./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3 --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 f33fbcbeea92375203458d523a51a600f74086f3 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:14:55,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:14:55,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:14:55,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:14:55,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:14:55,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:14:55,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:14:55,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:14:55,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:14:55,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:14:55,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:14:55,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:14:55,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:14:55,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:14:55,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:14:55,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:14:55,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:14:55,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:14:55,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:14:55,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:14:55,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:14:55,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:14:55,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:14:55,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:14:55,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:14:55,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:14:55,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:14:55,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:14:55,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:14:55,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:14:55,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:14:55,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:14:55,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:14:55,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:14:55,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:14:55,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:14:55,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:14:55,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:14:55,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:14:55,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:14:55,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:14:55,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:14:55,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:14:55,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:14:55,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:14:55,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:14:55,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:14:55,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:14:55,301 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:14:55,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:14:55,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:14:55,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:14:55,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:14:55,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:14:55,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:14:55,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:14:55,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:14:55,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:14:55,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:14:55,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:14:55,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:14:55,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:14:55,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:14:55,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:14:55,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:55,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:14:55,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:14:55,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:14:55,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:14:55,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:14:55,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:14:55,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:14:55,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:14:55,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:14:55,313 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_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f33fbcbeea92375203458d523a51a600f74086f3 [2021-10-15 20:14:55,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:14:55,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:14:55,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:14:55,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:14:55,671 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:14:55,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label16.c [2021-10-15 20:14:55,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/data/c7f9c1e43/a984e65a78404beab63a2794170bfa51/FLAG0d2562e79 [2021-10-15 20:14:56,414 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:14:56,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/sv-benchmarks/c/eca-rers2012/Problem14_label16.c [2021-10-15 20:14:56,428 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/data/c7f9c1e43/a984e65a78404beab63a2794170bfa51/FLAG0d2562e79 [2021-10-15 20:14:56,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/data/c7f9c1e43/a984e65a78404beab63a2794170bfa51 [2021-10-15 20:14:56,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:14:56,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:14:56,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:56,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:14:56,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:14:56,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:56" (1/1) ... [2021-10-15 20:14:56,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309fb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:56, skipping insertion in model container [2021-10-15 20:14:56,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:56" (1/1) ... [2021-10-15 20:14:56,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:14:56,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:14:57,045 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_b36e2636-ad33-4363-a84a-8deef873bc37/sv-benchmarks/c/eca-rers2012/Problem14_label16.c[4807,4820] [2021-10-15 20:14:57,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:57,369 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:14:57,398 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_b36e2636-ad33-4363-a84a-8deef873bc37/sv-benchmarks/c/eca-rers2012/Problem14_label16.c[4807,4820] [2021-10-15 20:14:57,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:57,620 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:14:57,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57 WrapperNode [2021-10-15 20:14:57,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:57,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:57,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:14:57,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:14:57,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:57,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:14:57,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:14:57,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:14:57,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:14:57,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:14:57,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:14:57,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:14:57,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (1/1) ... [2021-10-15 20:14:57,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:57,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:14:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:14:58,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:14:58,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:14:58,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:14:58,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:14:59,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:14:59,602 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:14:59,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:59 BoogieIcfgContainer [2021-10-15 20:14:59,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:14:59,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:14:59,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:14:59,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:14:59,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:14:56" (1/3) ... [2021-10-15 20:14:59,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f897820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:59, skipping insertion in model container [2021-10-15 20:14:59,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:57" (2/3) ... [2021-10-15 20:14:59,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f897820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:59, skipping insertion in model container [2021-10-15 20:14:59,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:59" (3/3) ... [2021-10-15 20:14:59,618 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label16.c [2021-10-15 20:14:59,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:14:59,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:14:59,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:14:59,714 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, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:14:59,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:14:59,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:59,835 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 20:14:59,836 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:59,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 20:14:59,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:59,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 20:14:59,869 INFO L129 PetriNetUnfolder]: 42/130 cut-off events. [2021-10-15 20:14:59,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:59,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:59,871 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 20:14:59,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-10-15 20:14:59,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:59,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229340278] [2021-10-15 20:14:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:59,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:00,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:00,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229340278] [2021-10-15 20:15:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229340278] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:00,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:00,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:15:00,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620266703] [2021-10-15 20:15:00,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:00,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:00,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:00,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:00,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:00,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:00,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:01,624 INFO L129 PetriNetUnfolder]: 212/631 cut-off events. [2021-10-15 20:15:01,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:01,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 631 events. 212/631 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 599 event pairs, 0 based on Foata normal form. 61/420 useless extension candidates. Maximal degree in co-relation 1. Up to 353 conditions per place. [2021-10-15 20:15:01,637 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 436 selfloop transitions, 102 changer transitions 85/628 dead transitions. [2021-10-15 20:15:01,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 628 transitions, 2502 flow [2021-10-15 20:15:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2021-10-15 20:15:01,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6208530805687204 [2021-10-15 20:15:01,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2021-10-15 20:15:01,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2021-10-15 20:15:01,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:01,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2021-10-15 20:15:01,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,689 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 3 states and 786 transitions. [2021-10-15 20:15:01,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 628 transitions, 2502 flow [2021-10-15 20:15:01,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 628 transitions, 2502 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:01,737 INFO L242 Difference]: Finished difference. Result has 246 places, 368 transitions, 1316 flow [2021-10-15 20:15:01,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1316, PETRI_PLACES=246, PETRI_TRANSITIONS=368} [2021-10-15 20:15:01,741 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 4 predicate places. [2021-10-15 20:15:01,741 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 368 transitions, 1316 flow [2021-10-15 20:15:01,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:01,742 INFO L254 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:01,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:15:01,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1122061351, now seen corresponding path program 1 times [2021-10-15 20:15:01,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:01,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406865075] [2021-10-15 20:15:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:01,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:01,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:01,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406865075] [2021-10-15 20:15:01,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406865075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:01,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:01,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:15:01,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061260793] [2021-10-15 20:15:01,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:01,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:01,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:01,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 368 transitions, 1316 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:01,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:01,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:02,968 INFO L129 PetriNetUnfolder]: 253/968 cut-off events. [2021-10-15 20:15:02,968 INFO L130 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2021-10-15 20:15:02,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 968 events. 253/968 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1742 event pairs, 0 based on Foata normal form. 121/1089 useless extension candidates. Maximal degree in co-relation 923. Up to 482 conditions per place. [2021-10-15 20:15:02,977 INFO L132 encePairwiseOnDemand]: 328/422 looper letters, 521 selfloop transitions, 83 changer transitions 0/609 dead transitions. [2021-10-15 20:15:02,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 609 transitions, 3210 flow [2021-10-15 20:15:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2021-10-15 20:15:02,981 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47788309636650866 [2021-10-15 20:15:02,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2021-10-15 20:15:02,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2021-10-15 20:15:02,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:02,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2021-10-15 20:15:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:02,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:02,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:02,994 INFO L186 Difference]: Start difference. First operand has 246 places, 368 transitions, 1316 flow. Second operand 3 states and 605 transitions. [2021-10-15 20:15:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 609 transitions, 3210 flow [2021-10-15 20:15:03,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 609 transitions, 2934 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:03,030 INFO L242 Difference]: Finished difference. Result has 188 places, 395 transitions, 1738 flow [2021-10-15 20:15:03,031 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1738, PETRI_PLACES=188, PETRI_TRANSITIONS=395} [2021-10-15 20:15:03,038 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -54 predicate places. [2021-10-15 20:15:03,039 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 395 transitions, 1738 flow [2021-10-15 20:15:03,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:03,039 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:03,039 INFO L254 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:03,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:15:03,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1078900381, now seen corresponding path program 1 times [2021-10-15 20:15:03,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:03,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093913485] [2021-10-15 20:15:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:03,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:03,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093913485] [2021-10-15 20:15:03,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093913485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:03,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:03,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719805526] [2021-10-15 20:15:03,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:03,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:03,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:03,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 395 transitions, 1738 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:03,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:03,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:03,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:04,689 INFO L129 PetriNetUnfolder]: 295/1544 cut-off events. [2021-10-15 20:15:04,690 INFO L130 PetriNetUnfolder]: For 420/420 co-relation queries the response was YES. [2021-10-15 20:15:04,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3636 conditions, 1544 events. 295/1544 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3737 event pairs, 0 based on Foata normal form. 60/1604 useless extension candidates. Maximal degree in co-relation 2061. Up to 988 conditions per place. [2021-10-15 20:15:04,699 INFO L132 encePairwiseOnDemand]: 385/422 looper letters, 738 selfloop transitions, 44 changer transitions 0/787 dead transitions. [2021-10-15 20:15:04,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 787 transitions, 4192 flow [2021-10-15 20:15:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2021-10-15 20:15:04,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44135071090047395 [2021-10-15 20:15:04,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2021-10-15 20:15:04,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2021-10-15 20:15:04,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:04,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2021-10-15 20:15:04,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,714 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,714 INFO L186 Difference]: Start difference. First operand has 188 places, 395 transitions, 1738 flow. Second operand 4 states and 745 transitions. [2021-10-15 20:15:04,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 787 transitions, 4192 flow [2021-10-15 20:15:04,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 787 transitions, 4020 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:04,743 INFO L242 Difference]: Finished difference. Result has 191 places, 434 transitions, 2047 flow [2021-10-15 20:15:04,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2047, PETRI_PLACES=191, PETRI_TRANSITIONS=434} [2021-10-15 20:15:04,744 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -51 predicate places. [2021-10-15 20:15:04,744 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 434 transitions, 2047 flow [2021-10-15 20:15:04,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:04,746 INFO L254 CegarLoopForPetriNet]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:15:04,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:15:04,747 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1282005041, now seen corresponding path program 1 times [2021-10-15 20:15:04,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:04,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346253002] [2021-10-15 20:15:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:04,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 20:15:04,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:04,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346253002] [2021-10-15 20:15:04,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346253002] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:04,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:04,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:04,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986967837] [2021-10-15 20:15:04,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:04,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:04,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:04,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 434 transitions, 2047 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:04,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:04,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:06,275 INFO L129 PetriNetUnfolder]: 348/1982 cut-off events. [2021-10-15 20:15:06,276 INFO L130 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2021-10-15 20:15:06,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4776 conditions, 1982 events. 348/1982 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3776 event pairs, 0 based on Foata normal form. 13/1995 useless extension candidates. Maximal degree in co-relation 3990. Up to 890 conditions per place. [2021-10-15 20:15:06,287 INFO L132 encePairwiseOnDemand]: 351/422 looper letters, 490 selfloop transitions, 15 changer transitions 178/688 dead transitions. [2021-10-15 20:15:06,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 688 transitions, 4199 flow [2021-10-15 20:15:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2021-10-15 20:15:06,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33175355450236965 [2021-10-15 20:15:06,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2021-10-15 20:15:06,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2021-10-15 20:15:06,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:06,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2021-10-15 20:15:06,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:06,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:06,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:06,301 INFO L186 Difference]: Start difference. First operand has 191 places, 434 transitions, 2047 flow. Second operand 4 states and 560 transitions. [2021-10-15 20:15:06,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 688 transitions, 4199 flow [2021-10-15 20:15:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 688 transitions, 4189 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:06,340 INFO L242 Difference]: Finished difference. Result has 196 places, 331 transitions, 1515 flow [2021-10-15 20:15:06,341 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1515, PETRI_PLACES=196, PETRI_TRANSITIONS=331} [2021-10-15 20:15:06,341 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -46 predicate places. [2021-10-15 20:15:06,341 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 331 transitions, 1515 flow [2021-10-15 20:15:06,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:06,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:06,343 INFO L254 CegarLoopForPetriNet]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:15:06,343 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1376977600, now seen corresponding path program 1 times [2021-10-15 20:15:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:06,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374033914] [2021-10-15 20:15:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:06,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 179 proven. 130 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-15 20:15:06,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:06,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374033914] [2021-10-15 20:15:06,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374033914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:06,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609895375] [2021-10-15 20:15:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:06,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:06,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:06,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:15:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:06,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:15:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-15 20:15:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609895375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:07,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 20:15:07,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566551813] [2021-10-15 20:15:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:15:07,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:07,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 331 transitions, 1515 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:07,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:07,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:07,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:09,021 INFO L129 PetriNetUnfolder]: 237/2198 cut-off events. [2021-10-15 20:15:09,022 INFO L130 PetriNetUnfolder]: For 872/872 co-relation queries the response was YES. [2021-10-15 20:15:09,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5025 conditions, 2198 events. 237/2198 cut-off events. For 872/872 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5435 event pairs, 0 based on Foata normal form. 83/2281 useless extension candidates. Maximal degree in co-relation 4422. Up to 1782 conditions per place. [2021-10-15 20:15:09,034 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 445 selfloop transitions, 112 changer transitions 0/562 dead transitions. [2021-10-15 20:15:09,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 562 transitions, 3359 flow [2021-10-15 20:15:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:15:09,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:15:09,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:15:09,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:15:09,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:09,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:15:09,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:09,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:09,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:09,045 INFO L186 Difference]: Start difference. First operand has 196 places, 331 transitions, 1515 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:15:09,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 562 transitions, 3359 flow [2021-10-15 20:15:09,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 562 transitions, 3297 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:09,068 INFO L242 Difference]: Finished difference. Result has 197 places, 387 transitions, 2437 flow [2021-10-15 20:15:09,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2437, PETRI_PLACES=197, PETRI_TRANSITIONS=387} [2021-10-15 20:15:09,069 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -45 predicate places. [2021-10-15 20:15:09,069 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 387 transitions, 2437 flow [2021-10-15 20:15:09,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:09,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:09,070 INFO L254 CegarLoopForPetriNet]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:09,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:09,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:09,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash -310758602, now seen corresponding path program 1 times [2021-10-15 20:15:09,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:09,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069611838] [2021-10-15 20:15:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:09,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-15 20:15:09,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:09,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069611838] [2021-10-15 20:15:09,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069611838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:09,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:09,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:09,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413450891] [2021-10-15 20:15:09,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:09,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:09,495 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:09,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 387 transitions, 2437 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:09,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:09,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:09,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:10,941 INFO L129 PetriNetUnfolder]: 276/2593 cut-off events. [2021-10-15 20:15:10,942 INFO L130 PetriNetUnfolder]: For 1949/1949 co-relation queries the response was YES. [2021-10-15 20:15:10,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6249 conditions, 2593 events. 276/2593 cut-off events. For 1949/1949 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6709 event pairs, 0 based on Foata normal form. 32/2625 useless extension candidates. Maximal degree in co-relation 5604. Up to 2010 conditions per place. [2021-10-15 20:15:10,956 INFO L132 encePairwiseOnDemand]: 371/422 looper letters, 539 selfloop transitions, 57 changer transitions 0/601 dead transitions. [2021-10-15 20:15:10,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 601 transitions, 4367 flow [2021-10-15 20:15:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2021-10-15 20:15:10,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3941548183254344 [2021-10-15 20:15:10,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2021-10-15 20:15:10,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2021-10-15 20:15:10,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:10,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2021-10-15 20:15:10,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:10,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:10,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:10,966 INFO L186 Difference]: Start difference. First operand has 197 places, 387 transitions, 2437 flow. Second operand 3 states and 499 transitions. [2021-10-15 20:15:10,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 601 transitions, 4367 flow [2021-10-15 20:15:10,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 601 transitions, 3717 flow, removed 189 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:10,992 INFO L242 Difference]: Finished difference. Result has 198 places, 426 transitions, 2480 flow [2021-10-15 20:15:10,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2480, PETRI_PLACES=198, PETRI_TRANSITIONS=426} [2021-10-15 20:15:10,993 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -44 predicate places. [2021-10-15 20:15:10,994 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 426 transitions, 2480 flow [2021-10-15 20:15:10,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:10,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:10,994 INFO L254 CegarLoopForPetriNet]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-10-15 20:15:10,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:15:10,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1990614980, now seen corresponding path program 1 times [2021-10-15 20:15:10,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:10,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137779383] [2021-10-15 20:15:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:10,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:11,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:11,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137779383] [2021-10-15 20:15:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137779383] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:11,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:11,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797472600] [2021-10-15 20:15:11,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:11,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:11,147 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:11,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 426 transitions, 2480 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:11,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:11,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:11,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:13,059 INFO L129 PetriNetUnfolder]: 323/2996 cut-off events. [2021-10-15 20:15:13,059 INFO L130 PetriNetUnfolder]: For 1568/1568 co-relation queries the response was YES. [2021-10-15 20:15:13,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7032 conditions, 2996 events. 323/2996 cut-off events. For 1568/1568 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9012 event pairs, 0 based on Foata normal form. 67/3063 useless extension candidates. Maximal degree in co-relation 6438. Up to 2015 conditions per place. [2021-10-15 20:15:13,075 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 548 selfloop transitions, 103 changer transitions 0/656 dead transitions. [2021-10-15 20:15:13,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 656 transitions, 4559 flow [2021-10-15 20:15:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:15:13,079 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:15:13,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:15:13,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:15:13,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:13,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:15:13,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:13,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:13,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:13,085 INFO L186 Difference]: Start difference. First operand has 198 places, 426 transitions, 2480 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:15:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 656 transitions, 4559 flow [2021-10-15 20:15:13,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 656 transitions, 4379 flow, removed 58 selfloop flow, removed 1 redundant places. [2021-10-15 20:15:13,113 INFO L242 Difference]: Finished difference. Result has 201 places, 481 transitions, 3345 flow [2021-10-15 20:15:13,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3345, PETRI_PLACES=201, PETRI_TRANSITIONS=481} [2021-10-15 20:15:13,114 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -41 predicate places. [2021-10-15 20:15:13,114 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 481 transitions, 3345 flow [2021-10-15 20:15:13,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:13,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:13,115 INFO L254 CegarLoopForPetriNet]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:13,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:15:13,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1716712479, now seen corresponding path program 1 times [2021-10-15 20:15:13,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:13,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895689735] [2021-10-15 20:15:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:13,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:13,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:13,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895689735] [2021-10-15 20:15:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895689735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:13,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:13,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:13,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081146787] [2021-10-15 20:15:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:13,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:13,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 481 transitions, 3345 flow. 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) [2021-10-15 20:15:13,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:13,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:13,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:15,141 INFO L129 PetriNetUnfolder]: 405/3434 cut-off events. [2021-10-15 20:15:15,141 INFO L130 PetriNetUnfolder]: For 2773/2773 co-relation queries the response was YES. [2021-10-15 20:15:15,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 3434 events. 405/3434 cut-off events. For 2773/2773 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11577 event pairs, 0 based on Foata normal form. 32/3466 useless extension candidates. Maximal degree in co-relation 7763. Up to 1854 conditions per place. [2021-10-15 20:15:15,158 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 544 selfloop transitions, 189 changer transitions 0/738 dead transitions. [2021-10-15 20:15:15,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 738 transitions, 5931 flow [2021-10-15 20:15:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:15:15,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:15:15,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:15:15,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:15:15,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:15,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:15:15,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:15,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:15,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:15,169 INFO L186 Difference]: Start difference. First operand has 201 places, 481 transitions, 3345 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:15:15,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 738 transitions, 5931 flow [2021-10-15 20:15:15,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 738 transitions, 5707 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:15,207 INFO L242 Difference]: Finished difference. Result has 203 places, 563 transitions, 4849 flow [2021-10-15 20:15:15,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4849, PETRI_PLACES=203, PETRI_TRANSITIONS=563} [2021-10-15 20:15:15,208 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -39 predicate places. [2021-10-15 20:15:15,209 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 563 transitions, 4849 flow [2021-10-15 20:15:15,209 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) [2021-10-15 20:15:15,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:15,210 INFO L254 CegarLoopForPetriNet]: 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:15:15,210 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -772653983, now seen corresponding path program 1 times [2021-10-15 20:15:15,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:15,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767102576] [2021-10-15 20:15:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:15,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:15,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:15,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767102576] [2021-10-15 20:15:15,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767102576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:15,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:15,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:15,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182251834] [2021-10-15 20:15:15,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:15,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:15,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:15,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 563 transitions, 4849 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:15,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:15,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:15,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:17,826 INFO L129 PetriNetUnfolder]: 540/4637 cut-off events. [2021-10-15 20:15:17,826 INFO L130 PetriNetUnfolder]: For 6257/6257 co-relation queries the response was YES. [2021-10-15 20:15:17,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11873 conditions, 4637 events. 540/4637 cut-off events. For 6257/6257 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 20569 event pairs, 0 based on Foata normal form. 58/4695 useless extension candidates. Maximal degree in co-relation 11110. Up to 2596 conditions per place. [2021-10-15 20:15:17,847 INFO L132 encePairwiseOnDemand]: 348/422 looper letters, 645 selfloop transitions, 223 changer transitions 0/873 dead transitions. [2021-10-15 20:15:17,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 873 transitions, 8564 flow [2021-10-15 20:15:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:15:17,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:15:17,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:15:17,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:15:17,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:17,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:15:17,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,858 INFO L186 Difference]: Start difference. First operand has 203 places, 563 transitions, 4849 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:15:17,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 873 transitions, 8564 flow [2021-10-15 20:15:17,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 873 transitions, 7772 flow, removed 138 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:17,911 INFO L242 Difference]: Finished difference. Result has 205 places, 683 transitions, 6748 flow [2021-10-15 20:15:17,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6748, PETRI_PLACES=205, PETRI_TRANSITIONS=683} [2021-10-15 20:15:17,912 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -37 predicate places. [2021-10-15 20:15:17,912 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 683 transitions, 6748 flow [2021-10-15 20:15:17,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:17,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:17,913 INFO L254 CegarLoopForPetriNet]: 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, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:17,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:15:17,914 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -9033149, now seen corresponding path program 1 times [2021-10-15 20:15:17,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:17,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693143733] [2021-10-15 20:15:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:17,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-10-15 20:15:18,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:18,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693143733] [2021-10-15 20:15:18,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693143733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:18,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:18,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:18,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841668773] [2021-10-15 20:15:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:18,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:18,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:18,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:18,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:18,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 683 transitions, 6748 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:18,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:18,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:20,895 INFO L129 PetriNetUnfolder]: 556/4889 cut-off events. [2021-10-15 20:15:20,896 INFO L130 PetriNetUnfolder]: For 6938/6938 co-relation queries the response was YES. [2021-10-15 20:15:20,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 4889 events. 556/4889 cut-off events. For 6938/6938 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 22358 event pairs, 0 based on Foata normal form. 2/4891 useless extension candidates. Maximal degree in co-relation 11914. Up to 4391 conditions per place. [2021-10-15 20:15:20,910 INFO L132 encePairwiseOnDemand]: 391/422 looper letters, 682 selfloop transitions, 26 changer transitions 188/901 dead transitions. [2021-10-15 20:15:20,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 901 transitions, 9157 flow [2021-10-15 20:15:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-10-15 20:15:20,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.29798578199052134 [2021-10-15 20:15:20,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-10-15 20:15:20,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-10-15 20:15:20,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:20,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-10-15 20:15:20,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:20,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:20,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:20,922 INFO L186 Difference]: Start difference. First operand has 205 places, 683 transitions, 6748 flow. Second operand 4 states and 503 transitions. [2021-10-15 20:15:20,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 901 transitions, 9157 flow [2021-10-15 20:15:20,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 901 transitions, 8665 flow, removed 20 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:20,977 INFO L242 Difference]: Finished difference. Result has 209 places, 538 transitions, 4747 flow [2021-10-15 20:15:20,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4747, PETRI_PLACES=209, PETRI_TRANSITIONS=538} [2021-10-15 20:15:20,978 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 20:15:20,979 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 538 transitions, 4747 flow [2021-10-15 20:15:20,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:20,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:20,980 INFO L254 CegarLoopForPetriNet]: 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-15 20:15:20,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:15:20,980 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash 140749320, now seen corresponding path program 1 times [2021-10-15 20:15:20,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:20,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344129447] [2021-10-15 20:15:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:20,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2021-10-15 20:15:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344129447] [2021-10-15 20:15:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344129447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621552340] [2021-10-15 20:15:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:21,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:21,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:15:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:15:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-10-15 20:15:23,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621552340] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:23,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:23,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 20:15:23,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787412077] [2021-10-15 20:15:23,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:23,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:15:23,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:23,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 538 transitions, 4747 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:23,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:23,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:23,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:25,982 INFO L129 PetriNetUnfolder]: 479/5822 cut-off events. [2021-10-15 20:15:25,982 INFO L130 PetriNetUnfolder]: For 5791/5791 co-relation queries the response was YES. [2021-10-15 20:15:25,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14102 conditions, 5822 events. 479/5822 cut-off events. For 5791/5791 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 31915 event pairs, 0 based on Foata normal form. 2/5824 useless extension candidates. Maximal degree in co-relation 13511. Up to 3373 conditions per place. [2021-10-15 20:15:26,002 INFO L132 encePairwiseOnDemand]: 374/422 looper letters, 561 selfloop transitions, 239 changer transitions 0/805 dead transitions. [2021-10-15 20:15:26,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 805 transitions, 7951 flow [2021-10-15 20:15:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:15:26,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:15:26,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:15:26,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:15:26,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:26,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:15:26,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,011 INFO L186 Difference]: Start difference. First operand has 209 places, 538 transitions, 4747 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:15:26,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 805 transitions, 7951 flow [2021-10-15 20:15:26,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 805 transitions, 7857 flow, removed 15 selfloop flow, removed 3 redundant places. [2021-10-15 20:15:26,054 INFO L242 Difference]: Finished difference. Result has 209 places, 630 transitions, 7051 flow [2021-10-15 20:15:26,055 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7051, PETRI_PLACES=209, PETRI_TRANSITIONS=630} [2021-10-15 20:15:26,055 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 20:15:26,056 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 630 transitions, 7051 flow [2021-10-15 20:15:26,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:26,057 INFO L254 CegarLoopForPetriNet]: 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:26,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:26,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:26,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash -352344850, now seen corresponding path program 1 times [2021-10-15 20:15:26,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:26,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441674049] [2021-10-15 20:15:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 883 proven. 11 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-10-15 20:15:26,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:26,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441674049] [2021-10-15 20:15:26,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441674049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:26,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885394133] [2021-10-15 20:15:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:26,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:26,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:15:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:15:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2021-10-15 20:15:28,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885394133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:28,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:28,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:15:28,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057784063] [2021-10-15 20:15:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:28,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:15:28,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:28,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 630 transitions, 7051 flow. Second operand has 3 states, 3 states have (on average 58.0) 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) [2021-10-15 20:15:28,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:28,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:28,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:31,972 INFO L129 PetriNetUnfolder]: 569/6980 cut-off events. [2021-10-15 20:15:31,973 INFO L130 PetriNetUnfolder]: For 11074/11074 co-relation queries the response was YES. [2021-10-15 20:15:31,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17581 conditions, 6980 events. 569/6980 cut-off events. For 11074/11074 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 42895 event pairs, 0 based on Foata normal form. 1/6981 useless extension candidates. Maximal degree in co-relation 16906. Up to 4701 conditions per place. [2021-10-15 20:15:32,002 INFO L132 encePairwiseOnDemand]: 383/422 looper letters, 647 selfloop transitions, 240 changer transitions 0/892 dead transitions. [2021-10-15 20:15:32,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 892 transitions, 10594 flow [2021-10-15 20:15:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:15:32,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:15:32,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:32,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,012 INFO L186 Difference]: Start difference. First operand has 209 places, 630 transitions, 7051 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:15:32,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 892 transitions, 10594 flow [2021-10-15 20:15:32,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 892 transitions, 10014 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:32,077 INFO L242 Difference]: Finished difference. Result has 211 places, 717 transitions, 9026 flow [2021-10-15 20:15:32,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9026, PETRI_PLACES=211, PETRI_TRANSITIONS=717} [2021-10-15 20:15:32,079 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -31 predicate places. [2021-10-15 20:15:32,079 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 717 transitions, 9026 flow [2021-10-15 20:15:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) 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) [2021-10-15 20:15:32,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:32,080 INFO L254 CegarLoopForPetriNet]: 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, 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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:32,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:32,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:15:32,309 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 774587592, now seen corresponding path program 1 times [2021-10-15 20:15:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:32,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295574222] [2021-10-15 20:15:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:32,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 864 proven. 195 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-15 20:15:32,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:32,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295574222] [2021-10-15 20:15:32,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295574222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:32,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270709386] [2021-10-15 20:15:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:32,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:32,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:32,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:15:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:15:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2021-10-15 20:15:34,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270709386] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:34,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:34,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:15:34,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623027739] [2021-10-15 20:15:34,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:34,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:34,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:15:34,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:34,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 717 transitions, 9026 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:34,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:34,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:34,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:39,234 INFO L129 PetriNetUnfolder]: 682/8337 cut-off events. [2021-10-15 20:15:39,234 INFO L130 PetriNetUnfolder]: For 17062/17062 co-relation queries the response was YES. [2021-10-15 20:15:39,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21406 conditions, 8337 events. 682/8337 cut-off events. For 17062/17062 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 55410 event pairs, 0 based on Foata normal form. 43/8380 useless extension candidates. Maximal degree in co-relation 20643. Up to 5113 conditions per place. [2021-10-15 20:15:39,253 INFO L132 encePairwiseOnDemand]: 367/422 looper letters, 0 selfloop transitions, 0 changer transitions 1012/1012 dead transitions. [2021-10-15 20:15:39,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1012 transitions, 13412 flow [2021-10-15 20:15:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:15:39,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:15:39,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:15:39,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:15:39,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:39,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:15:39,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:39,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:39,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:39,262 INFO L186 Difference]: Start difference. First operand has 211 places, 717 transitions, 9026 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:15:39,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1012 transitions, 13412 flow [2021-10-15 20:15:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1012 transitions, 12802 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:39,315 INFO L242 Difference]: Finished difference. Result has 209 places, 0 transitions, 0 flow [2021-10-15 20:15:39,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=8364, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=209, PETRI_TRANSITIONS=0} [2021-10-15 20:15:39,316 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -33 predicate places. [2021-10-15 20:15:39,316 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 0 transitions, 0 flow [2021-10-15 20:15:39,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:39,319 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:15:39,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:15:39,544 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:15:39,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:15:39 BoogieIcfgContainer [2021-10-15 20:15:39,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:15:39,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:15:39,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:15:39,553 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:15:39,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:59" (3/4) ... [2021-10-15 20:15:39,557 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:15:39,590 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:15:39,592 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:15:39,594 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:39,595 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:39,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:15:39,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:15:39,764 INFO L168 Benchmark]: Toolchain (without parser) took 43087.05 ms. Allocated memory was 88.1 MB in the beginning and 1.4 GB in the end (delta: 1.4 GB). Free memory was 49.0 MB in the beginning and 883.4 MB in the end (delta: -834.3 MB). Peak memory consumption was 517.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,765 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 67.5 MB in the beginning and 67.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:39,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 940.49 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 48.9 MB in the beginning and 78.4 MB in the end (delta: -29.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.45 ms. Allocated memory is still 127.9 MB. Free memory was 78.4 MB in the beginning and 68.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,766 INFO L168 Benchmark]: Boogie Preprocessor took 145.11 ms. Allocated memory is still 127.9 MB. Free memory was 68.9 MB in the beginning and 63.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,767 INFO L168 Benchmark]: RCFGBuilder took 1692.43 ms. Allocated memory is still 127.9 MB. Free memory was 63.0 MB in the beginning and 90.3 MB in the end (delta: -27.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,768 INFO L168 Benchmark]: TraceAbstraction took 39941.76 ms. Allocated memory was 127.9 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 89.6 MB in the beginning and 902.6 MB in the end (delta: -813.0 MB). Peak memory consumption was 499.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,768 INFO L168 Benchmark]: Witness Printer took 209.77 ms. Allocated memory is still 1.4 GB. Free memory was 902.6 MB in the beginning and 883.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:39,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 67.5 MB in the beginning and 67.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 940.49 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 48.9 MB in the beginning and 78.4 MB in the end (delta: -29.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 145.45 ms. Allocated memory is still 127.9 MB. Free memory was 78.4 MB in the beginning and 68.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 145.11 ms. Allocated memory is still 127.9 MB. Free memory was 68.9 MB in the beginning and 63.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1692.43 ms. Allocated memory is still 127.9 MB. Free memory was 63.0 MB in the beginning and 90.3 MB in the end (delta: -27.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39941.76 ms. Allocated memory was 127.9 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 89.6 MB in the beginning and 902.6 MB in the end (delta: -813.0 MB). Peak memory consumption was 499.6 MB. Max. memory is 16.1 GB. * Witness Printer took 209.77 ms. Allocated memory is still 1.4 GB. Free memory was 902.6 MB in the beginning and 883.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 152]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 16.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 39848.4ms, OverallIterations: 13, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 28924.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 139.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1033 SDtfs, 1838 SDslu, 0 SDs, 0 SdLazy, 6854 SolverSat, 977 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6435.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2046 GetRequests, 2017 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 142.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9026occurred in iteration=12, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 326.1ms SsaConstructionTime, 1006.2ms SatisfiabilityAnalysisTime, 7209.5ms InterpolantComputationTime, 6541 NumberOfCodeBlocks, 6541 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 6524 ConstructedInterpolants, 0 QuantifiedInterpolants, 21793 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2650 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 17 InterpolantComputations, 13 PerfectInterpolantSequences, 10079/10608 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:15:39,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b36e2636-ad33-4363-a84a-8deef873bc37/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...