./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX --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 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:31:01,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:31:01,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:31:01,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:31:01,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:31:01,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:31:01,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:31:01,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:31:01,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:31:01,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:31:01,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:31:01,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:31:01,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:31:01,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:31:01,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:31:01,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:31:01,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:31:01,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:31:01,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:31:01,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:31:01,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:31:01,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:31:01,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:31:01,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:31:01,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:31:01,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:31:01,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:31:01,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:31:01,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:31:01,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:31:01,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:31:01,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:31:01,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:31:01,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:31:01,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:31:01,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:31:01,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:31:01,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:31:01,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:31:01,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:31:01,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:31:01,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:31:01,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:31:01,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:31:01,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:31:01,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:31:01,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:31:01,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:31:01,185 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:31:01,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:31:01,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:31:01,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:31:01,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:31:01,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:31:01,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:31:01,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:31:01,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:31:01,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:31:01,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:31:01,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:31:01,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:31:01,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:31:01,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:31:01,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:31:01,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:01,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:31:01,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:31:01,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:31:01,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:31:01,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:31:01,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:31:01,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:31:01,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:31:01,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:31:01,190 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_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c [2021-11-09 08:31:01,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:31:01,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:31:01,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:31:01,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:31:01,539 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:31:01,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2021-11-09 08:31:01,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/data/e9626189c/4ff64b6a62f444c8a848346004b0a4ba/FLAGa86cd71ad [2021-11-09 08:31:02,335 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:31:02,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2021-11-09 08:31:02,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/data/e9626189c/4ff64b6a62f444c8a848346004b0a4ba/FLAGa86cd71ad [2021-11-09 08:31:02,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/data/e9626189c/4ff64b6a62f444c8a848346004b0a4ba [2021-11-09 08:31:02,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:31:02,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:31:02,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:02,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:31:02,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:31:02,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:02" (1/1) ... [2021-11-09 08:31:02,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fec2d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:02, skipping insertion in model container [2021-11-09 08:31:02,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:02" (1/1) ... [2021-11-09 08:31:02,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:31:02,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:31:03,379 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_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2021-11-09 08:31:03,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:03,443 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:31:03,729 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_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2021-11-09 08:31:03,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:03,766 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:31:03,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03 WrapperNode [2021-11-09 08:31:03,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:03,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:03,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:31:03,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:31:03,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:03,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:03,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:03,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:31:03,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:31:03,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:31:03,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:03,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:03,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:03,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:04,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:04,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:04,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:04,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:31:04,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:31:04,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:31:04,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:31:04,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (1/1) ... [2021-11-09 08:31:04,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:04,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:31:04,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:31:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:31:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:31:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:31:04,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:31:06,420 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:31:06,420 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 08:31:06,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:06 BoogieIcfgContainer [2021-11-09 08:31:06,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:31:06,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:31:06,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:31:06,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:31:06,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:31:02" (1/3) ... [2021-11-09 08:31:06,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2655d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:06, skipping insertion in model container [2021-11-09 08:31:06,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:03" (2/3) ... [2021-11-09 08:31:06,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2655d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:06, skipping insertion in model container [2021-11-09 08:31:06,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:06" (3/3) ... [2021-11-09 08:31:06,435 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2021-11-09 08:31:06,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:31:06,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:31:06,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:31:06,526 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 [2021-11-09 08:31:06,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:31:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-09 08:31:06,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:06,580 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, 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, 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, 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, 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, 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] [2021-11-09 08:31:06,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash -448621317, now seen corresponding path program 1 times [2021-11-09 08:31:06,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:06,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185727477] [2021-11-09 08:31:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:06,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:07,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:07,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185727477] [2021-11-09 08:31:07,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185727477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:07,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:07,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:07,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344088724] [2021-11-09 08:31:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:07,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:07,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:07,412 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:08,863 INFO L93 Difference]: Finished difference Result 816 states and 1453 transitions. [2021-11-09 08:31:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2021-11-09 08:31:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:08,885 INFO L225 Difference]: With dead ends: 816 [2021-11-09 08:31:08,885 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 08:31:08,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 08:31:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-11-09 08:31:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.621923937360179) internal successors, (725), 447 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 725 transitions. [2021-11-09 08:31:08,987 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 725 transitions. Word has length 193 [2021-11-09 08:31:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:08,994 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 725 transitions. [2021-11-09 08:31:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 725 transitions. [2021-11-09 08:31:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-09 08:31:09,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:09,022 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1] [2021-11-09 08:31:09,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:31:09,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1501387221, now seen corresponding path program 1 times [2021-11-09 08:31:09,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:09,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988855100] [2021-11-09 08:31:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:09,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:09,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:09,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988855100] [2021-11-09 08:31:09,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988855100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:09,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:09,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:09,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569859178] [2021-11-09 08:31:09,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:09,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:09,153 INFO L87 Difference]: Start difference. First operand 448 states and 725 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:10,019 INFO L93 Difference]: Finished difference Result 1318 states and 2139 transitions. [2021-11-09 08:31:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2021-11-09 08:31:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:10,026 INFO L225 Difference]: With dead ends: 1318 [2021-11-09 08:31:10,026 INFO L226 Difference]: Without dead ends: 872 [2021-11-09 08:31:10,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-11-09 08:31:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 868. [2021-11-09 08:31:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5271049596309112) internal successors, (1324), 867 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1324 transitions. [2021-11-09 08:31:10,079 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1324 transitions. Word has length 198 [2021-11-09 08:31:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1324 transitions. [2021-11-09 08:31:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1324 transitions. [2021-11-09 08:31:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 08:31:10,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:10,085 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:31:10,086 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1711270716, now seen corresponding path program 1 times [2021-11-09 08:31:10,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:10,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647347144] [2021-11-09 08:31:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:10,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:10,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:10,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647347144] [2021-11-09 08:31:10,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647347144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:10,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:10,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:10,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68957965] [2021-11-09 08:31:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:10,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:10,247 INFO L87 Difference]: Start difference. First operand 868 states and 1324 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:11,297 INFO L93 Difference]: Finished difference Result 2566 states and 3931 transitions. [2021-11-09 08:31:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:11,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-09 08:31:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:11,310 INFO L225 Difference]: With dead ends: 2566 [2021-11-09 08:31:11,310 INFO L226 Difference]: Without dead ends: 1700 [2021-11-09 08:31:11,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-11-09 08:31:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1684. [2021-11-09 08:31:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.4979203802733214) internal successors, (2521), 1683 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2521 transitions. [2021-11-09 08:31:11,369 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2521 transitions. Word has length 201 [2021-11-09 08:31:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2521 transitions. [2021-11-09 08:31:11,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2521 transitions. [2021-11-09 08:31:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 08:31:11,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:11,377 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:11,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:31:11,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1165439585, now seen corresponding path program 1 times [2021-11-09 08:31:11,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:11,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906301306] [2021-11-09 08:31:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:11,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:11,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:11,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906301306] [2021-11-09 08:31:11,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906301306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:11,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:11,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:11,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757863127] [2021-11-09 08:31:11,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:11,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:11,472 INFO L87 Difference]: Start difference. First operand 1684 states and 2521 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:12,394 INFO L93 Difference]: Finished difference Result 4188 states and 6247 transitions. [2021-11-09 08:31:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-09 08:31:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:12,410 INFO L225 Difference]: With dead ends: 4188 [2021-11-09 08:31:12,411 INFO L226 Difference]: Without dead ends: 2506 [2021-11-09 08:31:12,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-11-09 08:31:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2505. [2021-11-09 08:31:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 1.4700479233226837) internal successors, (3681), 2504 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3681 transitions. [2021-11-09 08:31:12,511 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3681 transitions. Word has length 203 [2021-11-09 08:31:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:12,511 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 3681 transitions. [2021-11-09 08:31:12,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3681 transitions. [2021-11-09 08:31:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 08:31:12,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:12,520 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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] [2021-11-09 08:31:12,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:31:12,521 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2070037263, now seen corresponding path program 1 times [2021-11-09 08:31:12,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:12,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80307239] [2021-11-09 08:31:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:12,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80307239] [2021-11-09 08:31:12,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80307239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:12,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:12,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:12,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125901114] [2021-11-09 08:31:12,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:12,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:12,829 INFO L87 Difference]: Start difference. First operand 2505 states and 3681 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:13,987 INFO L93 Difference]: Finished difference Result 5325 states and 7890 transitions. [2021-11-09 08:31:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-09 08:31:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:14,003 INFO L225 Difference]: With dead ends: 5325 [2021-11-09 08:31:14,004 INFO L226 Difference]: Without dead ends: 2474 [2021-11-09 08:31:14,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-11-09 08:31:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2474. [2021-11-09 08:31:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 1.3489688637282653) internal successors, (3336), 2473 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3336 transitions. [2021-11-09 08:31:14,081 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3336 transitions. Word has length 208 [2021-11-09 08:31:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 3336 transitions. [2021-11-09 08:31:14,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3336 transitions. [2021-11-09 08:31:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-09 08:31:14,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:14,089 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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] [2021-11-09 08:31:14,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:31:14,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 870804182, now seen corresponding path program 1 times [2021-11-09 08:31:14,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:14,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814085334] [2021-11-09 08:31:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:14,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:14,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:14,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814085334] [2021-11-09 08:31:14,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814085334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:14,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:14,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:14,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231631184] [2021-11-09 08:31:14,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:14,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:14,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:14,178 INFO L87 Difference]: Start difference. First operand 2474 states and 3336 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:15,090 INFO L93 Difference]: Finished difference Result 7383 states and 9960 transitions. [2021-11-09 08:31:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 210 [2021-11-09 08:31:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:15,122 INFO L225 Difference]: With dead ends: 7383 [2021-11-09 08:31:15,123 INFO L226 Difference]: Without dead ends: 4911 [2021-11-09 08:31:15,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-09 08:31:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4098. [2021-11-09 08:31:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.2472540883573346) internal successors, (5110), 4097 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5110 transitions. [2021-11-09 08:31:15,295 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5110 transitions. Word has length 210 [2021-11-09 08:31:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:15,296 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 5110 transitions. [2021-11-09 08:31:15,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5110 transitions. [2021-11-09 08:31:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-09 08:31:15,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:15,307 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:15,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:31:15,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2139349419, now seen corresponding path program 1 times [2021-11-09 08:31:15,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:15,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794636819] [2021-11-09 08:31:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:15,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:15,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794636819] [2021-11-09 08:31:15,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794636819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:15,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:15,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:15,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824248326] [2021-11-09 08:31:15,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:15,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:15,459 INFO L87 Difference]: Start difference. First operand 4098 states and 5110 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:16,421 INFO L93 Difference]: Finished difference Result 10653 states and 13297 transitions. [2021-11-09 08:31:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-11-09 08:31:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:16,462 INFO L225 Difference]: With dead ends: 10653 [2021-11-09 08:31:16,463 INFO L226 Difference]: Without dead ends: 6557 [2021-11-09 08:31:16,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6557 states. [2021-11-09 08:31:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6557 to 6554. [2021-11-09 08:31:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6554 states, 6553 states have (on average 1.2455363955440257) internal successors, (8162), 6553 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6554 states to 6554 states and 8162 transitions. [2021-11-09 08:31:16,656 INFO L78 Accepts]: Start accepts. Automaton has 6554 states and 8162 transitions. Word has length 221 [2021-11-09 08:31:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:16,658 INFO L470 AbstractCegarLoop]: Abstraction has 6554 states and 8162 transitions. [2021-11-09 08:31:16,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6554 states and 8162 transitions. [2021-11-09 08:31:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-09 08:31:16,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:16,673 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:16,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:31:16,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1439953932, now seen corresponding path program 1 times [2021-11-09 08:31:16,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:16,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225720099] [2021-11-09 08:31:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:16,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:17,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:17,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225720099] [2021-11-09 08:31:17,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225720099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:17,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:17,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:17,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801083477] [2021-11-09 08:31:17,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:17,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:17,071 INFO L87 Difference]: Start difference. First operand 6554 states and 8162 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:18,609 INFO L93 Difference]: Finished difference Result 17067 states and 21123 transitions. [2021-11-09 08:31:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-09 08:31:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:18,667 INFO L225 Difference]: With dead ends: 17067 [2021-11-09 08:31:18,667 INFO L226 Difference]: Without dead ends: 9819 [2021-11-09 08:31:18,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9819 states. [2021-11-09 08:31:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9819 to 9818. [2021-11-09 08:31:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9818 states, 9817 states have (on average 1.227666293164918) internal successors, (12052), 9817 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9818 states to 9818 states and 12052 transitions. [2021-11-09 08:31:18,922 INFO L78 Accepts]: Start accepts. Automaton has 9818 states and 12052 transitions. Word has length 224 [2021-11-09 08:31:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 9818 states and 12052 transitions. [2021-11-09 08:31:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9818 states and 12052 transitions. [2021-11-09 08:31:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-09 08:31:18,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:18,942 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:18,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:31:18,943 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash -148044918, now seen corresponding path program 1 times [2021-11-09 08:31:18,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:18,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172893500] [2021-11-09 08:31:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:18,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:19,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:19,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172893500] [2021-11-09 08:31:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172893500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:19,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567471349] [2021-11-09 08:31:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:19,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:19,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:19,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:31:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 08:31:20,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567471349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:20,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-09 08:31:20,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437624244] [2021-11-09 08:31:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:20,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:20,169 INFO L87 Difference]: Start difference. First operand 9818 states and 12052 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:21,153 INFO L93 Difference]: Finished difference Result 29410 states and 36110 transitions. [2021-11-09 08:31:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 228 [2021-11-09 08:31:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:21,192 INFO L225 Difference]: With dead ends: 29410 [2021-11-09 08:31:21,192 INFO L226 Difference]: Without dead ends: 19594 [2021-11-09 08:31:21,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19594 states. [2021-11-09 08:31:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19594 to 19592. [2021-11-09 08:31:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 1.2013679750906028) internal successors, (23536), 19591 states have internal predecessors, (23536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 23536 transitions. [2021-11-09 08:31:21,602 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 23536 transitions. Word has length 228 [2021-11-09 08:31:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 23536 transitions. [2021-11-09 08:31:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 23536 transitions. [2021-11-09 08:31:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-09 08:31:21,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:21,627 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:21,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:21,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:21,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1990916425, now seen corresponding path program 1 times [2021-11-09 08:31:21,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:21,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696915775] [2021-11-09 08:31:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:21,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:21,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:21,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696915775] [2021-11-09 08:31:21,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696915775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:21,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158277644] [2021-11-09 08:31:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:21,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:21,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:21,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:31:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 08:31:22,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158277644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:22,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:22,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-09 08:31:22,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695722830] [2021-11-09 08:31:22,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:22,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:22,932 INFO L87 Difference]: Start difference. First operand 19592 states and 23536 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:23,816 INFO L93 Difference]: Finished difference Result 39191 states and 47086 transitions. [2021-11-09 08:31:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 231 [2021-11-09 08:31:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:23,859 INFO L225 Difference]: With dead ends: 39191 [2021-11-09 08:31:23,859 INFO L226 Difference]: Without dead ends: 19601 [2021-11-09 08:31:23,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-11-09 08:31:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 19592. [2021-11-09 08:31:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 1.1948343627175744) internal successors, (23408), 19591 states have internal predecessors, (23408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 23408 transitions. [2021-11-09 08:31:24,326 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 23408 transitions. Word has length 231 [2021-11-09 08:31:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:24,327 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 23408 transitions. [2021-11-09 08:31:24,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 23408 transitions. [2021-11-09 08:31:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-09 08:31:24,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:24,358 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:24,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:24,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:31:24,575 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1427075997, now seen corresponding path program 1 times [2021-11-09 08:31:24,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:24,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978368081] [2021-11-09 08:31:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:24,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 08:31:24,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:24,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978368081] [2021-11-09 08:31:24,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978368081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:24,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156668534] [2021-11-09 08:31:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:24,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:24,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:24,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:31:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:25,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:25,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156668534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:25,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:25,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-09 08:31:25,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454886541] [2021-11-09 08:31:25,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:25,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:25,697 INFO L87 Difference]: Start difference. First operand 19592 states and 23408 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:26,645 INFO L93 Difference]: Finished difference Result 39188 states and 46824 transitions. [2021-11-09 08:31:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 259 [2021-11-09 08:31:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:26,785 INFO L225 Difference]: With dead ends: 39188 [2021-11-09 08:31:26,786 INFO L226 Difference]: Without dead ends: 19598 [2021-11-09 08:31:26,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19598 states. [2021-11-09 08:31:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19598 to 19592. [2021-11-09 08:31:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 1.125363687407483) internal successors, (22047), 19591 states have internal predecessors, (22047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 22047 transitions. [2021-11-09 08:31:27,114 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 22047 transitions. Word has length 259 [2021-11-09 08:31:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:27,114 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 22047 transitions. [2021-11-09 08:31:27,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 22047 transitions. [2021-11-09 08:31:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-09 08:31:27,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:27,139 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:27,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:27,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:31:27,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash -803807727, now seen corresponding path program 2 times [2021-11-09 08:31:27,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:27,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116791340] [2021-11-09 08:31:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 08:31:27,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:27,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116791340] [2021-11-09 08:31:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116791340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:27,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200484633] [2021-11-09 08:31:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:27,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:27,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:27,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:31:28,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:31:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200484633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:28,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-09 08:31:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324329972] [2021-11-09 08:31:28,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:28,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:28,760 INFO L87 Difference]: Start difference. First operand 19592 states and 22047 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:29,498 INFO L93 Difference]: Finished difference Result 38974 states and 43806 transitions. [2021-11-09 08:31:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 259 [2021-11-09 08:31:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:29,613 INFO L225 Difference]: With dead ends: 38974 [2021-11-09 08:31:29,613 INFO L226 Difference]: Without dead ends: 19384 [2021-11-09 08:31:29,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19384 states. [2021-11-09 08:31:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19384 to 19378. [2021-11-09 08:31:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19378 states, 19377 states have (on average 1.094493471641637) internal successors, (21208), 19377 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19378 states to 19378 states and 21208 transitions. [2021-11-09 08:31:29,918 INFO L78 Accepts]: Start accepts. Automaton has 19378 states and 21208 transitions. Word has length 259 [2021-11-09 08:31:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:29,919 INFO L470 AbstractCegarLoop]: Abstraction has 19378 states and 21208 transitions. [2021-11-09 08:31:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19378 states and 21208 transitions. [2021-11-09 08:31:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 08:31:29,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:29,942 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:29,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:30,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:31:30,159 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash -487881760, now seen corresponding path program 1 times [2021-11-09 08:31:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:30,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093368191] [2021-11-09 08:31:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:30,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 08:31:30,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093368191] [2021-11-09 08:31:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093368191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710333372] [2021-11-09 08:31:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:30,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:30,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:30,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:31:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-09 08:31:31,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710333372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:31,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:31,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-09 08:31:31,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793476571] [2021-11-09 08:31:31,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:31,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:31,449 INFO L87 Difference]: Start difference. First operand 19378 states and 21208 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:32,343 INFO L93 Difference]: Finished difference Result 54017 states and 59131 transitions. [2021-11-09 08:31:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 265 [2021-11-09 08:31:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:32,399 INFO L225 Difference]: With dead ends: 54017 [2021-11-09 08:31:32,400 INFO L226 Difference]: Without dead ends: 34641 [2021-11-09 08:31:32,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34641 states. [2021-11-09 08:31:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34641 to 26081. [2021-11-09 08:31:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26081 states, 26080 states have (on average 1.098696319018405) internal successors, (28654), 26080 states have internal predecessors, (28654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26081 states to 26081 states and 28654 transitions. [2021-11-09 08:31:33,037 INFO L78 Accepts]: Start accepts. Automaton has 26081 states and 28654 transitions. Word has length 265 [2021-11-09 08:31:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:33,038 INFO L470 AbstractCegarLoop]: Abstraction has 26081 states and 28654 transitions. [2021-11-09 08:31:33,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 26081 states and 28654 transitions. [2021-11-09 08:31:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-09 08:31:33,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:33,061 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:33,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:33,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:31:33,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 941688134, now seen corresponding path program 1 times [2021-11-09 08:31:33,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:33,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373138820] [2021-11-09 08:31:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:33,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:33,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373138820] [2021-11-09 08:31:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373138820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:33,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:33,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:33,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354488551] [2021-11-09 08:31:33,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:33,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:31:33,469 INFO L87 Difference]: Start difference. First operand 26081 states and 28654 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:34,440 INFO L93 Difference]: Finished difference Result 50311 states and 55284 transitions. [2021-11-09 08:31:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 322 [2021-11-09 08:31:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:34,476 INFO L225 Difference]: With dead ends: 50311 [2021-11-09 08:31:34,476 INFO L226 Difference]: Without dead ends: 24232 [2021-11-09 08:31:34,492 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 [2021-11-09 08:31:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24232 states. [2021-11-09 08:31:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24232 to 23620. [2021-11-09 08:31:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23620 states, 23619 states have (on average 1.0795545958762014) internal successors, (25498), 23619 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23620 states to 23620 states and 25498 transitions. [2021-11-09 08:31:34,889 INFO L78 Accepts]: Start accepts. Automaton has 23620 states and 25498 transitions. Word has length 322 [2021-11-09 08:31:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 23620 states and 25498 transitions. [2021-11-09 08:31:34,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23620 states and 25498 transitions. [2021-11-09 08:31:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-09 08:31:34,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:34,914 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:34,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:31:34,914 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 889062517, now seen corresponding path program 1 times [2021-11-09 08:31:34,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:34,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100427518] [2021-11-09 08:31:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:34,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-09 08:31:35,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:35,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100427518] [2021-11-09 08:31:35,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100427518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:35,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:31:35,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554639045] [2021-11-09 08:31:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:35,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:35,163 INFO L87 Difference]: Start difference. First operand 23620 states and 25498 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:36,419 INFO L93 Difference]: Finished difference Result 58427 states and 63068 transitions. [2021-11-09 08:31:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 334 [2021-11-09 08:31:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:36,453 INFO L225 Difference]: With dead ends: 58427 [2021-11-09 08:31:36,453 INFO L226 Difference]: Without dead ends: 34809 [2021-11-09 08:31:36,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34809 states. [2021-11-09 08:31:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34809 to 34194. [2021-11-09 08:31:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 1.068844500336326) internal successors, (36547), 34193 states have internal predecessors, (36547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 36547 transitions. [2021-11-09 08:31:37,097 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 36547 transitions. Word has length 334 [2021-11-09 08:31:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:37,098 INFO L470 AbstractCegarLoop]: Abstraction has 34194 states and 36547 transitions. [2021-11-09 08:31:37,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 36547 transitions. [2021-11-09 08:31:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-09 08:31:37,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:37,127 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1] [2021-11-09 08:31:37,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:31:37,128 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -131180096, now seen corresponding path program 1 times [2021-11-09 08:31:37,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:37,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875461000] [2021-11-09 08:31:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:37,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-09 08:31:37,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:37,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875461000] [2021-11-09 08:31:37,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875461000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:37,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207956282] [2021-11-09 08:31:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:37,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:37,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:37,290 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:37,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:31:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:31:37,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:38,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207956282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:38,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:38,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-09 08:31:38,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091671680] [2021-11-09 08:31:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:31:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:31:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:38,858 INFO L87 Difference]: Start difference. First operand 34194 states and 36547 transitions. Second operand has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:41,528 INFO L93 Difference]: Finished difference Result 106847 states and 114556 transitions. [2021-11-09 08:31:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:31:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-11-09 08:31:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:41,604 INFO L225 Difference]: With dead ends: 106847 [2021-11-09 08:31:41,604 INFO L226 Difference]: Without dead ends: 72655 [2021-11-09 08:31:41,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:31:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72655 states. [2021-11-09 08:31:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72655 to 72229. [2021-11-09 08:31:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72229 states, 72228 states have (on average 1.0705820457440327) internal successors, (77326), 72228 states have internal predecessors, (77326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72229 states to 72229 states and 77326 transitions. [2021-11-09 08:31:42,925 INFO L78 Accepts]: Start accepts. Automaton has 72229 states and 77326 transitions. Word has length 339 [2021-11-09 08:31:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:42,926 INFO L470 AbstractCegarLoop]: Abstraction has 72229 states and 77326 transitions. [2021-11-09 08:31:42,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72229 states and 77326 transitions. [2021-11-09 08:31:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-11-09 08:31:43,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:43,207 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2021-11-09 08:31:43,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:31:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:43,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 587133305, now seen corresponding path program 1 times [2021-11-09 08:31:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:43,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448991900] [2021-11-09 08:31:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:43,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 240 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-09 08:31:43,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:43,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448991900] [2021-11-09 08:31:43,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448991900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:43,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667410060] [2021-11-09 08:31:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:43,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:43,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:43,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:43,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:31:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-09 08:31:45,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667410060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:45,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:45,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-09 08:31:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233427921] [2021-11-09 08:31:45,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:45,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:45,543 INFO L87 Difference]: Start difference. First operand 72229 states and 77326 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:46,456 INFO L93 Difference]: Finished difference Result 215053 states and 230284 transitions. [2021-11-09 08:31:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-11-09 08:31:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:46,795 INFO L225 Difference]: With dead ends: 215053 [2021-11-09 08:31:46,796 INFO L226 Difference]: Without dead ends: 142826 [2021-11-09 08:31:46,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142826 states. [2021-11-09 08:31:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142826 to 142820. [2021-11-09 08:31:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142820 states, 142819 states have (on average 1.0706978763329809) internal successors, (152916), 142819 states have internal predecessors, (152916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142820 states to 142820 states and 152916 transitions. [2021-11-09 08:31:49,699 INFO L78 Accepts]: Start accepts. Automaton has 142820 states and 152916 transitions. Word has length 424 [2021-11-09 08:31:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:49,699 INFO L470 AbstractCegarLoop]: Abstraction has 142820 states and 152916 transitions. [2021-11-09 08:31:49,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 142820 states and 152916 transitions. [2021-11-09 08:31:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-09 08:31:49,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:49,758 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:49,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:49,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:31:49,983 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash -873901356, now seen corresponding path program 1 times [2021-11-09 08:31:49,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:49,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167803218] [2021-11-09 08:31:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:49,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 275 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 08:31:50,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:50,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167803218] [2021-11-09 08:31:50,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167803218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:50,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155040132] [2021-11-09 08:31:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:50,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:50,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:50,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:50,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:31:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-09 08:31:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155040132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:52,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:52,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-09 08:31:52,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202335135] [2021-11-09 08:31:52,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:52,508 INFO L87 Difference]: Start difference. First operand 142820 states and 152916 transitions. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:54,044 INFO L93 Difference]: Finished difference Result 298238 states and 320414 transitions. [2021-11-09 08:31:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:31:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 426 [2021-11-09 08:31:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:54,219 INFO L225 Difference]: With dead ends: 298238 [2021-11-09 08:31:54,220 INFO L226 Difference]: Without dead ends: 155420 [2021-11-09 08:31:54,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155420 states. [2021-11-09 08:31:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155420 to 153376. [2021-11-09 08:31:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153376 states, 153375 states have (on average 1.0752599837000816) internal successors, (164918), 153375 states have internal predecessors, (164918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153376 states to 153376 states and 164918 transitions. [2021-11-09 08:31:56,949 INFO L78 Accepts]: Start accepts. Automaton has 153376 states and 164918 transitions. Word has length 426 [2021-11-09 08:31:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:56,949 INFO L470 AbstractCegarLoop]: Abstraction has 153376 states and 164918 transitions. [2021-11-09 08:31:56,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 153376 states and 164918 transitions. [2021-11-09 08:31:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-09 08:31:56,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:56,985 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:57,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:57,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:31:57,187 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -987994448, now seen corresponding path program 1 times [2021-11-09 08:31:57,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:57,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625772860] [2021-11-09 08:31:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:57,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-09 08:31:57,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:57,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625772860] [2021-11-09 08:31:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625772860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:57,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803383205] [2021-11-09 08:31:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:57,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:57,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:57,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:31:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:58,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:31:58,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-09 08:31:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803383205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:59,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-09 08:31:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543481855] [2021-11-09 08:31:59,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:31:59,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:31:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:31:59,739 INFO L87 Difference]: Start difference. First operand 153376 states and 164918 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:01,908 INFO L93 Difference]: Finished difference Result 391199 states and 422098 transitions. [2021-11-09 08:32:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 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 444 [2021-11-09 08:32:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:02,233 INFO L225 Difference]: With dead ends: 391199 [2021-11-09 08:32:02,234 INFO L226 Difference]: Without dead ends: 237825 [2021-11-09 08:32:02,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237825 states. [2021-11-09 08:32:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237825 to 233532. [2021-11-09 08:32:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233532 states, 233531 states have (on average 1.0713952323246165) internal successors, (250204), 233531 states have internal predecessors, (250204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233532 states to 233532 states and 250204 transitions. [2021-11-09 08:32:06,330 INFO L78 Accepts]: Start accepts. Automaton has 233532 states and 250204 transitions. Word has length 444 [2021-11-09 08:32:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:06,331 INFO L470 AbstractCegarLoop]: Abstraction has 233532 states and 250204 transitions. [2021-11-09 08:32:06,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 233532 states and 250204 transitions. [2021-11-09 08:32:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-09 08:32:06,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:06,388 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:06,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:06,599 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash -833419571, now seen corresponding path program 1 times [2021-11-09 08:32:06,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:06,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291968061] [2021-11-09 08:32:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:06,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-09 08:32:07,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:07,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291968061] [2021-11-09 08:32:07,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291968061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:07,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581738699] [2021-11-09 08:32:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:07,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:07,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:32:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:08,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-09 08:32:09,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581738699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:09,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:09,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-09 08:32:09,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416579690] [2021-11-09 08:32:09,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:09,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:09,564 INFO L87 Difference]: Start difference. First operand 233532 states and 250204 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:12,186 INFO L93 Difference]: Finished difference Result 469518 states and 502818 transitions. [2021-11-09 08:32:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 447 [2021-11-09 08:32:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:12,603 INFO L225 Difference]: With dead ends: 469518 [2021-11-09 08:32:12,604 INFO L226 Difference]: Without dead ends: 235988 [2021-11-09 08:32:12,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235988 states. [2021-11-09 08:32:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235988 to 235345. [2021-11-09 08:32:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235345 states, 235344 states have (on average 1.0677518866000408) internal successors, (251289), 235344 states have internal predecessors, (251289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235345 states to 235345 states and 251289 transitions. [2021-11-09 08:32:16,900 INFO L78 Accepts]: Start accepts. Automaton has 235345 states and 251289 transitions. Word has length 447 [2021-11-09 08:32:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:16,901 INFO L470 AbstractCegarLoop]: Abstraction has 235345 states and 251289 transitions. [2021-11-09 08:32:16,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 235345 states and 251289 transitions. [2021-11-09 08:32:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-09 08:32:16,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:16,959 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:16,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-09 08:32:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:17,175 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -730122474, now seen corresponding path program 1 times [2021-11-09 08:32:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:17,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282151859] [2021-11-09 08:32:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:17,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-09 08:32:18,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:18,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282151859] [2021-11-09 08:32:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282151859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:18,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:18,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:32:18,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520978148] [2021-11-09 08:32:18,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:18,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:18,111 INFO L87 Difference]: Start difference. First operand 235345 states and 251289 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:19,975 INFO L93 Difference]: Finished difference Result 363136 states and 387287 transitions. [2021-11-09 08:32:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 477 [2021-11-09 08:32:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:20,117 INFO L225 Difference]: With dead ends: 363136 [2021-11-09 08:32:20,118 INFO L226 Difference]: Without dead ends: 113989 [2021-11-09 08:32:20,204 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 [2021-11-09 08:32:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113989 states. [2021-11-09 08:32:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113989 to 77753. [2021-11-09 08:32:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77753 states, 77752 states have (on average 1.0620562815104435) internal successors, (82577), 77752 states have internal predecessors, (82577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77753 states to 77753 states and 82577 transitions. [2021-11-09 08:32:22,677 INFO L78 Accepts]: Start accepts. Automaton has 77753 states and 82577 transitions. Word has length 477 [2021-11-09 08:32:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:22,677 INFO L470 AbstractCegarLoop]: Abstraction has 77753 states and 82577 transitions. [2021-11-09 08:32:22,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 77753 states and 82577 transitions. [2021-11-09 08:32:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-09 08:32:22,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:22,701 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:32:22,701 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1131202874, now seen corresponding path program 1 times [2021-11-09 08:32:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:22,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037877342] [2021-11-09 08:32:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:22,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 427 proven. 143 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-09 08:32:23,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037877342] [2021-11-09 08:32:23,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037877342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:23,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095640414] [2021-11-09 08:32:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:23,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:23,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:23,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:32:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-09 08:32:25,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095640414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:25,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:25,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-11-09 08:32:25,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659812582] [2021-11-09 08:32:25,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:25,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:25,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:25,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:32:25,659 INFO L87 Difference]: Start difference. First operand 77753 states and 82577 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:27,409 INFO L93 Difference]: Finished difference Result 156967 states and 166742 transitions. [2021-11-09 08:32:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 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 483 [2021-11-09 08:32:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:27,497 INFO L225 Difference]: With dead ends: 156967 [2021-11-09 08:32:27,497 INFO L226 Difference]: Without dead ends: 79216 [2021-11-09 08:32:27,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:32:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79216 states. [2021-11-09 08:32:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79216 to 52080. [2021-11-09 08:32:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52080 states, 52079 states have (on average 1.0493289041648266) internal successors, (54648), 52079 states have internal predecessors, (54648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52080 states to 52080 states and 54648 transitions. [2021-11-09 08:32:28,340 INFO L78 Accepts]: Start accepts. Automaton has 52080 states and 54648 transitions. Word has length 483 [2021-11-09 08:32:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:28,341 INFO L470 AbstractCegarLoop]: Abstraction has 52080 states and 54648 transitions. [2021-11-09 08:32:28,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 52080 states and 54648 transitions. [2021-11-09 08:32:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-09 08:32:28,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:28,366 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:28,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:28,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_969e4356-d4f1-4a2b-beb2-d1c7be35ff6b/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:32:28,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1815807000, now seen corresponding path program 1 times [2021-11-09 08:32:28,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:28,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227878111] [2021-11-09 08:32:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:28,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms