./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD --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 fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:15:15,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:15:15,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:15:16,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:15:16,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:15:16,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:15:16,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:15:16,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:15:16,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:15:16,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:15:16,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:15:16,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:15:16,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:15:16,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:15:16,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:15:16,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:15:16,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:15:16,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:15:16,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:15:16,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:15:16,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:15:16,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:15:16,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:15:16,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:15:16,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:15:16,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:15:16,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:15:16,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:15:16,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:15:16,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:15:16,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:15:16,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:15:16,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:15:16,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:15:16,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:15:16,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:15:16,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:15:16,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:15:16,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:15:16,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:15:16,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:15:16,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:15:16,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:15:16,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:15:16,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:15:16,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:15:16,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:15:16,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:15:16,144 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:15:16,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:15:16,145 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:15:16,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:15:16,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:15:16,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:15:16,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:15:16,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:15:16,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:15:16,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:15:16,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:15:16,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:15:16,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:15:16,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:15:16,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:15:16,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:15:16,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:15:16,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:15:16,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:15:16,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:15:16,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:15:16,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:15:16,153 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:15:16,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:15:16,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:15:16,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:15:16,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2021-10-28 23:15:16,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:15:16,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:15:16,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:15:16,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:15:16,457 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:15:16,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-10-28 23:15:16,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/data/76749ab8f/79054d598d204868b0c82b9a2889fd8a/FLAGcd8702163 [2021-10-28 23:15:17,040 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:15:17,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/sv-benchmarks/c/loop-simple/nested_4.c [2021-10-28 23:15:17,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/data/76749ab8f/79054d598d204868b0c82b9a2889fd8a/FLAGcd8702163 [2021-10-28 23:15:17,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/data/76749ab8f/79054d598d204868b0c82b9a2889fd8a [2021-10-28 23:15:17,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:15:17,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:15:17,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:15:17,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:15:17,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:15:17,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f67b7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17, skipping insertion in model container [2021-10-28 23:15:17,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:15:17,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:15:17,683 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_6fb614c0-9155-486c-a083-08a1fc4c02c4/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-28 23:15:17,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:15:17,699 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:15:17,716 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_6fb614c0-9155-486c-a083-08a1fc4c02c4/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-28 23:15:17,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:15:17,731 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:15:17,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17 WrapperNode [2021-10-28 23:15:17,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:15:17,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:15:17,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:15:17,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:15:17,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:15:17,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:15:17,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:15:17,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:15:17,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:15:17,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:15:17,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:15:17,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:15:17,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (1/1) ... [2021-10-28 23:15:17,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:15:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:17,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:15:17,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:15:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:15:17,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:15:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:15:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:15:18,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:15:18,186 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 23:15:18,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:18 BoogieIcfgContainer [2021-10-28 23:15:18,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:15:18,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:15:18,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:15:18,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:15:18,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:15:17" (1/3) ... [2021-10-28 23:15:18,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dafe171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:15:18, skipping insertion in model container [2021-10-28 23:15:18,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:15:17" (2/3) ... [2021-10-28 23:15:18,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dafe171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:15:18, skipping insertion in model container [2021-10-28 23:15:18,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:18" (3/3) ... [2021-10-28 23:15:18,212 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-10-28 23:15:18,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:15:18,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:15:18,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:15:18,278 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 [2021-10-28 23:15:18,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:15:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 23:15:18,308 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,308 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:18,309 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-10-28 23:15:18,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108928617] [2021-10-28 23:15:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:18,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:18,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108928617] [2021-10-28 23:15:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108928617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:18,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:18,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:15:18,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080628240] [2021-10-28 23:15:18,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:15:18,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:15:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:15:18,526 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:18,545 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-10-28 23:15:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:15:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-28 23:15:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:18,554 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:15:18,554 INFO L226 Difference]: Without dead ends: 13 [2021-10-28 23:15:18,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:15:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-28 23:15:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 23:15:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-28 23:15:18,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-10-28 23:15:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:18,590 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-28 23:15:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-28 23:15:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 23:15:18,592 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,592 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 23:15:18,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:15:18,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-10-28 23:15:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010461202] [2021-10-28 23:15:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:18,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:18,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010461202] [2021-10-28 23:15:18,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010461202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:18,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:18,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:18,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136817137] [2021-10-28 23:15:18,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:15:18,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,656 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:18,673 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-10-28 23:15:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-28 23:15:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:18,675 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:15:18,675 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 23:15:18,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 23:15:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-28 23:15:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-28 23:15:18,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-10-28 23:15:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-28 23:15:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-28 23:15:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:15:18,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:18,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:15:18,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2021-10-28 23:15:18,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916274657] [2021-10-28 23:15:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:18,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:18,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916274657] [2021-10-28 23:15:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916274657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842391355] [2021-10-28 23:15:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:15:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,737 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:18,764 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-10-28 23:15:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:18,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-28 23:15:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:18,767 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:15:18,769 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:15:18,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:15:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-10-28 23:15:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-28 23:15:18,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-10-28 23:15:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:18,777 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-28 23:15:18,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-28 23:15:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:15:18,780 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:18,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:15:18,781 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2021-10-28 23:15:18,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344378766] [2021-10-28 23:15:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:18,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:18,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344378766] [2021-10-28 23:15:18,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344378766] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:18,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:18,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:18,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517016083] [2021-10-28 23:15:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:15:18,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,836 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:18,851 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-10-28 23:15:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-28 23:15:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:18,853 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:15:18,853 INFO L226 Difference]: Without dead ends: 19 [2021-10-28 23:15:18,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-28 23:15:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-10-28 23:15:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-28 23:15:18,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-10-28 23:15:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:18,858 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-28 23:15:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-28 23:15:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:15:18,860 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,860 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:18,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:15:18,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2021-10-28 23:15:18,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995740005] [2021-10-28 23:15:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:18,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995740005] [2021-10-28 23:15:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995740005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:18,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:15:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:15:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935249748] [2021-10-28 23:15:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:15:18,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:15:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,930 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:18,961 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-10-28 23:15:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:15:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 23:15:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:18,964 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:15:18,964 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:15:18,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:15:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:15:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 23:15:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-28 23:15:18,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2021-10-28 23:15:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:18,969 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-28 23:15:18,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-28 23:15:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:15:18,971 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:18,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:18,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:15:18,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:18,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2021-10-28 23:15:18,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:18,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681471991] [2021-10-28 23:15:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:18,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:19,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:19,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681471991] [2021-10-28 23:15:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681471991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:19,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460552261] [2021-10-28 23:15:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:19,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:19,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:19,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:15:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:15:19,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460552261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:19,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 23:15:19,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013454279] [2021-10-28 23:15:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:15:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:15:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:15:19,172 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:19,192 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-10-28 23:15:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:15:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 23:15:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:19,194 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:15:19,194 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:15:19,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:15:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:15:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-28 23:15:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-28 23:15:19,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-10-28 23:15:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-28 23:15:19,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-28 23:15:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:15:19,201 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:19,201 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:19,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:19,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:19,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2021-10-28 23:15:19,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:19,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846755925] [2021-10-28 23:15:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:19,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:15:19,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:19,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846755925] [2021-10-28 23:15:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846755925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:19,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906953175] [2021-10-28 23:15:19,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:19,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:19,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:19,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:19,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:15:19,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:15:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:15:19,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906953175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:19,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:19,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-28 23:15:19,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759850106] [2021-10-28 23:15:19,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:15:19,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:19,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:15:19,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:15:19,691 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:19,780 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-10-28 23:15:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:15:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 23:15:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:19,782 INFO L225 Difference]: With dead ends: 57 [2021-10-28 23:15:19,782 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:15:19,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:15:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:15:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-10-28 23:15:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-28 23:15:19,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-10-28 23:15:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:19,790 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-28 23:15:19,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-28 23:15:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:15:19,791 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:19,792 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:15:19,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:15:20,017 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2021-10-28 23:15:20,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:20,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528355385] [2021-10-28 23:15:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:20,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 23:15:20,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:20,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528355385] [2021-10-28 23:15:20,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528355385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:20,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130931675] [2021-10-28 23:15:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:20,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:20,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:20,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:20,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:15:20,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:15:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:15:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-28 23:15:20,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130931675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:20,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:20,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 23:15:20,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464373725] [2021-10-28 23:15:20,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:15:20,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:15:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:15:20,345 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:20,489 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2021-10-28 23:15:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:15:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 23:15:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:20,493 INFO L225 Difference]: With dead ends: 227 [2021-10-28 23:15:20,493 INFO L226 Difference]: Without dead ends: 200 [2021-10-28 23:15:20,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:15:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-28 23:15:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2021-10-28 23:15:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-10-28 23:15:20,517 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2021-10-28 23:15:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:20,518 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-10-28 23:15:20,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-10-28 23:15:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 23:15:20,522 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:20,522 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:20,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:20,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:20,749 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2021-10-28 23:15:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:20,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565073097] [2021-10-28 23:15:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:20,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-28 23:15:20,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:20,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565073097] [2021-10-28 23:15:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565073097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:20,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803639184] [2021-10-28 23:15:20,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:15:20,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:20,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:20,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:20,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:15:21,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:15:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:15:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-28 23:15:21,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803639184] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:21,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:21,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 23:15:21,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358504016] [2021-10-28 23:15:21,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:15:21,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:15:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:15:21,297 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:21,337 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2021-10-28 23:15:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:15:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 95 [2021-10-28 23:15:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:21,339 INFO L225 Difference]: With dead ends: 204 [2021-10-28 23:15:21,339 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 23:15:21,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:15:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 23:15:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2021-10-28 23:15:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-10-28 23:15:21,358 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2021-10-28 23:15:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-10-28 23:15:21,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-10-28 23:15:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 23:15:21,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:21,364 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:21,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:21,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:21,588 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2021-10-28 23:15:21,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:21,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238171725] [2021-10-28 23:15:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:21,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2021-10-28 23:15:21,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:21,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238171725] [2021-10-28 23:15:21,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238171725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:21,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365064448] [2021-10-28 23:15:21,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:21,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:21,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:21,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:15:21,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 23:15:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:15:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-28 23:15:22,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365064448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:22,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:22,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 23:15:22,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196590033] [2021-10-28 23:15:22,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:15:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:15:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:22,173 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:22,229 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2021-10-28 23:15:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:15:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-28 23:15:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:22,231 INFO L225 Difference]: With dead ends: 234 [2021-10-28 23:15:22,231 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 23:15:22,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 23:15:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-10-28 23:15:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 127 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2021-10-28 23:15:22,255 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2021-10-28 23:15:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:22,255 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2021-10-28 23:15:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2021-10-28 23:15:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-28 23:15:22,258 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:22,259 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:22,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:22,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:15:22,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2021-10-28 23:15:22,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:22,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11059494] [2021-10-28 23:15:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:22,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2021-10-28 23:15:22,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:22,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11059494] [2021-10-28 23:15:22,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11059494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:22,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117666234] [2021-10-28 23:15:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:22,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:22,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:22,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:22,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:15:22,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-10-28 23:15:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:15:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-10-28 23:15:23,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117666234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:23,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:23,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 23:15:23,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726503302] [2021-10-28 23:15:23,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:15:23,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:23,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:15:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:23,131 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:23,170 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2021-10-28 23:15:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:15:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 127 [2021-10-28 23:15:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:23,172 INFO L225 Difference]: With dead ends: 256 [2021-10-28 23:15:23,173 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 23:15:23,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 23:15:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-28 23:15:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2021-10-28 23:15:23,216 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2021-10-28 23:15:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:23,219 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2021-10-28 23:15:23,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2021-10-28 23:15:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-28 23:15:23,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:23,223 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:23,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:23,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2021-10-28 23:15:23,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:23,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273012110] [2021-10-28 23:15:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:23,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-28 23:15:23,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:23,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273012110] [2021-10-28 23:15:23,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273012110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:23,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691698111] [2021-10-28 23:15:23,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:23,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:23,535 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:15:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:15:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-28 23:15:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691698111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:24,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:24,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 23:15:24,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252711932] [2021-10-28 23:15:24,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:15:24,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:15:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:15:24,053 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:24,089 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2021-10-28 23:15:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:15:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 143 [2021-10-28 23:15:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:24,091 INFO L225 Difference]: With dead ends: 369 [2021-10-28 23:15:24,091 INFO L226 Difference]: Without dead ends: 260 [2021-10-28 23:15:24,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:15:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-28 23:15:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2021-10-28 23:15:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0935960591133005) internal successors, (222), 203 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2021-10-28 23:15:24,141 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2021-10-28 23:15:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2021-10-28 23:15:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2021-10-28 23:15:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-28 23:15:24,148 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:24,148 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:24,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:24,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:24,377 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:24,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2021-10-28 23:15:24,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:24,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586129189] [2021-10-28 23:15:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:24,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-28 23:15:24,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:24,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586129189] [2021-10-28 23:15:24,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586129189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:24,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323907906] [2021-10-28 23:15:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:24,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:24,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:24,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:15:24,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:15:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-28 23:15:25,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323907906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:25,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:25,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 23:15:25,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926440481] [2021-10-28 23:15:25,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:15:25,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:15:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:15:25,166 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:25,203 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2021-10-28 23:15:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:15:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-10-28 23:15:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:25,206 INFO L225 Difference]: With dead ends: 474 [2021-10-28 23:15:25,206 INFO L226 Difference]: Without dead ends: 320 [2021-10-28 23:15:25,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:15:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-28 23:15:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2021-10-28 23:15:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2021-10-28 23:15:25,226 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2021-10-28 23:15:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:25,228 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2021-10-28 23:15:25,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2021-10-28 23:15:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-28 23:15:25,232 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:25,233 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:25,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:25,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:15:25,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2021-10-28 23:15:25,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:25,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223755781] [2021-10-28 23:15:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:25,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2021-10-28 23:15:25,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:25,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223755781] [2021-10-28 23:15:25,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223755781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:25,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300789324] [2021-10-28 23:15:25,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:25,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:25,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:25,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:25,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:15:25,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-28 23:15:25,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:15:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2021-10-28 23:15:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300789324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:26,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:26,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 23:15:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163072267] [2021-10-28 23:15:26,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:15:26,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:15:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:26,539 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:26,583 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2021-10-28 23:15:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:15:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 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 263 [2021-10-28 23:15:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:26,587 INFO L225 Difference]: With dead ends: 579 [2021-10-28 23:15:26,587 INFO L226 Difference]: Without dead ends: 380 [2021-10-28 23:15:26,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-28 23:15:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2021-10-28 23:15:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.08359133126935) internal successors, (350), 323 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2021-10-28 23:15:26,623 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2021-10-28 23:15:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:26,625 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2021-10-28 23:15:26,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2021-10-28 23:15:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-10-28 23:15:26,630 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:26,631 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:26,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:26,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:26,855 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2021-10-28 23:15:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:26,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196035376] [2021-10-28 23:15:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:26,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-28 23:15:27,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:27,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196035376] [2021-10-28 23:15:27,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196035376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:27,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784423272] [2021-10-28 23:15:27,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:15:27,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:27,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:27,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:27,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:15:27,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:15:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:15:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-28 23:15:28,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784423272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:28,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 23:15:28,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471870842] [2021-10-28 23:15:28,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:15:28,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:15:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:28,097 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:28,156 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2021-10-28 23:15:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:15:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-10-28 23:15:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:28,159 INFO L225 Difference]: With dead ends: 628 [2021-10-28 23:15:28,159 INFO L226 Difference]: Without dead ends: 384 [2021-10-28 23:15:28,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-28 23:15:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-10-28 23:15:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.080939947780679) internal successors, (414), 383 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2021-10-28 23:15:28,191 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2021-10-28 23:15:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:28,192 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2021-10-28 23:15:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2021-10-28 23:15:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-10-28 23:15:28,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:28,200 INFO L513 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:28,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:15:28,425 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2021-10-28 23:15:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:28,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196651959] [2021-10-28 23:15:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:28,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-28 23:15:28,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:28,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196651959] [2021-10-28 23:15:28,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196651959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:28,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140372480] [2021-10-28 23:15:28,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:15:28,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:28,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:15:29,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-10-28 23:15:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:15:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-28 23:15:30,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140372480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:30,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 23:15:30,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39628807] [2021-10-28 23:15:30,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:15:30,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:15:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:15:30,183 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:30,244 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2021-10-28 23:15:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:15:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-10-28 23:15:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:30,250 INFO L225 Difference]: With dead ends: 948 [2021-10-28 23:15:30,250 INFO L226 Difference]: Without dead ends: 754 [2021-10-28 23:15:30,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:15:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-28 23:15:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2021-10-28 23:15:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.07908611599297) internal successors, (614), 569 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2021-10-28 23:15:30,298 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2021-10-28 23:15:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:30,298 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2021-10-28 23:15:30,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2021-10-28 23:15:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-10-28 23:15:30,313 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:30,314 INFO L513 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:15:30,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:15:30,540 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2021-10-28 23:15:30,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:30,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094362161] [2021-10-28 23:15:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:30,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2021-10-28 23:15:30,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:30,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094362161] [2021-10-28 23:15:30,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094362161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:30,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227239998] [2021-10-28 23:15:30,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:15:30,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:30,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:30,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:30,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:15:31,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2021-10-28 23:15:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:31,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:15:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2021-10-28 23:15:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227239998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:33,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-28 23:15:33,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311204662] [2021-10-28 23:15:33,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:15:33,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:15:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:33,442 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:33,658 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2021-10-28 23:15:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:15:33,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 569 [2021-10-28 23:15:33,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:33,670 INFO L225 Difference]: With dead ends: 2160 [2021-10-28 23:15:33,670 INFO L226 Difference]: Without dead ends: 1873 [2021-10-28 23:15:33,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:15:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-10-28 23:15:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2021-10-28 23:15:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.0778761061946902) internal successors, (1218), 1130 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2021-10-28 23:15:33,767 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2021-10-28 23:15:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:33,768 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2021-10-28 23:15:33,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2021-10-28 23:15:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2021-10-28 23:15:33,780 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:33,781 INFO L513 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 23:15:33,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:34,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:15:34,001 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2021-10-28 23:15:34,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:34,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953936042] [2021-10-28 23:15:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:34,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-28 23:15:34,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:34,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953936042] [2021-10-28 23:15:34,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953936042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:34,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777177344] [2021-10-28 23:15:34,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:15:34,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:34,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:34,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:15:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:15:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-28 23:15:38,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777177344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:38,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:38,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 23:15:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302761873] [2021-10-28 23:15:38,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:15:38,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:38,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:15:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:38,078 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:38,193 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2021-10-28 23:15:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:15:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1130 [2021-10-28 23:15:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:38,204 INFO L225 Difference]: With dead ends: 2441 [2021-10-28 23:15:38,204 INFO L226 Difference]: Without dead ends: 1686 [2021-10-28 23:15:38,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:15:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-10-28 23:15:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2021-10-28 23:15:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.0773598296664302) internal successors, (1518), 1409 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2021-10-28 23:15:38,298 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2021-10-28 23:15:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:38,299 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2021-10-28 23:15:38,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2021-10-28 23:15:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2021-10-28 23:15:38,316 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:38,317 INFO L513 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 23:15:38,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:15:38,538 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2021-10-28 23:15:38,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:38,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486843944] [2021-10-28 23:15:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:38,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-28 23:15:39,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:39,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486843944] [2021-10-28 23:15:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486843944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:39,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338255210] [2021-10-28 23:15:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:15:39,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:39,376 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:39,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:15:40,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:15:40,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:15:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-28 23:15:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338255210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:43,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:15:43,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 23:15:43,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310841560] [2021-10-28 23:15:43,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:15:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:15:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:43,444 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:43,591 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2021-10-28 23:15:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:15:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1409 [2021-10-28 23:15:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:43,602 INFO L225 Difference]: With dead ends: 2630 [2021-10-28 23:15:43,603 INFO L226 Difference]: Without dead ends: 1689 [2021-10-28 23:15:43,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:15:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-10-28 23:15:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2021-10-28 23:15:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 1.0770142180094786) internal successors, (1818), 1688 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2021-10-28 23:15:43,740 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2021-10-28 23:15:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:43,742 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2021-10-28 23:15:43,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2021-10-28 23:15:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2021-10-28 23:15:43,765 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:15:43,766 INFO L513 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 23:15:43,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:43,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:43,982 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:15:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:15:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2021-10-28 23:15:43,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:15:43,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582084888] [2021-10-28 23:15:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:15:43,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:15:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:15:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2021-10-28 23:15:45,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:15:45,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582084888] [2021-10-28 23:15:45,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582084888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:15:45,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027807015] [2021-10-28 23:15:45,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:15:45,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:15:45,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:15:45,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:15:48,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-28 23:15:48,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:15:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:15:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:15:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2021-10-28 23:15:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027807015] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:15:53,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:15:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2021-10-28 23:15:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324842003] [2021-10-28 23:15:53,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:15:53,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:15:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:15:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:15:53,628 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:15:53,816 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2021-10-28 23:15:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:15:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 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 1688 [2021-10-28 23:15:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:15:53,821 INFO L225 Difference]: With dead ends: 1689 [2021-10-28 23:15:53,821 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:15:53,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:15:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:15:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:15:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:15:53,826 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2021-10-28 23:15:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:15:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:15:53,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:15:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:15:53,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:15:53,830 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:15:53,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:15:54,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:15:54,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 23:15:54,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:15:54,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:16:06,885 WARN L207 SmtUtils]: Spent 12.82 s on a formula simplification. DAG size of input: 2361 DAG size of output: 394 [2021-10-28 23:16:06,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:16:06,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:16:06,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:16:09,323 INFO L857 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-10-28 23:16:09,323 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-10-28 23:16:09,323 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 7) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 23:16:09,324 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-10-28 23:16:09,325 INFO L853 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 6) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-28 23:16:09,325 INFO L860 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-10-28 23:16:09,325 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-10-28 23:16:09,325 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~d~0) (<= 6 ULTIMATE.start_main_~b~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~a~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-28 23:16:09,325 INFO L857 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-10-28 23:16:09,328 INFO L731 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1] [2021-10-28 23:16:09,329 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:16:09,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:16:09 BoogieIcfgContainer [2021-10-28 23:16:09,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:16:09,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:16:09,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:16:09,345 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:16:09,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:15:18" (3/4) ... [2021-10-28 23:16:09,349 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:16:09,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 23:16:09,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:16:09,360 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:16:09,360 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:16:09,396 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:16:09,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:16:09,398 INFO L168 Benchmark]: Toolchain (without parser) took 51984.97 ms. Allocated memory was 96.5 MB in the beginning and 926.9 MB in the end (delta: 830.5 MB). Free memory was 63.9 MB in the beginning and 731.0 MB in the end (delta: -667.1 MB). Peak memory consumption was 162.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:09,398 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:09,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.64 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 73.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:09,400 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.00 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:09,401 INFO L168 Benchmark]: Boogie Preprocessor took 21.53 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 70.7 MB in the end (delta: 885.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:09,402 INFO L168 Benchmark]: RCFGBuilder took 411.37 ms. Allocated memory is still 96.5 MB. Free memory was 70.7 MB in the beginning and 61.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:09,402 INFO L168 Benchmark]: TraceAbstraction took 51141.33 ms. Allocated memory was 96.5 MB in the beginning and 926.9 MB in the end (delta: 830.5 MB). Free memory was 60.8 MB in the beginning and 733.1 MB in the end (delta: -672.3 MB). Peak memory consumption was 631.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:09,402 INFO L168 Benchmark]: Witness Printer took 51.84 ms. Allocated memory is still 926.9 MB. Free memory was 733.1 MB in the beginning and 731.0 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:09,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.64 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 73.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.00 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.53 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 70.7 MB in the end (delta: 885.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 411.37 ms. Allocated memory is still 96.5 MB. Free memory was 70.7 MB in the beginning and 61.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51141.33 ms. Allocated memory was 96.5 MB in the beginning and 926.9 MB in the end (delta: 830.5 MB). Free memory was 60.8 MB in the beginning and 733.1 MB in the end (delta: -672.3 MB). Peak memory consumption was 631.5 MB. Max. memory is 16.1 GB. * Witness Printer took 51.84 ms. Allocated memory is still 926.9 MB. Free memory was 733.1 MB in the beginning and 731.0 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.0s, OverallIterations: 20, TraceHistogramMax: 648, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.1s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 491 SDs, 0 SdLazy, 394 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6623 GetRequests, 6505 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 579689 FormulaSimplificationTreeSizeReduction, 13.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 20312 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 24931 SizeOfPredicates, 4 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((a < 6 && d < 7) && c < 6) && b <= 5 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && 6 <= d) && b < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((6 <= d && 6 <= b) && b < 7) && a < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((a < 6 && 6 <= d) && d < 7) && c < 7) && b <= 5 RESULT: Ultimate proved your program to be correct! [2021-10-28 23:16:09,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb614c0-9155-486c-a083-08a1fc4c02c4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...