./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 500fb51493d30e1b316117b24f5b2ae67d8f35b2c1172c5ed38f45dce818927e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:39:38,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:39:38,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:39:38,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:39:38,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:39:38,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:39:38,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:39:38,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:39:38,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:39:38,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:39:38,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:39:38,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:39:38,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:39:38,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:39:38,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:39:38,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:39:38,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:39:38,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:39:38,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:39:38,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:39:38,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:39:38,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:39:38,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:39:38,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:39:38,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:39:38,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:39:38,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:39:38,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:39:38,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:39:38,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:39:38,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:39:38,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:39:38,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:39:38,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:39:38,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:39:38,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:39:38,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:39:38,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:39:38,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:39:38,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:39:38,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:39:38,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:39:38,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:39:38,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:39:38,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:39:38,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:39:38,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:39:38,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:39:38,499 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:39:38,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:39:38,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:39:38,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:39:38,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:39:38,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:39:38,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:39:38,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:39:38,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:39:38,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:39:38,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:39:38,502 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:39:38,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:39:38,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:39:38,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:39:38,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:39:38,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:39:38,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:39:38,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:39:38,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:39:38,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:39:38,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:39:38,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:39:38,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:39:38,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:39:38,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:39:38,506 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_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 500fb51493d30e1b316117b24f5b2ae67d8f35b2c1172c5ed38f45dce818927e [2021-11-02 22:39:38,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:39:38,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:39:38,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:39:38,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:39:38,840 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:39:38,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2021-11-02 22:39:38,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/data/fe766cd10/04bef8d6b98f41ce909aa523ebfb58c0/FLAGb36de502f [2021-11-02 22:39:39,848 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:39:39,849 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2021-11-02 22:39:39,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/data/fe766cd10/04bef8d6b98f41ce909aa523ebfb58c0/FLAGb36de502f [2021-11-02 22:39:40,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/data/fe766cd10/04bef8d6b98f41ce909aa523ebfb58c0 [2021-11-02 22:39:40,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:39:40,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:39:40,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:39:40,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:39:40,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:39:40,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:39:40" (1/1) ... [2021-11-02 22:39:40,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111e2c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:40, skipping insertion in model container [2021-11-02 22:39:40,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:39:40" (1/1) ... [2021-11-02 22:39:40,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:39:40,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:39:40,806 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_623b0201-fb2f-42af-a6d3-4135a92666b2/sv-benchmarks/c/eca-rers2012/Problem13_label01.c[7003,7016] [2021-11-02 22:39:42,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:39:42,194 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:39:42,242 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_623b0201-fb2f-42af-a6d3-4135a92666b2/sv-benchmarks/c/eca-rers2012/Problem13_label01.c[7003,7016] [2021-11-02 22:39:43,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:39:43,219 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:39:43,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43 WrapperNode [2021-11-02 22:39:43,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:39:43,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:39:43,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:39:43,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:39:43,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:43,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:39:44,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:39:44,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:39:44,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:39:44,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:44,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:39:44,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:39:44,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:39:44,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:39:44,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (1/1) ... [2021-11-02 22:39:45,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:39:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:45,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:39:45,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:39:45,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:39:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:39:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:39:45,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:39:51,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:39:51,003 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-02 22:39:51,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:39:51 BoogieIcfgContainer [2021-11-02 22:39:51,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:39:51,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:39:51,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:39:51,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:39:51,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:39:40" (1/3) ... [2021-11-02 22:39:51,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6780c1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:39:51, skipping insertion in model container [2021-11-02 22:39:51,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:39:43" (2/3) ... [2021-11-02 22:39:51,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6780c1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:39:51, skipping insertion in model container [2021-11-02 22:39:51,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:39:51" (3/3) ... [2021-11-02 22:39:51,017 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label01.c [2021-11-02 22:39:51,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:39:51,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:39:51,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:39:51,103 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:39:51,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:39:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:39:51,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:51,161 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:51,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-11-02 22:39:51,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:51,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476490378] [2021-11-02 22:39:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:51,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:39:51,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:51,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476490378] [2021-11-02 22:39:51,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476490378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:39:51,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:39:51,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:39:51,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182213170] [2021-11-02 22:39:51,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:39:51,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:39:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:39:51,697 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:57,050 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-11-02 22:39:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:39:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:39:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:57,084 INFO L225 Difference]: With dead ends: 3082 [2021-11-02 22:39:57,084 INFO L226 Difference]: Without dead ends: 1899 [2021-11-02 22:39:57,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:39:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-02 22:39:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-11-02 22:39:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-11-02 22:39:57,232 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 49 [2021-11-02 22:39:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:57,233 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-11-02 22:39:57,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-11-02 22:39:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 22:39:57,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:57,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:39:57,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:39:57,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash -285580078, now seen corresponding path program 1 times [2021-11-02 22:39:57,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:57,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602720377] [2021-11-02 22:39:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:57,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:39:57,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:57,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602720377] [2021-11-02 22:39:57,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602720377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:39:57,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:39:57,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:39:57,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483000034] [2021-11-02 22:39:57,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:39:57,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:39:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:39:57,473 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:02,591 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2021-11-02 22:40:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-02 22:40:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:02,616 INFO L225 Difference]: With dead ends: 5384 [2021-11-02 22:40:02,616 INFO L226 Difference]: Without dead ends: 3492 [2021-11-02 22:40:02,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-11-02 22:40:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2021-11-02 22:40:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2021-11-02 22:40:02,713 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 114 [2021-11-02 22:40:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:02,715 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2021-11-02 22:40:02,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2021-11-02 22:40:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 22:40:02,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:02,725 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:02,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:40:02,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1860662409, now seen corresponding path program 1 times [2021-11-02 22:40:02,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:02,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388769222] [2021-11-02 22:40:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:02,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:02,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:02,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388769222] [2021-11-02 22:40:02,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388769222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:02,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:02,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:40:02,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848617903] [2021-11-02 22:40:02,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:02,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:02,878 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:07,678 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2021-11-02 22:40:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-02 22:40:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:07,724 INFO L225 Difference]: With dead ends: 10169 [2021-11-02 22:40:07,724 INFO L226 Difference]: Without dead ends: 6680 [2021-11-02 22:40:07,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2021-11-02 22:40:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2021-11-02 22:40:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2021-11-02 22:40:07,915 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 116 [2021-11-02 22:40:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:07,917 INFO L470 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2021-11-02 22:40:07,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2021-11-02 22:40:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 22:40:07,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:07,921 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:07,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:40:07,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash 506522501, now seen corresponding path program 1 times [2021-11-02 22:40:07,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:07,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635059662] [2021-11-02 22:40:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:07,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:08,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:08,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635059662] [2021-11-02 22:40:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635059662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:08,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:08,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:40:08,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13244482] [2021-11-02 22:40:08,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:08,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:08,156 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:11,931 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2021-11-02 22:40:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:11,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-02 22:40:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:11,975 INFO L225 Difference]: With dead ends: 14123 [2021-11-02 22:40:11,975 INFO L226 Difference]: Without dead ends: 7456 [2021-11-02 22:40:11,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-11-02 22:40:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2021-11-02 22:40:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2021-11-02 22:40:12,222 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 160 [2021-11-02 22:40:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:12,224 INFO L470 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2021-11-02 22:40:12,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2021-11-02 22:40:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-02 22:40:12,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:12,229 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:12,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:40:12,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:12,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1459044689, now seen corresponding path program 1 times [2021-11-02 22:40:12,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:12,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235488979] [2021-11-02 22:40:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:12,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:12,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:12,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235488979] [2021-11-02 22:40:12,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235488979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:12,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:12,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:40:12,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994172929] [2021-11-02 22:40:12,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:40:12,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:40:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:12,398 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:21,415 INFO L93 Difference]: Finished difference Result 26116 states and 35959 transitions. [2021-11-02 22:40:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:40:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2021-11-02 22:40:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:21,519 INFO L225 Difference]: With dead ends: 26116 [2021-11-02 22:40:21,520 INFO L226 Difference]: Without dead ends: 19449 [2021-11-02 22:40:21,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19449 states. [2021-11-02 22:40:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19449 to 19303. [2021-11-02 22:40:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2778468552481608) internal successors, (24665), 19302 states have internal predecessors, (24665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24665 transitions. [2021-11-02 22:40:21,984 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24665 transitions. Word has length 174 [2021-11-02 22:40:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:21,986 INFO L470 AbstractCegarLoop]: Abstraction has 19303 states and 24665 transitions. [2021-11-02 22:40:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24665 transitions. [2021-11-02 22:40:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-02 22:40:21,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:21,995 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:21,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:40:21,995 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1058846290, now seen corresponding path program 1 times [2021-11-02 22:40:21,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:21,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638027438] [2021-11-02 22:40:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:21,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 22:40:22,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:22,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638027438] [2021-11-02 22:40:22,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638027438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:22,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:22,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:40:22,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385857745] [2021-11-02 22:40:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:22,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:22,219 INFO L87 Difference]: Start difference. First operand 19303 states and 24665 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:27,204 INFO L93 Difference]: Finished difference Result 33881 states and 44171 transitions. [2021-11-02 22:40:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 261 [2021-11-02 22:40:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:27,260 INFO L225 Difference]: With dead ends: 33881 [2021-11-02 22:40:27,261 INFO L226 Difference]: Without dead ends: 19312 [2021-11-02 22:40:27,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2021-11-02 22:40:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 19303. [2021-11-02 22:40:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2765516526784788) internal successors, (24640), 19302 states have internal predecessors, (24640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24640 transitions. [2021-11-02 22:40:27,876 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24640 transitions. Word has length 261 [2021-11-02 22:40:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:27,877 INFO L470 AbstractCegarLoop]: Abstraction has 19303 states and 24640 transitions. [2021-11-02 22:40:27,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24640 transitions. [2021-11-02 22:40:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-02 22:40:27,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:27,884 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:27,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:40:27,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1215870024, now seen corresponding path program 1 times [2021-11-02 22:40:27,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:27,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591988517] [2021-11-02 22:40:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:27,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:28,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:28,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591988517] [2021-11-02 22:40:28,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591988517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:28,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:28,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:40:28,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592797184] [2021-11-02 22:40:28,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:28,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:28,028 INFO L87 Difference]: Start difference. First operand 19303 states and 24640 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:32,129 INFO L93 Difference]: Finished difference Result 51975 states and 67214 transitions. [2021-11-02 22:40:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 [2021-11-02 22:40:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:32,211 INFO L225 Difference]: With dead ends: 51975 [2021-11-02 22:40:32,211 INFO L226 Difference]: Without dead ends: 32674 [2021-11-02 22:40:32,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32674 states. [2021-11-02 22:40:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32674 to 31881. [2021-11-02 22:40:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31881 states, 31880 states have (on average 1.224215809284818) internal successors, (39028), 31880 states have internal predecessors, (39028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31881 states to 31881 states and 39028 transitions. [2021-11-02 22:40:32,980 INFO L78 Accepts]: Start accepts. Automaton has 31881 states and 39028 transitions. Word has length 263 [2021-11-02 22:40:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:32,981 INFO L470 AbstractCegarLoop]: Abstraction has 31881 states and 39028 transitions. [2021-11-02 22:40:32,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 31881 states and 39028 transitions. [2021-11-02 22:40:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-02 22:40:32,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:32,989 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:40:32,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -852280536, now seen corresponding path program 1 times [2021-11-02 22:40:32,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:32,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9269807] [2021-11-02 22:40:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:32,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:40:33,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:33,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9269807] [2021-11-02 22:40:33,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9269807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:33,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:33,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:40:33,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43618007] [2021-11-02 22:40:33,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:33,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:33,158 INFO L87 Difference]: Start difference. First operand 31881 states and 39028 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:37,462 INFO L93 Difference]: Finished difference Result 88168 states and 109034 transitions. [2021-11-02 22:40:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 285 [2021-11-02 22:40:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:37,615 INFO L225 Difference]: With dead ends: 88168 [2021-11-02 22:40:37,615 INFO L226 Difference]: Without dead ends: 57076 [2021-11-02 22:40:37,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-11-02 22:40:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 55492. [2021-11-02 22:40:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55492 states, 55491 states have (on average 1.1844263033645095) internal successors, (65725), 55491 states have internal predecessors, (65725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55492 states to 55492 states and 65725 transitions. [2021-11-02 22:40:38,644 INFO L78 Accepts]: Start accepts. Automaton has 55492 states and 65725 transitions. Word has length 285 [2021-11-02 22:40:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 55492 states and 65725 transitions. [2021-11-02 22:40:38,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 55492 states and 65725 transitions. [2021-11-02 22:40:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-02 22:40:38,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:38,652 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:38,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:40:38,653 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash 336538634, now seen corresponding path program 1 times [2021-11-02 22:40:38,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:38,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550661975] [2021-11-02 22:40:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:38,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 96 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:39,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550661975] [2021-11-02 22:40:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550661975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620940754] [2021-11-02 22:40:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:39,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:39,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:39,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:40:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:40:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:40:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620940754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:40,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:40:40,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-02 22:40:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133117800] [2021-11-02 22:40:40,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:40,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:40:40,036 INFO L87 Difference]: Start difference. First operand 55492 states and 65725 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:44,212 INFO L93 Difference]: Finished difference Result 110186 states and 130648 transitions. [2021-11-02 22:40:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 290 [2021-11-02 22:40:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:44,306 INFO L225 Difference]: With dead ends: 110186 [2021-11-02 22:40:44,307 INFO L226 Difference]: Without dead ends: 55483 [2021-11-02 22:40:44,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:40:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55483 states. [2021-11-02 22:40:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55483 to 55482. [2021-11-02 22:40:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55482 states, 55481 states have (on average 1.1359564535606785) internal successors, (63024), 55481 states have internal predecessors, (63024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55482 states to 55482 states and 63024 transitions. [2021-11-02 22:40:45,070 INFO L78 Accepts]: Start accepts. Automaton has 55482 states and 63024 transitions. Word has length 290 [2021-11-02 22:40:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:45,071 INFO L470 AbstractCegarLoop]: Abstraction has 55482 states and 63024 transitions. [2021-11-02 22:40:45,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 55482 states and 63024 transitions. [2021-11-02 22:40:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-02 22:40:45,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:45,334 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:45,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:45,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:45,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1502349001, now seen corresponding path program 1 times [2021-11-02 22:40:45,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:45,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421732844] [2021-11-02 22:40:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:45,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:40:45,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:45,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421732844] [2021-11-02 22:40:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421732844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:45,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:40:45,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324577891] [2021-11-02 22:40:45,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:40:45,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:40:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:45,941 INFO L87 Difference]: Start difference. First operand 55482 states and 63024 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:54,301 INFO L93 Difference]: Finished difference Result 148945 states and 170039 transitions. [2021-11-02 22:40:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:40:54,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 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) Word has length 332 [2021-11-02 22:40:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:54,449 INFO L225 Difference]: With dead ends: 148945 [2021-11-02 22:40:54,449 INFO L226 Difference]: Without dead ends: 94252 [2021-11-02 22:40:54,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94252 states. [2021-11-02 22:40:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94252 to 94129. [2021-11-02 22:40:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94129 states, 94128 states have (on average 1.129260156382798) internal successors, (106295), 94128 states have internal predecessors, (106295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94129 states to 94129 states and 106295 transitions. [2021-11-02 22:40:55,860 INFO L78 Accepts]: Start accepts. Automaton has 94129 states and 106295 transitions. Word has length 332 [2021-11-02 22:40:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:55,861 INFO L470 AbstractCegarLoop]: Abstraction has 94129 states and 106295 transitions. [2021-11-02 22:40:55,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 94129 states and 106295 transitions. [2021-11-02 22:40:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-11-02 22:40:55,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:55,875 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:55,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:40:55,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1533815282, now seen corresponding path program 1 times [2021-11-02 22:40:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:55,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651926666] [2021-11-02 22:40:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:55,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 237 proven. 110 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:40:56,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651926666] [2021-11-02 22:40:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651926666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:40:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647010084] [2021-11-02 22:40:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:56,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:56,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:40:56,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:40:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:40:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:40:57,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647010084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:57,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:40:57,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-02 22:40:57,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015597260] [2021-11-02 22:40:57,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:57,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:40:57,926 INFO L87 Difference]: Start difference. First operand 94129 states and 106295 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:02,059 INFO L93 Difference]: Finished difference Result 185105 states and 208988 transitions. [2021-11-02 22:41:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 361 [2021-11-02 22:41:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:02,168 INFO L225 Difference]: With dead ends: 185105 [2021-11-02 22:41:02,169 INFO L226 Difference]: Without dead ends: 91765 [2021-11-02 22:41:02,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:41:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91765 states. [2021-11-02 22:41:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91765 to 91764. [2021-11-02 22:41:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91764 states, 91763 states have (on average 1.0985800377058292) internal successors, (100809), 91763 states have internal predecessors, (100809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91764 states to 91764 states and 100809 transitions. [2021-11-02 22:41:03,767 INFO L78 Accepts]: Start accepts. Automaton has 91764 states and 100809 transitions. Word has length 361 [2021-11-02 22:41:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:03,768 INFO L470 AbstractCegarLoop]: Abstraction has 91764 states and 100809 transitions. [2021-11-02 22:41:03,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 91764 states and 100809 transitions. [2021-11-02 22:41:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-02 22:41:03,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:03,776 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:03,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:03,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:03,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1478632373, now seen corresponding path program 1 times [2021-11-02 22:41:03,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:03,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713319587] [2021-11-02 22:41:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:03,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-02 22:41:04,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:04,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713319587] [2021-11-02 22:41:04,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713319587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:04,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:04,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:04,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924067829] [2021-11-02 22:41:04,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:04,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:04,188 INFO L87 Difference]: Start difference. First operand 91764 states and 100809 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:08,901 INFO L93 Difference]: Finished difference Result 216604 states and 237130 transitions. [2021-11-02 22:41:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 378 [2021-11-02 22:41:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:09,076 INFO L225 Difference]: With dead ends: 216604 [2021-11-02 22:41:09,076 INFO L226 Difference]: Without dead ends: 125629 [2021-11-02 22:41:09,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125629 states. [2021-11-02 22:41:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125629 to 119301. [2021-11-02 22:41:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119301 states, 119300 states have (on average 1.084048616932104) internal successors, (129327), 119300 states have internal predecessors, (129327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119301 states to 119301 states and 129327 transitions. [2021-11-02 22:41:11,127 INFO L78 Accepts]: Start accepts. Automaton has 119301 states and 129327 transitions. Word has length 378 [2021-11-02 22:41:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:11,129 INFO L470 AbstractCegarLoop]: Abstraction has 119301 states and 129327 transitions. [2021-11-02 22:41:11,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 119301 states and 129327 transitions. [2021-11-02 22:41:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-02 22:41:11,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:11,178 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:11,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:41:11,178 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1911303454, now seen corresponding path program 1 times [2021-11-02 22:41:11,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:11,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626655540] [2021-11-02 22:41:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-02 22:41:11,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:11,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626655540] [2021-11-02 22:41:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626655540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:11,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:11,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585960310] [2021-11-02 22:41:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:11,420 INFO L87 Difference]: Start difference. First operand 119301 states and 129327 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:16,461 INFO L93 Difference]: Finished difference Result 270884 states and 295249 transitions. [2021-11-02 22:41:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 480 [2021-11-02 22:41:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:17,018 INFO L225 Difference]: With dead ends: 270884 [2021-11-02 22:41:17,019 INFO L226 Difference]: Without dead ends: 150798 [2021-11-02 22:41:17,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150798 states. [2021-11-02 22:41:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150798 to 148419. [2021-11-02 22:41:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148419 states, 148418 states have (on average 1.0721543209044726) internal successors, (159127), 148418 states have internal predecessors, (159127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148419 states to 148419 states and 159127 transitions. [2021-11-02 22:41:19,216 INFO L78 Accepts]: Start accepts. Automaton has 148419 states and 159127 transitions. Word has length 480 [2021-11-02 22:41:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:19,217 INFO L470 AbstractCegarLoop]: Abstraction has 148419 states and 159127 transitions. [2021-11-02 22:41:19,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 148419 states and 159127 transitions. [2021-11-02 22:41:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-02 22:41:19,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:19,243 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:41:19,244 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1335862030, now seen corresponding path program 1 times [2021-11-02 22:41:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:19,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775068877] [2021-11-02 22:41:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:19,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-02 22:41:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775068877] [2021-11-02 22:41:19,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775068877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:19,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:19,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:19,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038950857] [2021-11-02 22:41:19,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:19,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:19,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:19,453 INFO L87 Difference]: Start difference. First operand 148419 states and 159127 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:25,244 INFO L93 Difference]: Finished difference Result 326750 states and 352214 transitions. [2021-11-02 22:41:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:25,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 489 [2021-11-02 22:41:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:25,542 INFO L225 Difference]: With dead ends: 326750 [2021-11-02 22:41:25,542 INFO L226 Difference]: Without dead ends: 179120 [2021-11-02 22:41:25,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179120 states. [2021-11-02 22:41:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179120 to 177526. [2021-11-02 22:41:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177526 states, 177525 states have (on average 1.0740684410646388) internal successors, (190674), 177525 states have internal predecessors, (190674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177526 states to 177526 states and 190674 transitions. [2021-11-02 22:41:28,123 INFO L78 Accepts]: Start accepts. Automaton has 177526 states and 190674 transitions. Word has length 489 [2021-11-02 22:41:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:28,124 INFO L470 AbstractCegarLoop]: Abstraction has 177526 states and 190674 transitions. [2021-11-02 22:41:28,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 177526 states and 190674 transitions. [2021-11-02 22:41:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-02 22:41:28,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:28,146 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:28,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:41:28,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1877826396, now seen corresponding path program 1 times [2021-11-02 22:41:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:28,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991449569] [2021-11-02 22:41:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:28,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 22:41:28,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:28,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991449569] [2021-11-02 22:41:28,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991449569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:28,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:28,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263528107] [2021-11-02 22:41:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:28,370 INFO L87 Difference]: Start difference. First operand 177526 states and 190674 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:34,085 INFO L93 Difference]: Finished difference Result 344766 states and 371599 transitions. [2021-11-02 22:41:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 506 [2021-11-02 22:41:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:34,497 INFO L225 Difference]: With dead ends: 344766 [2021-11-02 22:41:34,498 INFO L226 Difference]: Without dead ends: 187710 [2021-11-02 22:41:34,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187710 states. [2021-11-02 22:41:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187710 to 187709. [2021-11-02 22:41:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187709 states, 187708 states have (on average 1.068846293178767) internal successors, (200631), 187708 states have internal predecessors, (200631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187709 states to 187709 states and 200631 transitions. [2021-11-02 22:41:37,340 INFO L78 Accepts]: Start accepts. Automaton has 187709 states and 200631 transitions. Word has length 506 [2021-11-02 22:41:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:37,341 INFO L470 AbstractCegarLoop]: Abstraction has 187709 states and 200631 transitions. [2021-11-02 22:41:37,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 187709 states and 200631 transitions. [2021-11-02 22:41:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-11-02 22:41:37,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:37,364 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:37,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:41:37,364 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1474042506, now seen corresponding path program 1 times [2021-11-02 22:41:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:37,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067156778] [2021-11-02 22:41:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:37,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 336 proven. 110 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:41:37,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:37,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067156778] [2021-11-02 22:41:37,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067156778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:37,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452429085] [2021-11-02 22:41:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:37,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:37,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:41:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:41:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-02 22:41:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452429085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:42,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:42,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-02 22:41:42,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108900735] [2021-11-02 22:41:42,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:42,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:42,195 INFO L87 Difference]: Start difference. First operand 187709 states and 200631 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:47,420 INFO L93 Difference]: Finished difference Result 360472 states and 386007 transitions. [2021-11-02 22:41:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 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 551 [2021-11-02 22:41:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:47,644 INFO L225 Difference]: With dead ends: 360472 [2021-11-02 22:41:47,644 INFO L226 Difference]: Without dead ends: 192446 [2021-11-02 22:41:47,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192446 states. [2021-11-02 22:41:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192446 to 190074. [2021-11-02 22:41:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190074 states, 190073 states have (on average 1.0633388224524263) internal successors, (202112), 190073 states have internal predecessors, (202112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190074 states to 190074 states and 202112 transitions. [2021-11-02 22:41:50,566 INFO L78 Accepts]: Start accepts. Automaton has 190074 states and 202112 transitions. Word has length 551 [2021-11-02 22:41:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:50,566 INFO L470 AbstractCegarLoop]: Abstraction has 190074 states and 202112 transitions. [2021-11-02 22:41:50,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 190074 states and 202112 transitions. [2021-11-02 22:41:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-11-02 22:41:50,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:50,585 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:50,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 22:41:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623b0201-fb2f-42af-a6d3-4135a92666b2/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:50,791 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1217855569, now seen corresponding path program 1 times [2021-11-02 22:41:50,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:50,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146476134] [2021-11-02 22:41:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:50,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2021-11-02 22:41:51,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:51,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146476134] [2021-11-02 22:41:51,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146476134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:51,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:51,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:51,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460807596] [2021-11-02 22:41:51,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:51,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:51,034 INFO L87 Difference]: Start difference. First operand 190074 states and 202112 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)