02 23:14:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:53,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755097189] [2021-11-02 23:14:53,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755097189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:53,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978549015] [2021-11-02 23:14:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:14:53,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:53,091 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:53,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:14:58,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:14:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 308 conjunts are in the unsatisfiable core [2021-11-02 23:14:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4152 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2021-11-02 23:15:09,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978549015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:09,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:09,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 106] total 207 [2021-11-02 23:15:09,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126453791] [2021-11-02 23:15:09,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2021-11-02 23:15:09,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2021-11-02 23:15:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=42131, Unknown=0, NotChecked=0, Total=42642 [2021-11-02 23:15:09,326 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 207 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 107 states have internal predecessors, (215), 4 states have call successors, (4), 1 states have call predecessors, (4), 100 states have return successors, (100), 100 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-02 23:15:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:26,689 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2021-11-02 23:15:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-02 23:15:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 107 states have internal predecessors, (215), 4 states have call successors, (4), 1 states have call predecessors, (4), 100 states have return successors, (100), 100 states have call predecessors, (100), 4 states have call successors, (100) Word has length 355 [2021-11-02 23:15:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:26,691 INFO L225 Difference]: With dead ends: 321 [2021-11-02 23:15:26,691 INFO L226 Difference]: Without dead ends: 317 [2021-11-02 23:15:26,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10199 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1016, Invalid=93540, Unknown=0, NotChecked=0, Total=94556 [2021-11-02 23:15:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-02 23:15:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 171. [2021-11-02 23:15:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 52 states have return successors, (53), 52 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-02 23:15:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2021-11-02 23:15:26,704 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 355 [2021-11-02 23:15:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:26,705 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2021-11-02 23:15:26,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 107 states have internal predecessors, (215), 4 states have call successors, (4), 1 states have call predecessors, (4), 100 states have return successors, (100), 100 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-02 23:15:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2021-11-02 23:15:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-02 23:15:26,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:26,708 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:26,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:26,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:26,936 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -663370328, now seen corresponding path program 25 times [2021-11-02 23:15:26,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:26,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745717600] [2021-11-02 23:15:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:26,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:27,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:32,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:33,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:34,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:34,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-02 23:15:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2021-11-02 23:15:35,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:35,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745717600] [2021-11-02 23:15:35,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745717600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:35,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236120172] [2021-11-02 23:15:35,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:15:35,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:35,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:35,044 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:35,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54ca5a08-caa2-499c-8d92-fab952c7771a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:15:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:40,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 416 conjunts are in the unsatisfiable core [2021-11-02 23:15:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2021-11-02 23:15:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236120172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:42,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:42,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 111 [2021-11-02 23:15:42,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280054920] [2021-11-02 23:15:42,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-02 23:15:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-02 23:15:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=11984, Unknown=0, NotChecked=0, Total=12210 [2021-11-02 23:15:42,325 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 111 states, 109 states have (on average 1.073394495412844) internal successors, (117), 59 states have internal predecessors, (117), 4 states have call successors, (4), 1 states have call predecessors, (4), 51 states have return successors, (52), 52 states have call predecessors, (52), 4 states have call successors, (52)