./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY --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 de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:28:27,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:28:27,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:28:27,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:28:27,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:28:27,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:28:27,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:28:27,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:28:27,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:28:27,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:28:27,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:28:27,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:28:27,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:28:27,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:28:27,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:28:27,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:28:27,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:28:27,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:28:27,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:28:27,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:28:27,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:28:27,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:28:27,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:28:27,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:28:27,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:28:27,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:28:27,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:28:27,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:28:27,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:28:27,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:28:27,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:28:27,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:28:27,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:28:27,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:28:27,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:28:27,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:28:27,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:28:27,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:28:27,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:28:27,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:28:27,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:28:27,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:28:27,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:28:27,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:28:27,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:28:27,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:28:27,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:28:27,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:28:27,774 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:28:27,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:28:27,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:28:27,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:28:27,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:28:27,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:28:27,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:28:27,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:28:27,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:28:27,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:28:27,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:28:27,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:28:27,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:28:27,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:28:27,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:28:27,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:28:27,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:28:27,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:28:27,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:28:27,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:28:27,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:28:27,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:28:27,783 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:28:27,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:28:27,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:28:27,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:28:27,786 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_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-11-07 08:28:28,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:28:28,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:28:28,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:28:28,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:28:28,144 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:28:28,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-07 08:28:28,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/5d8bee476/1044b34d1fab472bacc9abb5b660b940/FLAG8efa05fec [2021-11-07 08:28:28,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:28:28,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-07 08:28:28,963 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/5d8bee476/1044b34d1fab472bacc9abb5b660b940/FLAG8efa05fec [2021-11-07 08:28:29,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/5d8bee476/1044b34d1fab472bacc9abb5b660b940 [2021-11-07 08:28:29,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:28:29,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:28:29,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:28:29,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:28:29,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:28:29,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac2e52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29, skipping insertion in model container [2021-11-07 08:28:29,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:28:29,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:28:29,478 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_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-11-07 08:28:29,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:28:29,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:28:29,566 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_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-11-07 08:28:29,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:28:29,614 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:28:29,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29 WrapperNode [2021-11-07 08:28:29,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:28:29,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:28:29,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:28:29,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:28:29,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:28:29,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:28:29,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:28:29,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:28:29,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:28:29,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:28:29,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:28:29,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:28:29,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (1/1) ... [2021-11-07 08:28:29,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:28:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:29,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:28:29,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:28:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:28:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:28:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:28:29,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:28:30,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:28:30,217 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 08:28:30,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:28:30 BoogieIcfgContainer [2021-11-07 08:28:30,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:28:30,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:28:30,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:28:30,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:28:30,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:28:29" (1/3) ... [2021-11-07 08:28:30,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:28:30, skipping insertion in model container [2021-11-07 08:28:30,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:29" (2/3) ... [2021-11-07 08:28:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:28:30, skipping insertion in model container [2021-11-07 08:28:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:28:30" (3/3) ... [2021-11-07 08:28:30,231 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-11-07 08:28:30,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:28:30,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:28:30,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:28:30,309 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 [2021-11-07 08:28:30,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:28:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:28:30,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:30,363 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:30,364 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-07 08:28:30,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:30,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868787876] [2021-11-07 08:28:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:30,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:30,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868787876] [2021-11-07 08:28:30,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868787876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:30,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:30,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:28:30,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461794966] [2021-11-07 08:28:30,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:28:30,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:28:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:28:30,851 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:30,872 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-07 08:28:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:28:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:28:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:30,884 INFO L225 Difference]: With dead ends: 57 [2021-11-07 08:28:30,885 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:28:30,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:28:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:28:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 08:28:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-07 08:28:30,929 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-07 08:28:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:30,930 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-07 08:28:30,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-07 08:28:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:28:30,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:30,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:28:30,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-07 08:28:30,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:30,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598993909] [2021-11-07 08:28:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:30,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:31,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:31,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598993909] [2021-11-07 08:28:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598993909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:31,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:31,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:28:31,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009345481] [2021-11-07 08:28:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:28:31,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:28:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:31,170 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:31,394 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-11-07 08:28:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:28:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:28:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:31,397 INFO L225 Difference]: With dead ends: 89 [2021-11-07 08:28:31,397 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 08:28:31,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 08:28:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-07 08:28:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-11-07 08:28:31,413 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-11-07 08:28:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:31,414 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-11-07 08:28:31,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-11-07 08:28:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:28:31,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:31,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:31,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:28:31,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-11-07 08:28:31,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:31,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768733066] [2021-11-07 08:28:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:31,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:31,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:31,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768733066] [2021-11-07 08:28:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768733066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:31,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:31,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:28:31,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769295029] [2021-11-07 08:28:31,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:31,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:31,625 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:31,918 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-11-07 08:28:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:28:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:28:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:31,921 INFO L225 Difference]: With dead ends: 143 [2021-11-07 08:28:31,922 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 08:28:31,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 08:28:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-11-07 08:28:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-11-07 08:28:31,935 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-11-07 08:28:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-11-07 08:28:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-11-07 08:28:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:28:31,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:31,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:28:31,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-11-07 08:28:31,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:31,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188968265] [2021-11-07 08:28:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:31,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:32,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:32,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188968265] [2021-11-07 08:28:32,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188968265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:32,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:32,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:28:32,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93530955] [2021-11-07 08:28:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:28:32,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:28:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:32,040 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:32,048 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2021-11-07 08:28:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:28:32,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 08:28:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:32,050 INFO L225 Difference]: With dead ends: 104 [2021-11-07 08:28:32,050 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 08:28:32,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 08:28:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 08:28:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 77 transitions. [2021-11-07 08:28:32,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 77 transitions. Word has length 19 [2021-11-07 08:28:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:32,078 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 77 transitions. [2021-11-07 08:28:32,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 77 transitions. [2021-11-07 08:28:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:28:32,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:32,079 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:32,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:28:32,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-11-07 08:28:32,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:32,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548070155] [2021-11-07 08:28:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:32,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:32,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:32,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548070155] [2021-11-07 08:28:32,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548070155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:32,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:32,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:28:32,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347823128] [2021-11-07 08:28:32,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:28:32,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:28:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:32,236 INFO L87 Difference]: Start difference. First operand 52 states and 77 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:32,256 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2021-11-07 08:28:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:28:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 08:28:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:32,260 INFO L225 Difference]: With dead ends: 73 [2021-11-07 08:28:32,260 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:28:32,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:28:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:28:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-07 08:28:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2021-11-07 08:28:32,288 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 25 [2021-11-07 08:28:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:32,291 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2021-11-07 08:28:32,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2021-11-07 08:28:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:28:32,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:32,296 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:32,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:28:32,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1738293938, now seen corresponding path program 1 times [2021-11-07 08:28:32,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:32,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189015975] [2021-11-07 08:28:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:32,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:32,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:32,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189015975] [2021-11-07 08:28:32,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189015975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:32,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:28:32,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142914651] [2021-11-07 08:28:32,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:32,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:32,549 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:32,846 INFO L93 Difference]: Finished difference Result 169 states and 249 transitions. [2021-11-07 08:28:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:28:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 08:28:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:32,850 INFO L225 Difference]: With dead ends: 169 [2021-11-07 08:28:32,850 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 08:28:32,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 08:28:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2021-11-07 08:28:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2021-11-07 08:28:32,874 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 25 [2021-11-07 08:28:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2021-11-07 08:28:32,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2021-11-07 08:28:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:28:32,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:32,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:32,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:28:32,878 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1125876944, now seen corresponding path program 1 times [2021-11-07 08:28:32,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:32,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102550830] [2021-11-07 08:28:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:32,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:33,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:33,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102550830] [2021-11-07 08:28:33,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102550830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:33,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283099809] [2021-11-07 08:28:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:33,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:33,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:33,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:28:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:28:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283099809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:33,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-07 08:28:33,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421816553] [2021-11-07 08:28:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:33,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:28:33,602 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:33,868 INFO L93 Difference]: Finished difference Result 153 states and 251 transitions. [2021-11-07 08:28:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:28:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:28:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:33,871 INFO L225 Difference]: With dead ends: 153 [2021-11-07 08:28:33,871 INFO L226 Difference]: Without dead ends: 119 [2021-11-07 08:28:33,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:28:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-07 08:28:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-11-07 08:28:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-11-07 08:28:33,895 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 26 [2021-11-07 08:28:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:33,896 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-11-07 08:28:33,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-11-07 08:28:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:28:33,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:33,901 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:33,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:34,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 801426209, now seen corresponding path program 1 times [2021-11-07 08:28:34,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:34,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380177053] [2021-11-07 08:28:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:34,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:34,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:34,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380177053] [2021-11-07 08:28:34,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380177053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:34,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804262757] [2021-11-07 08:28:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:34,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:34,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:34,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:28:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:28:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:34,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804262757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:34,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:34,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-07 08:28:34,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440870769] [2021-11-07 08:28:34,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:28:34,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:28:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:34,939 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:35,089 INFO L93 Difference]: Finished difference Result 193 states and 267 transitions. [2021-11-07 08:28:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:28:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 08:28:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:35,092 INFO L225 Difference]: With dead ends: 193 [2021-11-07 08:28:35,092 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 08:28:35,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:28:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 08:28:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-11-07 08:28:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 86 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2021-11-07 08:28:35,100 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 32 [2021-11-07 08:28:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:35,101 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2021-11-07 08:28:35,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2021-11-07 08:28:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:28:35,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:35,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:35,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:35,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:35,323 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 763937393, now seen corresponding path program 1 times [2021-11-07 08:28:35,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:35,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792953183] [2021-11-07 08:28:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:35,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:28:35,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:35,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792953183] [2021-11-07 08:28:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792953183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:35,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:35,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:28:35,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523041231] [2021-11-07 08:28:35,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:35,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:35,435 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:35,663 INFO L93 Difference]: Finished difference Result 253 states and 361 transitions. [2021-11-07 08:28:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:28:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 08:28:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:35,666 INFO L225 Difference]: With dead ends: 253 [2021-11-07 08:28:35,666 INFO L226 Difference]: Without dead ends: 181 [2021-11-07 08:28:35,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-07 08:28:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-11-07 08:28:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2021-11-07 08:28:35,688 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 39 [2021-11-07 08:28:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2021-11-07 08:28:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2021-11-07 08:28:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:28:35,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:35,700 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:28:35,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1940214352, now seen corresponding path program 1 times [2021-11-07 08:28:35,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:35,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162514066] [2021-11-07 08:28:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:35,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:28:35,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:35,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162514066] [2021-11-07 08:28:35,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162514066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:35,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:35,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:28:35,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104637750] [2021-11-07 08:28:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:35,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:35,870 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:36,079 INFO L93 Difference]: Finished difference Result 342 states and 498 transitions. [2021-11-07 08:28:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:28:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:28:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:36,082 INFO L225 Difference]: With dead ends: 342 [2021-11-07 08:28:36,082 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 08:28:36,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 08:28:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 155. [2021-11-07 08:28:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-11-07 08:28:36,092 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 52 [2021-11-07 08:28:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:36,093 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-11-07 08:28:36,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-11-07 08:28:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:28:36,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:36,096 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:36,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:28:36,096 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash -564670639, now seen corresponding path program 1 times [2021-11-07 08:28:36,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:36,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395262454] [2021-11-07 08:28:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:36,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:28:36,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:36,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395262454] [2021-11-07 08:28:36,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395262454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:36,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:28:36,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987046786] [2021-11-07 08:28:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:28:36,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:28:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:36,273 INFO L87 Difference]: Start difference. First operand 155 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:36,648 INFO L93 Difference]: Finished difference Result 607 states and 894 transitions. [2021-11-07 08:28:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:28:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:28:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:36,653 INFO L225 Difference]: With dead ends: 607 [2021-11-07 08:28:36,653 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 08:28:36,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 08:28:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 155. [2021-11-07 08:28:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-11-07 08:28:36,676 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 65 [2021-11-07 08:28:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:36,677 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-11-07 08:28:36,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-11-07 08:28:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:28:36,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:36,679 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:36,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:28:36,679 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1543642426, now seen corresponding path program 1 times [2021-11-07 08:28:36,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:36,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999969365] [2021-11-07 08:28:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:36,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:28:36,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:36,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999969365] [2021-11-07 08:28:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999969365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:36,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:36,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:28:36,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826206089] [2021-11-07 08:28:36,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:28:36,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:28:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:28:36,790 INFO L87 Difference]: Start difference. First operand 155 states and 229 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:36,930 INFO L93 Difference]: Finished difference Result 503 states and 745 transitions. [2021-11-07 08:28:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:28:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:28:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:36,934 INFO L225 Difference]: With dead ends: 503 [2021-11-07 08:28:36,935 INFO L226 Difference]: Without dead ends: 364 [2021-11-07 08:28:36,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-07 08:28:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 269. [2021-11-07 08:28:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5037313432835822) internal successors, (403), 268 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 403 transitions. [2021-11-07 08:28:36,951 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 403 transitions. Word has length 66 [2021-11-07 08:28:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:36,952 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 403 transitions. [2021-11-07 08:28:36,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 403 transitions. [2021-11-07 08:28:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:28:36,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:36,954 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:28:36,955 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1373754372, now seen corresponding path program 1 times [2021-11-07 08:28:36,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:36,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072917690] [2021-11-07 08:28:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:36,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:28:37,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:37,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072917690] [2021-11-07 08:28:37,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072917690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:37,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:37,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:28:37,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652142902] [2021-11-07 08:28:37,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:28:37,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:28:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:37,176 INFO L87 Difference]: Start difference. First operand 269 states and 403 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:37,983 INFO L93 Difference]: Finished difference Result 1362 states and 2021 transitions. [2021-11-07 08:28:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:28:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:28:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:37,994 INFO L225 Difference]: With dead ends: 1362 [2021-11-07 08:28:37,994 INFO L226 Difference]: Without dead ends: 1109 [2021-11-07 08:28:37,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:28:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-11-07 08:28:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 262. [2021-11-07 08:28:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5134099616858236) internal successors, (395), 261 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 395 transitions. [2021-11-07 08:28:38,020 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 395 transitions. Word has length 66 [2021-11-07 08:28:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:38,020 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 395 transitions. [2021-11-07 08:28:38,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 395 transitions. [2021-11-07 08:28:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:28:38,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:38,033 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:38,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:28:38,034 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1708732925, now seen corresponding path program 1 times [2021-11-07 08:28:38,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:38,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935750696] [2021-11-07 08:28:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:38,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:28:38,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:38,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935750696] [2021-11-07 08:28:38,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935750696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:38,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81874988] [2021-11-07 08:28:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:38,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:38,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:28:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:28:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 08:28:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81874988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:38,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:38,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 08:28:38,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000833729] [2021-11-07 08:28:38,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:28:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:28:38,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:28:38,775 INFO L87 Difference]: Start difference. First operand 262 states and 395 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:39,055 INFO L93 Difference]: Finished difference Result 846 states and 1280 transitions. [2021-11-07 08:28:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:28:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 08:28:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:39,061 INFO L225 Difference]: With dead ends: 846 [2021-11-07 08:28:39,061 INFO L226 Difference]: Without dead ends: 589 [2021-11-07 08:28:39,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:28:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-07 08:28:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 516. [2021-11-07 08:28:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.5009708737864078) internal successors, (773), 515 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 773 transitions. [2021-11-07 08:28:39,091 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 773 transitions. Word has length 68 [2021-11-07 08:28:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:39,092 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 773 transitions. [2021-11-07 08:28:39,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 773 transitions. [2021-11-07 08:28:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:28:39,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:39,095 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:39,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 08:28:39,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:28:39,314 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1866953413, now seen corresponding path program 1 times [2021-11-07 08:28:39,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:39,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751104109] [2021-11-07 08:28:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:39,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:28:39,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:39,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751104109] [2021-11-07 08:28:39,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751104109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:39,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657115988] [2021-11-07 08:28:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:39,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:39,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:28:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:28:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 08:28:40,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657115988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:40,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:40,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-11-07 08:28:40,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419692388] [2021-11-07 08:28:40,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:28:40,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:28:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:28:40,592 INFO L87 Difference]: Start difference. First operand 516 states and 773 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:41,180 INFO L93 Difference]: Finished difference Result 1474 states and 2200 transitions. [2021-11-07 08:28:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:28:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 08:28:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:41,188 INFO L225 Difference]: With dead ends: 1474 [2021-11-07 08:28:41,189 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 08:28:41,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:28:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 08:28:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 803. [2021-11-07 08:28:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.4351620947630923) internal successors, (1151), 802 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1151 transitions. [2021-11-07 08:28:41,252 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1151 transitions. Word has length 69 [2021-11-07 08:28:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:41,254 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1151 transitions. [2021-11-07 08:28:41,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1151 transitions. [2021-11-07 08:28:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:28:41,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:41,264 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:41,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:28:41,470 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2021-11-07 08:28:41,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:41,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214291109] [2021-11-07 08:28:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:41,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:28:41,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:41,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214291109] [2021-11-07 08:28:41,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214291109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:41,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71880520] [2021-11-07 08:28:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:41,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:41,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:41,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:28:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:28:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:28:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71880520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:42,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:42,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:28:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828163063] [2021-11-07 08:28:42,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:28:42,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:28:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:42,853 INFO L87 Difference]: Start difference. First operand 803 states and 1151 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:43,100 INFO L93 Difference]: Finished difference Result 1776 states and 2529 transitions. [2021-11-07 08:28:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:28:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:28:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:43,109 INFO L225 Difference]: With dead ends: 1776 [2021-11-07 08:28:43,109 INFO L226 Difference]: Without dead ends: 996 [2021-11-07 08:28:43,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:28:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-07 08:28:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 751. [2021-11-07 08:28:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.4493333333333334) internal successors, (1087), 750 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1087 transitions. [2021-11-07 08:28:43,157 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1087 transitions. Word has length 70 [2021-11-07 08:28:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:43,158 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1087 transitions. [2021-11-07 08:28:43,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1087 transitions. [2021-11-07 08:28:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:28:43,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:43,161 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:43,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:43,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:28:43,369 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:43,370 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-11-07 08:28:43,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:43,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697117700] [2021-11-07 08:28:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:43,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:28:43,448 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:28:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:28:43,579 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:28:43,580 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:28:43,581 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:28:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:28:43,592 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:43,597 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:28:43,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:28:43 BoogieIcfgContainer [2021-11-07 08:28:43,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:28:43,738 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:28:43,738 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:28:43,738 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:28:43,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:28:30" (3/4) ... [2021-11-07 08:28:43,744 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:28:43,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:28:43,746 INFO L168 Benchmark]: Toolchain (without parser) took 14493.88 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 73.2 MB in the beginning and 52.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2021-11-07 08:28:43,747 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 42.8 MB in the beginning and 42.8 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:28:43,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.22 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 61.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:28:43,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.93 ms. Allocated memory is still 98.6 MB. Free memory was 61.5 MB in the beginning and 59.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:28:43,749 INFO L168 Benchmark]: Boogie Preprocessor took 37.45 ms. Allocated memory is still 98.6 MB. Free memory was 59.7 MB in the beginning and 58.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:28:43,750 INFO L168 Benchmark]: RCFGBuilder took 514.45 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 45.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:28:43,751 INFO L168 Benchmark]: TraceAbstraction took 13514.68 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 45.3 MB in the beginning and 54.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:28:43,751 INFO L168 Benchmark]: Witness Printer took 6.43 ms. Allocated memory is still 136.3 MB. Free memory was 54.0 MB in the beginning and 52.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:28:43,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 42.8 MB in the beginning and 42.8 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.22 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 61.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.93 ms. Allocated memory is still 98.6 MB. Free memory was 61.5 MB in the beginning and 59.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.45 ms. Allocated memory is still 98.6 MB. Free memory was 59.7 MB in the beginning and 58.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 514.45 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 45.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13514.68 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 45.3 MB in the beginning and 54.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * Witness Printer took 6.43 ms. Allocated memory is still 136.3 MB. Free memory was 54.0 MB in the beginning and 52.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L125] a = __VERIFIER_nondet_uint() [L127] b = 234770789 [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 [L68] nb = (unsigned char)4 [L69] COND FALSE !(b3 == (unsigned char)0) [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 [L85] COND FALSE !(i == (unsigned char)1) [L86] COND FALSE !(i == (unsigned char)2) [L87] COND FALSE !(i == (unsigned char)3) [L89] COND TRUE i < nb [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 [L91] COND FALSE !(i == (unsigned char)1) [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND FALSE !(i < na) [L89] COND TRUE i < nb [L90] COND FALSE !(i == (unsigned char)0) [L91] COND TRUE i == (unsigned char)1 [L91] partial_sum = partial_sum + b1 [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)255)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND FALSE !(i < na) [L89] COND TRUE i < nb [L90] COND FALSE !(i == (unsigned char)0) [L91] COND FALSE !(i == (unsigned char)1) [L92] COND TRUE i == (unsigned char)2 [L92] partial_sum = partial_sum + b2 [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)255)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND FALSE !(i < na) [L89] COND TRUE i < nb [L90] COND FALSE !(i == (unsigned char)0) [L91] COND FALSE !(i == (unsigned char)1) [L92] COND FALSE !(i == (unsigned char)2) [L93] COND TRUE i == (unsigned char)3 [L93] partial_sum = partial_sum + b3 [L95] COND FALSE !(partial_sum > ((unsigned char)255)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum [L104] i = i + (unsigned char)1 [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L107] COND FALSE !(i < (unsigned char)4) [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; [L129] r = mp_add(a, b) [L24] COND TRUE !(cond) [L25] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.2s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 879 SDtfs, 1481 SDslu, 1284 SDs, 0 SdLazy, 2078 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 300 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=803occurred in iteration=15, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 2007 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 908 ConstructedInterpolants, 0 QuantifiedInterpolants, 3589 SizeOfPredicates, 12 NumberOfNonLiveVariables, 803 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 21 InterpolantComputations, 13 PerfectInterpolantSequences, 783/805 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 08:28:43,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY --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 de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:28:47,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:28:47,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:28:47,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:28:47,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:28:47,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:28:47,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:28:47,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:28:47,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:28:47,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:28:47,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:28:47,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:28:47,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:28:47,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:28:47,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:28:47,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:28:47,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:28:47,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:28:47,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:28:47,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:28:47,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:28:47,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:28:47,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:28:47,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:28:47,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:28:47,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:28:47,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:28:47,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:28:47,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:28:47,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:28:47,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:28:47,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:28:47,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:28:47,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:28:47,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:28:47,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:28:47,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:28:47,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:28:47,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:28:47,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:28:47,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:28:47,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-07 08:28:47,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:28:47,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:28:47,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:28:47,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:28:47,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:28:47,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:28:47,216 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:28:47,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:28:47,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:28:47,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:28:47,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:28:47,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:28:47,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:28:47,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:28:47,220 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 08:28:47,220 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 08:28:47,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:28:47,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:28:47,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:28:47,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:28:47,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:28:47,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:28:47,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:28:47,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:28:47,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:28:47,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:28:47,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:28:47,224 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 08:28:47,224 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 08:28:47,224 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:28:47,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:28:47,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:28:47,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:28:47,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 08:28:47,226 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-11-07 08:28:47,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:28:47,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:28:47,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:28:47,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:28:47,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:28:47,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-07 08:28:47,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/9881bf740/e3212b5cfccf48618f284fd49d9f68d9/FLAG0bdb22eea [2021-11-07 08:28:48,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:28:48,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-07 08:28:48,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/9881bf740/e3212b5cfccf48618f284fd49d9f68d9/FLAG0bdb22eea [2021-11-07 08:28:49,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/data/9881bf740/e3212b5cfccf48618f284fd49d9f68d9 [2021-11-07 08:28:49,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:28:49,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:28:49,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:28:49,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:28:49,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:28:49,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7804adab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49, skipping insertion in model container [2021-11-07 08:28:49,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:28:49,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:28:49,347 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_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-11-07 08:28:49,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:28:49,429 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:28:49,449 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_9b12daf2-6e16-45cd-963e-432fb83c2031/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-11-07 08:28:49,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:28:49,574 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:28:49,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49 WrapperNode [2021-11-07 08:28:49,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:28:49,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:28:49,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:28:49,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:28:49,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:28:49,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:28:49,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:28:49,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:28:49,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:28:49,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:28:49,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:28:49,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:28:49,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (1/1) ... [2021-11-07 08:28:49,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:28:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:49,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:28:49,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:28:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:28:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:28:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:28:49,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:28:50,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:28:50,319 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 08:28:50,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:28:50 BoogieIcfgContainer [2021-11-07 08:28:50,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:28:50,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:28:50,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:28:50,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:28:50,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:28:49" (1/3) ... [2021-11-07 08:28:50,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5241c1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:28:50, skipping insertion in model container [2021-11-07 08:28:50,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:28:49" (2/3) ... [2021-11-07 08:28:50,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5241c1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:28:50, skipping insertion in model container [2021-11-07 08:28:50,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:28:50" (3/3) ... [2021-11-07 08:28:50,333 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-11-07 08:28:50,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:28:50,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:28:50,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:28:50,418 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 [2021-11-07 08:28:50,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:28:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:28:50,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:50,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:50,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-07 08:28:50,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:50,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829860185] [2021-11-07 08:28:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:50,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:50,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:50,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:28:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:28:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:50,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:50,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:50,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829860185] [2021-11-07 08:28:50,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829860185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:50,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:50,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:28:50,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257946548] [2021-11-07 08:28:50,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:28:50,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:28:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:28:50,923 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:50,953 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-07 08:28:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:28:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:28:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:50,970 INFO L225 Difference]: With dead ends: 57 [2021-11-07 08:28:50,970 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:28:50,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:28:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:28:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 08:28:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-07 08:28:51,029 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-07 08:28:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:51,030 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-07 08:28:51,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-07 08:28:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:28:51,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:51,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:51,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:51,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:51,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-07 08:28:51,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:51,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266106197] [2021-11-07 08:28:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:51,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:51,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:51,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:28:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:28:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:51,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:51,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:51,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266106197] [2021-11-07 08:28:51,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266106197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:51,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:51,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:28:51,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308323797] [2021-11-07 08:28:51,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:28:51,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:28:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:28:51,617 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:52,246 INFO L93 Difference]: Finished difference Result 180 states and 315 transitions. [2021-11-07 08:28:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:28:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:28:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:52,257 INFO L225 Difference]: With dead ends: 180 [2021-11-07 08:28:52,258 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 08:28:52,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 08:28:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2021-11-07 08:28:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 96 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 152 transitions. [2021-11-07 08:28:52,305 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 152 transitions. Word has length 12 [2021-11-07 08:28:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 152 transitions. [2021-11-07 08:28:52,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 152 transitions. [2021-11-07 08:28:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:28:52,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:52,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:52,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:52,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1251593412, now seen corresponding path program 1 times [2021-11-07 08:28:52,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:52,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706713972] [2021-11-07 08:28:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:52,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:52,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:52,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:28:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:28:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:52,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:52,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706713972] [2021-11-07 08:28:52,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706713972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:52,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:52,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 08:28:52,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295157355] [2021-11-07 08:28:52,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:28:52,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:28:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:28:52,962 INFO L87 Difference]: Start difference. First operand 97 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:53,850 INFO L93 Difference]: Finished difference Result 251 states and 421 transitions. [2021-11-07 08:28:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:28:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:28:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:53,854 INFO L225 Difference]: With dead ends: 251 [2021-11-07 08:28:53,854 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 08:28:53,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:28:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 08:28:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-11-07 08:28:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5947368421052632) internal successors, (303), 190 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 303 transitions. [2021-11-07 08:28:53,898 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 303 transitions. Word has length 14 [2021-11-07 08:28:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:53,898 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 303 transitions. [2021-11-07 08:28:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 303 transitions. [2021-11-07 08:28:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:28:53,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:53,909 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:53,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:54,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:54,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2087887882, now seen corresponding path program 1 times [2021-11-07 08:28:54,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:54,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185544721] [2021-11-07 08:28:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:54,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:54,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:54,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:28:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:28:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:54,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:54,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185544721] [2021-11-07 08:28:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185544721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:54,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:54,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 08:28:54,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851010563] [2021-11-07 08:28:54,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:54,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:54,447 INFO L87 Difference]: Start difference. First operand 191 states and 303 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:54,659 INFO L93 Difference]: Finished difference Result 449 states and 722 transitions. [2021-11-07 08:28:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:28:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:28:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:54,663 INFO L225 Difference]: With dead ends: 449 [2021-11-07 08:28:54,663 INFO L226 Difference]: Without dead ends: 292 [2021-11-07 08:28:54,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-07 08:28:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 257. [2021-11-07 08:28:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.55078125) internal successors, (397), 256 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 397 transitions. [2021-11-07 08:28:54,721 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 397 transitions. Word has length 26 [2021-11-07 08:28:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:54,721 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 397 transitions. [2021-11-07 08:28:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 397 transitions. [2021-11-07 08:28:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:28:54,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:54,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:54,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 08:28:54,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:54,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 73987210, now seen corresponding path program 1 times [2021-11-07 08:28:54,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:54,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642747521] [2021-11-07 08:28:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:54,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:54,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:54,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:54,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:28:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:28:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:55,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:55,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:55,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642747521] [2021-11-07 08:28:55,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642747521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:55,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:55,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:28:55,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712752751] [2021-11-07 08:28:55,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:28:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:28:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:28:55,362 INFO L87 Difference]: Start difference. First operand 257 states and 397 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:55,808 INFO L93 Difference]: Finished difference Result 1005 states and 1558 transitions. [2021-11-07 08:28:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:28:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:28:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:55,815 INFO L225 Difference]: With dead ends: 1005 [2021-11-07 08:28:55,816 INFO L226 Difference]: Without dead ends: 784 [2021-11-07 08:28:55,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-07 08:28:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 636. [2021-11-07 08:28:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5181102362204724) internal successors, (964), 635 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 964 transitions. [2021-11-07 08:28:55,898 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 964 transitions. Word has length 26 [2021-11-07 08:28:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:55,899 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 964 transitions. [2021-11-07 08:28:55,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 964 transitions. [2021-11-07 08:28:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:28:55,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:55,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:55,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:56,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:56,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1742793183, now seen corresponding path program 1 times [2021-11-07 08:28:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:56,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902605581] [2021-11-07 08:28:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:56,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:56,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:56,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:28:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:28:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:56,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902605581] [2021-11-07 08:28:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902605581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:28:56,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:28:56,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 08:28:56,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542193033] [2021-11-07 08:28:56,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:28:56,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:28:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:56,491 INFO L87 Difference]: Start difference. First operand 636 states and 964 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:56,519 INFO L93 Difference]: Finished difference Result 652 states and 984 transitions. [2021-11-07 08:28:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:28:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:28:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:56,523 INFO L225 Difference]: With dead ends: 652 [2021-11-07 08:28:56,523 INFO L226 Difference]: Without dead ends: 279 [2021-11-07 08:28:56,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:28:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-07 08:28:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-11-07 08:28:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4676258992805755) internal successors, (408), 278 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 408 transitions. [2021-11-07 08:28:56,546 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 408 transitions. Word has length 28 [2021-11-07 08:28:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 408 transitions. [2021-11-07 08:28:56,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 408 transitions. [2021-11-07 08:28:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:28:56,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:56,552 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:56,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:56,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:56,768 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:56,769 INFO L85 PathProgramCache]: Analyzing trace with hash -711002843, now seen corresponding path program 1 times [2021-11-07 08:28:56,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:56,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642175788] [2021-11-07 08:28:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:56,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:56,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:56,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:28:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:56,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:28:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:57,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:57,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:57,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642175788] [2021-11-07 08:28:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642175788] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:57,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-07 08:28:57,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489743691] [2021-11-07 08:28:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:28:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:28:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:28:57,850 INFO L87 Difference]: Start difference. First operand 279 states and 408 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:58,165 INFO L93 Difference]: Finished difference Result 385 states and 559 transitions. [2021-11-07 08:28:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:28:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 08:28:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:58,169 INFO L225 Difference]: With dead ends: 385 [2021-11-07 08:28:58,169 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 08:28:58,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:28:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 08:28:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 280. [2021-11-07 08:28:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.4265232974910393) internal successors, (398), 279 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 398 transitions. [2021-11-07 08:28:58,186 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 398 transitions. Word has length 43 [2021-11-07 08:28:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:58,187 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 398 transitions. [2021-11-07 08:28:58,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 398 transitions. [2021-11-07 08:28:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:28:58,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:58,190 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:58,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:58,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:58,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -746049266, now seen corresponding path program 1 times [2021-11-07 08:28:58,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:58,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947865077] [2021-11-07 08:28:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:58,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:58,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:58,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:58,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:28:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:28:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:28:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:58,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:28:58,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947865077] [2021-11-07 08:28:58,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947865077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:28:58,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:58,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 08:28:58,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419265126] [2021-11-07 08:28:58,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:28:58,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:28:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:28:58,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:28:58,988 INFO L87 Difference]: Start difference. First operand 280 states and 398 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:59,298 INFO L93 Difference]: Finished difference Result 661 states and 995 transitions. [2021-11-07 08:28:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:28:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:28:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:59,303 INFO L225 Difference]: With dead ends: 661 [2021-11-07 08:28:59,303 INFO L226 Difference]: Without dead ends: 408 [2021-11-07 08:28:59,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:28:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-07 08:28:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 358. [2021-11-07 08:28:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3837535014005602) internal successors, (494), 357 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 494 transitions. [2021-11-07 08:28:59,326 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 494 transitions. Word has length 44 [2021-11-07 08:28:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 494 transitions. [2021-11-07 08:28:59,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 494 transitions. [2021-11-07 08:28:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:28:59,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:59,329 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:59,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:28:59,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2080233776, now seen corresponding path program 1 times [2021-11-07 08:28:59,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:28:59,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683818770] [2021-11-07 08:28:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:59,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:28:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:28:59,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:28:59,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 08:28:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:59,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:28:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:00,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:00,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:00,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683818770] [2021-11-07 08:29:00,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683818770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:00,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:00,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:29:00,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971769556] [2021-11-07 08:29:00,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:29:00,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:29:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:29:00,244 INFO L87 Difference]: Start difference. First operand 358 states and 494 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:00,665 INFO L93 Difference]: Finished difference Result 1260 states and 1753 transitions. [2021-11-07 08:29:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:29:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:29:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:00,675 INFO L225 Difference]: With dead ends: 1260 [2021-11-07 08:29:00,675 INFO L226 Difference]: Without dead ends: 930 [2021-11-07 08:29:00,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:29:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-07 08:29:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 538. [2021-11-07 08:29:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4059590316573556) internal successors, (755), 537 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 755 transitions. [2021-11-07 08:29:00,713 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 755 transitions. Word has length 44 [2021-11-07 08:29:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:00,714 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 755 transitions. [2021-11-07 08:29:00,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 755 transitions. [2021-11-07 08:29:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:29:00,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:00,718 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:00,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:00,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:00,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1822068338, now seen corresponding path program 1 times [2021-11-07 08:29:00,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159564230] [2021-11-07 08:29:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:00,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:00,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:00,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 08:29:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:29:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:01,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:01,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:01,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159564230] [2021-11-07 08:29:01,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159564230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:01,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:01,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:29:01,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949453035] [2021-11-07 08:29:01,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:29:01,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:29:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:29:01,791 INFO L87 Difference]: Start difference. First operand 538 states and 755 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:02,256 INFO L93 Difference]: Finished difference Result 1376 states and 1982 transitions. [2021-11-07 08:29:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:29:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:29:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:02,265 INFO L225 Difference]: With dead ends: 1376 [2021-11-07 08:29:02,265 INFO L226 Difference]: Without dead ends: 841 [2021-11-07 08:29:02,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:29:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-07 08:29:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 655. [2021-11-07 08:29:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.3333333333333333) internal successors, (872), 654 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 872 transitions. [2021-11-07 08:29:02,324 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 872 transitions. Word has length 44 [2021-11-07 08:29:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:02,324 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 872 transitions. [2021-11-07 08:29:02,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 872 transitions. [2021-11-07 08:29:02,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:29:02,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:02,328 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:02,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:02,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:02,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 1 times [2021-11-07 08:29:02,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:02,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147484400] [2021-11-07 08:29:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:02,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:02,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:02,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 08:29:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:29:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:29:03,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:29:03,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:03,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147484400] [2021-11-07 08:29:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147484400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:03,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:03,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 08:29:03,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132068663] [2021-11-07 08:29:03,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:29:03,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:29:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:29:03,452 INFO L87 Difference]: Start difference. First operand 655 states and 872 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:03,791 INFO L93 Difference]: Finished difference Result 1545 states and 1975 transitions. [2021-11-07 08:29:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:29:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:29:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:03,799 INFO L225 Difference]: With dead ends: 1545 [2021-11-07 08:29:03,799 INFO L226 Difference]: Without dead ends: 918 [2021-11-07 08:29:03,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:29:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-07 08:29:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 564. [2021-11-07 08:29:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.2788632326820604) internal successors, (720), 563 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 720 transitions. [2021-11-07 08:29:03,834 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 720 transitions. Word has length 70 [2021-11-07 08:29:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:03,835 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 720 transitions. [2021-11-07 08:29:03,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 720 transitions. [2021-11-07 08:29:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:29:03,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:03,838 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:03,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:04,059 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-11-07 08:29:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:04,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351934701] [2021-11-07 08:29:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:29:04,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:04,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:04,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 08:29:04,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:29:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:29:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:14,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:14,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351934701] [2021-11-07 08:29:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351934701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:14,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:14,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-07 08:29:14,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770453395] [2021-11-07 08:29:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:29:14,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:29:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:29:14,720 INFO L87 Difference]: Start difference. First operand 564 states and 720 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:34,415 INFO L93 Difference]: Finished difference Result 1384 states and 1695 transitions. [2021-11-07 08:29:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 08:29:34,416 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:29:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:34,425 INFO L225 Difference]: With dead ends: 1384 [2021-11-07 08:29:34,425 INFO L226 Difference]: Without dead ends: 1267 [2021-11-07 08:29:34,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2018, Invalid=9972, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 08:29:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-07 08:29:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 762. [2021-11-07 08:29:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.2772667542706964) internal successors, (972), 761 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 972 transitions. [2021-11-07 08:29:34,487 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 972 transitions. Word has length 70 [2021-11-07 08:29:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 972 transitions. [2021-11-07 08:29:34,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 972 transitions. [2021-11-07 08:29:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:29:34,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:34,492 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:34,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:34,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -247756884, now seen corresponding path program 1 times [2021-11-07 08:29:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:34,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766333183] [2021-11-07 08:29:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:34,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:34,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:34,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 08:29:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:29:35,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:29:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:29:36,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:36,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766333183] [2021-11-07 08:29:36,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766333183] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:36,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:36,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-07 08:29:36,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444003242] [2021-11-07 08:29:36,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:29:36,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:29:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:29:36,121 INFO L87 Difference]: Start difference. First operand 762 states and 972 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:36,412 INFO L93 Difference]: Finished difference Result 988 states and 1239 transitions. [2021-11-07 08:29:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:29:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:29:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:36,419 INFO L225 Difference]: With dead ends: 988 [2021-11-07 08:29:36,420 INFO L226 Difference]: Without dead ends: 848 [2021-11-07 08:29:36,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:29:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-07 08:29:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 759. [2021-11-07 08:29:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.2770448548812665) internal successors, (968), 758 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 968 transitions. [2021-11-07 08:29:36,484 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 968 transitions. Word has length 70 [2021-11-07 08:29:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:36,484 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 968 transitions. [2021-11-07 08:29:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 968 transitions. [2021-11-07 08:29:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:29:36,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:36,489 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:36,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:36,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 946149333, now seen corresponding path program 1 times [2021-11-07 08:29:36,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:36,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517587160] [2021-11-07 08:29:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:36,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:36,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 08:29:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:29:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:29:37,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:29:38,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:38,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517587160] [2021-11-07 08:29:38,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517587160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:38,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:38,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:29:38,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547098102] [2021-11-07 08:29:38,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:29:38,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:29:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:29:38,384 INFO L87 Difference]: Start difference. First operand 759 states and 968 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:39,746 INFO L93 Difference]: Finished difference Result 1243 states and 1584 transitions. [2021-11-07 08:29:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:29:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:29:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:39,753 INFO L225 Difference]: With dead ends: 1243 [2021-11-07 08:29:39,753 INFO L226 Difference]: Without dead ends: 893 [2021-11-07 08:29:39,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:29:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-07 08:29:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 761. [2021-11-07 08:29:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.2736842105263158) internal successors, (968), 760 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 968 transitions. [2021-11-07 08:29:39,814 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 968 transitions. Word has length 72 [2021-11-07 08:29:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:39,814 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 968 transitions. [2021-11-07 08:29:39,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 968 transitions. [2021-11-07 08:29:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:29:39,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:39,823 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:39,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:40,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:29:40,044 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:40,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2021-11-07 08:29:40,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:29:40,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138711373] [2021-11-07 08:29:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:40,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:29:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:29:40,048 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:29:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 08:29:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:29:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:46,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:29:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:52,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:29:52,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138711373] [2021-11-07 08:29:52,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138711373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:29:52,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:52,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-07 08:29:52,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008014414] [2021-11-07 08:29:52,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:29:52,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:29:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:29:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:29:52,227 INFO L87 Difference]: Start difference. First operand 761 states and 968 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:44,882 INFO L93 Difference]: Finished difference Result 2416 states and 2941 transitions. [2021-11-07 08:30:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-07 08:30:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:30:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:44,897 INFO L225 Difference]: With dead ends: 2416 [2021-11-07 08:30:44,897 INFO L226 Difference]: Without dead ends: 2261 [2021-11-07 08:30:44,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9864 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=4861, Invalid=31049, Unknown=0, NotChecked=0, Total=35910 [2021-11-07 08:30:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-11-07 08:30:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1321. [2021-11-07 08:30:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.268181818181818) internal successors, (1674), 1320 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1674 transitions. [2021-11-07 08:30:45,044 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1674 transitions. Word has length 74 [2021-11-07 08:30:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1674 transitions. [2021-11-07 08:30:45,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1674 transitions. [2021-11-07 08:30:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:30:45,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:45,049 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:45,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:45,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:30:45,267 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2021-11-07 08:30:45,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:30:45,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089235871] [2021-11-07 08:30:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:45,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:30:45,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:30:45,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:30:45,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 08:30:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:30:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:30:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:51,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:30:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:56,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:30:56,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089235871] [2021-11-07 08:30:56,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089235871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:30:56,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:30:56,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-07 08:30:56,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723489419] [2021-11-07 08:30:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:30:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:30:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:30:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:30:56,012 INFO L87 Difference]: Start difference. First operand 1321 states and 1674 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:25,245 INFO L93 Difference]: Finished difference Result 3162 states and 3928 transitions. [2021-11-07 08:31:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 08:31:25,247 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:31:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:25,261 INFO L225 Difference]: With dead ends: 3162 [2021-11-07 08:31:25,261 INFO L226 Difference]: Without dead ends: 2459 [2021-11-07 08:31:25,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4116 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=2322, Invalid=15768, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 08:31:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-11-07 08:31:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1519. [2021-11-07 08:31:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 1.272068511198946) internal successors, (1931), 1518 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1931 transitions. [2021-11-07 08:31:25,394 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1931 transitions. Word has length 74 [2021-11-07 08:31:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 1931 transitions. [2021-11-07 08:31:25,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1931 transitions. [2021-11-07 08:31:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:31:25,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:25,399 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:25,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:25,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:31:25,611 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1420916641, now seen corresponding path program 1 times [2021-11-07 08:31:25,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:31:25,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467596581] [2021-11-07 08:31:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:31:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:31:25,615 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:31:25,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 08:31:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:26,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:31:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:27,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:31:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:27,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:31:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467596581] [2021-11-07 08:31:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467596581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:31:27,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-07 08:31:27,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366770549] [2021-11-07 08:31:27,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:31:27,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:31:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:31:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:31:27,664 INFO L87 Difference]: Start difference. First operand 1519 states and 1931 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:28,838 INFO L93 Difference]: Finished difference Result 6185 states and 8544 transitions. [2021-11-07 08:31:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:31:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:31:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:28,853 INFO L225 Difference]: With dead ends: 6185 [2021-11-07 08:31:28,854 INFO L226 Difference]: Without dead ends: 3214 [2021-11-07 08:31:28,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:31:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-07 08:31:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2600. [2021-11-07 08:31:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 1.1723739899961523) internal successors, (3047), 2599 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3047 transitions. [2021-11-07 08:31:29,097 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3047 transitions. Word has length 76 [2021-11-07 08:31:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:29,097 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 3047 transitions. [2021-11-07 08:31:29,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3047 transitions. [2021-11-07 08:31:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:31:29,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:29,100 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:29,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:29,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:31:29,315 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 881251465, now seen corresponding path program 1 times [2021-11-07 08:31:29,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:31:29,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270040892] [2021-11-07 08:31:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:29,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:31:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:31:29,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:31:29,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 08:31:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:31:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:36,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:31:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:43,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:31:43,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270040892] [2021-11-07 08:31:43,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270040892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:31:43,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:43,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-07 08:31:43,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035554657] [2021-11-07 08:31:43,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:31:43,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:31:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:31:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:31:43,688 INFO L87 Difference]: Start difference. First operand 2600 states and 3047 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:46,692 INFO L93 Difference]: Finished difference Result 4105 states and 4762 transitions. [2021-11-07 08:32:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-07 08:32:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:32:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:46,717 INFO L225 Difference]: With dead ends: 4105 [2021-11-07 08:32:46,718 INFO L226 Difference]: Without dead ends: 3853 [2021-11-07 08:32:46,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9241 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=4295, Invalid=30487, Unknown=0, NotChecked=0, Total=34782 [2021-11-07 08:32:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-11-07 08:32:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3090. [2021-11-07 08:32:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 1.1699579151829071) internal successors, (3614), 3089 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 3614 transitions. [2021-11-07 08:32:47,056 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 3614 transitions. Word has length 77 [2021-11-07 08:32:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:47,056 INFO L470 AbstractCegarLoop]: Abstraction has 3090 states and 3614 transitions. [2021-11-07 08:32:47,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 3614 transitions. [2021-11-07 08:32:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:32:47,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:47,060 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:47,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:47,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:32:47,274 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1269946569, now seen corresponding path program 2 times [2021-11-07 08:32:47,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:32:47,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354171079] [2021-11-07 08:32:47,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:32:47,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:32:47,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:32:47,277 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:32:47,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 08:32:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:32:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:32:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:32:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:55,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:33:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:01,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:33:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354171079] [2021-11-07 08:33:01,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354171079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:33:01,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:01,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-07 08:33:01,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280432374] [2021-11-07 08:33:01,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:33:01,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:33:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:33:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:33:01,855 INFO L87 Difference]: Start difference. First operand 3090 states and 3614 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:14,086 INFO L93 Difference]: Finished difference Result 5751 states and 6701 transitions. [2021-11-07 08:34:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-11-07 08:34:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:34:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:14,107 INFO L225 Difference]: With dead ends: 5751 [2021-11-07 08:34:14,108 INFO L226 Difference]: Without dead ends: 5004 [2021-11-07 08:34:14,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14675 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=6030, Invalid=42590, Unknown=0, NotChecked=0, Total=48620 [2021-11-07 08:34:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-11-07 08:34:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4056. [2021-11-07 08:34:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.174845869297164) internal successors, (4764), 4055 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 4764 transitions. [2021-11-07 08:34:14,457 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 4764 transitions. Word has length 77 [2021-11-07 08:34:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:14,458 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 4764 transitions. [2021-11-07 08:34:14,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 4764 transitions. [2021-11-07 08:34:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:34:14,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:14,461 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:14,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:34:14,675 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1690097737, now seen corresponding path program 3 times [2021-11-07 08:34:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:34:14,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897455645] [2021-11-07 08:34:14,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:34:14,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:34:14,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:34:14,678 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:34:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 08:34:16,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:34:16,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:34:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:21,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:34:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:27,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:34:27,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897455645] [2021-11-07 08:34:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897455645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:34:27,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:27,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-07 08:34:27,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849818762] [2021-11-07 08:34:27,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 08:34:27,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:34:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 08:34:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:34:27,776 INFO L87 Difference]: Start difference. First operand 4056 states and 4764 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:34,655 INFO L93 Difference]: Finished difference Result 8504 states and 9945 transitions. [2021-11-07 08:35:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-07 08:35:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:35:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:34,685 INFO L225 Difference]: With dead ends: 8504 [2021-11-07 08:35:34,685 INFO L226 Difference]: Without dead ends: 6787 [2021-11-07 08:35:34,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14192 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=6816, Invalid=40490, Unknown=0, NotChecked=0, Total=47306 [2021-11-07 08:35:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2021-11-07 08:35:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 4577. [2021-11-07 08:35:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.1748251748251748) internal successors, (5376), 4576 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 5376 transitions. [2021-11-07 08:35:35,069 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 5376 transitions. Word has length 77 [2021-11-07 08:35:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:35,070 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 5376 transitions. [2021-11-07 08:35:35,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 5376 transitions. [2021-11-07 08:35:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:35:35,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:35,073 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:35,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 08:35:35,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:35:35,292 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-11-07 08:35:35,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:35:35,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713710600] [2021-11-07 08:35:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:35,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:35:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:35:35,296 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:35:35,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 08:35:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:35:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:35:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:49,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:35:49,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713710600] [2021-11-07 08:35:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713710600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:35:49,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-07 08:35:49,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029972667] [2021-11-07 08:35:49,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:35:49,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:35:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:35:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:35:49,808 INFO L87 Difference]: Start difference. First operand 4577 states and 5376 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:36,518 INFO L93 Difference]: Finished difference Result 7873 states and 9153 transitions. [2021-11-07 08:37:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2021-11-07 08:37:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 08:37:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:36,530 INFO L225 Difference]: With dead ends: 7873 [2021-11-07 08:37:36,530 INFO L226 Difference]: Without dead ends: 7629 [2021-11-07 08:37:36,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22488 ImplicationChecksByTransitivity, 98.3s TimeCoverageRelationStatistics Valid=6744, Invalid=61116, Unknown=0, NotChecked=0, Total=67860 [2021-11-07 08:37:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-11-07 08:37:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5489. [2021-11-07 08:37:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5488 states have (on average 1.1701895043731778) internal successors, (6422), 5488 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 6422 transitions. [2021-11-07 08:37:36,959 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 6422 transitions. Word has length 80 [2021-11-07 08:37:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:36,959 INFO L470 AbstractCegarLoop]: Abstraction has 5489 states and 6422 transitions. [2021-11-07 08:37:36,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 6422 transitions. [2021-11-07 08:37:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:37:36,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:36,964 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:36,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 08:37:37,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:37:37,166 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:37:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-11-07 08:37:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:37:37,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554147198] [2021-11-07 08:37:37,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:37:37,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:37:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:37:37,170 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:37:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 08:37:39,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:37:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:37:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:44,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:37:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:51,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:37:51,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554147198] [2021-11-07 08:37:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554147198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:37:51,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:51,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-07 08:37:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786999375] [2021-11-07 08:37:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:37:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:37:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:37:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:37:51,770 INFO L87 Difference]: Start difference. First operand 5489 states and 6422 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:00,766 INFO L93 Difference]: Finished difference Result 10928 states and 12702 transitions. [2021-11-07 08:40:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2021-11-07 08:40:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 08:40:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:00,784 INFO L225 Difference]: With dead ends: 10928 [2021-11-07 08:40:00,784 INFO L226 Difference]: Without dead ends: 8236 [2021-11-07 08:40:00,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23813 ImplicationChecksByTransitivity, 111.7s TimeCoverageRelationStatistics Valid=6087, Invalid=64403, Unknown=0, NotChecked=0, Total=70490 [2021-11-07 08:40:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-11-07 08:40:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 6197. [2021-11-07 08:40:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6197 states, 6196 states have (on average 1.1676888315041962) internal successors, (7235), 6196 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 7235 transitions. [2021-11-07 08:40:01,340 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 7235 transitions. Word has length 80 [2021-11-07 08:40:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:01,341 INFO L470 AbstractCegarLoop]: Abstraction has 6197 states and 7235 transitions. [2021-11-07 08:40:01,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 7235 transitions. [2021-11-07 08:40:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:40:01,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:01,348 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:01,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:01,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:01,562 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash -825823845, now seen corresponding path program 3 times [2021-11-07 08:40:01,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:40:01,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592281204] [2021-11-07 08:40:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:40:01,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:40:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:40:01,564 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:40:01,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b12daf2-6e16-45cd-963e-432fb83c2031/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 08:40:04,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:40:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:40:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:10,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:40:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:17,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:40:17,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592281204] [2021-11-07 08:40:17,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592281204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:40:17,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:17,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-07 08:40:17,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936749434] [2021-11-07 08:40:17,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:40:17,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:40:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:40:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:40:17,607 INFO L87 Difference]: Start difference. First operand 6197 states and 7235 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)