./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:07:12,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:07:12,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:07:12,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:07:12,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:07:12,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:07:12,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:07:12,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:07:12,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:07:12,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:07:12,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:07:12,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:07:12,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:07:12,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:07:12,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:07:12,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:07:12,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:07:12,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:07:12,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:07:12,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:07:12,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:07:12,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:07:12,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:07:12,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:07:12,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:07:12,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:07:12,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:07:12,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:07:12,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:07:12,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:07:12,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:07:12,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:07:12,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:07:12,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:07:12,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:07:12,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:07:12,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:07:12,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:07:12,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:07:12,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:07:12,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:07:12,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:07:12,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:07:12,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:07:12,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:07:12,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:07:12,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:07:12,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:07:12,470 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:07:12,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:07:12,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:07:12,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:07:12,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:07:12,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:07:12,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:07:12,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:07:12,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:07:12,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:07:12,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:07:12,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:07:12,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:07:12,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:07:12,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:07:12,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:07:12,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:07:12,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:07:12,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:07:12,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:07:12,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:07:12,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:07:12,476 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:07:12,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:07:12,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:07:12,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:07:12,477 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_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 [2021-11-02 22:07:12,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:07:12,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:07:12,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:07:12,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:07:12,785 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:07:12,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2021-11-02 22:07:12,881 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/data/46a3e4a75/3059a2b706494fab95ca708fc600dc40/FLAG22262f1cb [2021-11-02 22:07:13,380 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:07:13,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2021-11-02 22:07:13,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/data/46a3e4a75/3059a2b706494fab95ca708fc600dc40/FLAG22262f1cb [2021-11-02 22:07:13,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/data/46a3e4a75/3059a2b706494fab95ca708fc600dc40 [2021-11-02 22:07:13,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:07:13,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:07:13,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:07:13,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:07:13,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:07:13,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:07:13" (1/1) ... [2021-11-02 22:07:13,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7837897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:13, skipping insertion in model container [2021-11-02 22:07:13,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:07:13" (1/1) ... [2021-11-02 22:07:13,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:07:13,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:07:13,981 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_6593c216-71a8-4cc8-8ccd-35c34784569c/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2021-11-02 22:07:13,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:07:14,006 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:07:14,081 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_6593c216-71a8-4cc8-8ccd-35c34784569c/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2021-11-02 22:07:14,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:07:14,109 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:07:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14 WrapperNode [2021-11-02 22:07:14,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:07:14,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:07:14,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:07:14,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:07:14,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:07:14,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:07:14,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:07:14,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:07:14,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:07:14,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:07:14,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:07:14,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:07:14,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (1/1) ... [2021-11-02 22:07:14,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:07:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:14,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:07:14,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:07:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-02 22:07:14,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-02 22:07:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-02 22:07:14,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-02 22:07:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-02 22:07:14,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-02 22:07:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-02 22:07:14,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-02 22:07:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:07:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-11-02 22:07:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-11-02 22:07:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-11-02 22:07:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-11-02 22:07:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:07:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:07:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:07:14,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:07:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:07:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:07:14,289 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-02 22:07:14,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:07:14,695 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-02 22:07:14,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:07:14 BoogieIcfgContainer [2021-11-02 22:07:14,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:07:14,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:07:14,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:07:14,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:07:14,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:07:13" (1/3) ... [2021-11-02 22:07:14,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:07:14, skipping insertion in model container [2021-11-02 22:07:14,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:14" (2/3) ... [2021-11-02 22:07:14,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:07:14, skipping insertion in model container [2021-11-02 22:07:14,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:07:14" (3/3) ... [2021-11-02 22:07:14,706 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2021-11-02 22:07:14,727 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 22:07:14,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:07:14,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:07:14,728 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 22:07:14,779 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,779 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,780 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,780 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,781 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,781 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,781 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,784 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,785 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,785 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,785 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,786 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,787 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,787 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,787 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,788 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,788 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,789 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,789 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,792 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,793 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,798 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,798 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,802 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,802 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,805 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,805 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,809 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,810 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,812 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,812 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:07:14,835 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-11-02 22:07:14,903 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:07:14,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:07:14,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-02 22:07:14,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 161 transitions, 370 flow [2021-11-02 22:07:15,035 INFO L129 PetriNetUnfolder]: 14/155 cut-off events. [2021-11-02 22:07:15,035 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-02 22:07:15,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 155 events. 14/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2021-11-02 22:07:15,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 161 transitions, 370 flow [2021-11-02 22:07:15,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 139 transitions, 314 flow [2021-11-02 22:07:15,125 INFO L129 PetriNetUnfolder]: 14/138 cut-off events. [2021-11-02 22:07:15,125 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-02 22:07:15,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:15,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:15,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:15,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1566629284, now seen corresponding path program 1 times [2021-11-02 22:07:15,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:15,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867975116] [2021-11-02 22:07:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:15,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:15,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:15,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867975116] [2021-11-02 22:07:15,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867975116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:15,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:15,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:07:15,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633789786] [2021-11-02 22:07:15,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:07:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:07:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:07:15,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 161 [2021-11-02 22:07:15,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 314 flow. Second operand has 2 states, 2 states have (on average 153.5) internal successors, (307), 2 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:15,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:15,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 161 [2021-11-02 22:07:15,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:15,722 INFO L129 PetriNetUnfolder]: 6/131 cut-off events. [2021-11-02 22:07:15,723 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-02 22:07:15,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 131 events. 6/131 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 8/131 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2021-11-02 22:07:15,726 INFO L132 encePairwiseOnDemand]: 153/161 looper letters, 0 selfloop transitions, 0 changer transitions 2/131 dead transitions. [2021-11-02 22:07:15,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 131 transitions, 298 flow [2021-11-02 22:07:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:07:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-02 22:07:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 312 transitions. [2021-11-02 22:07:15,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.968944099378882 [2021-11-02 22:07:15,762 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 312 transitions. [2021-11-02 22:07:15,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 312 transitions. [2021-11-02 22:07:15,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:15,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 312 transitions. [2021-11-02 22:07:15,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:15,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:15,791 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:15,794 INFO L186 Difference]: Start difference. First operand has 144 places, 139 transitions, 314 flow. Second operand 2 states and 312 transitions. [2021-11-02 22:07:15,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 131 transitions, 298 flow [2021-11-02 22:07:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 131 transitions, 274 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-11-02 22:07:15,819 INFO L242 Difference]: Finished difference. Result has 133 places, 129 transitions, 270 flow [2021-11-02 22:07:15,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=270, PETRI_PLACES=133, PETRI_TRANSITIONS=129} [2021-11-02 22:07:15,823 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -11 predicate places. [2021-11-02 22:07:15,823 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 129 transitions, 270 flow [2021-11-02 22:07:15,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 153.5) internal successors, (307), 2 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:15,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:15,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:15,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:07:15,826 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1816216015, now seen corresponding path program 1 times [2021-11-02 22:07:15,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:15,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285354624] [2021-11-02 22:07:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:15,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:16,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:16,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285354624] [2021-11-02 22:07:16,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285354624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:16,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:16,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:07:16,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888395240] [2021-11-02 22:07:16,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:07:16,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:07:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:07:16,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 161 [2021-11-02 22:07:16,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 129 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:16,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:16,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 161 [2021-11-02 22:07:16,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:16,646 INFO L129 PetriNetUnfolder]: 29/212 cut-off events. [2021-11-02 22:07:16,646 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:07:16,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 212 events. 29/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 377 event pairs, 8 based on Foata normal form. 1/184 useless extension candidates. Maximal degree in co-relation 278. Up to 42 conditions per place. [2021-11-02 22:07:16,654 INFO L132 encePairwiseOnDemand]: 153/161 looper letters, 19 selfloop transitions, 5 changer transitions 3/138 dead transitions. [2021-11-02 22:07:16,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 138 transitions, 342 flow [2021-11-02 22:07:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2021-11-02 22:07:16,660 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84472049689441 [2021-11-02 22:07:16,660 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2021-11-02 22:07:16,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2021-11-02 22:07:16,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:16,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2021-11-02 22:07:16,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:16,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:16,675 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:16,675 INFO L186 Difference]: Start difference. First operand has 133 places, 129 transitions, 270 flow. Second operand 7 states and 952 transitions. [2021-11-02 22:07:16,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 138 transitions, 342 flow [2021-11-02 22:07:16,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 138 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-02 22:07:16,688 INFO L242 Difference]: Finished difference. Result has 140 places, 131 transitions, 297 flow [2021-11-02 22:07:16,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2021-11-02 22:07:16,689 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -4 predicate places. [2021-11-02 22:07:16,689 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 297 flow [2021-11-02 22:07:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:16,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:16,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:07:16,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2141344893, now seen corresponding path program 1 times [2021-11-02 22:07:16,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:16,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071630659] [2021-11-02 22:07:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:16,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:17,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:17,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071630659] [2021-11-02 22:07:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071630659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:17,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:17,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:17,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68983834] [2021-11-02 22:07:17,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:17,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:17,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:17,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:17,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:17,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:17,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:20,092 INFO L129 PetriNetUnfolder]: 8881/14075 cut-off events. [2021-11-02 22:07:20,092 INFO L130 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2021-11-02 22:07:20,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26141 conditions, 14075 events. 8881/14075 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 99397 event pairs, 3138 based on Foata normal form. 0/8571 useless extension candidates. Maximal degree in co-relation 26134. Up to 3206 conditions per place. [2021-11-02 22:07:20,493 INFO L132 encePairwiseOnDemand]: 150/161 looper letters, 57 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2021-11-02 22:07:20,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 171 transitions, 527 flow [2021-11-02 22:07:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 925 transitions. [2021-11-02 22:07:20,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8207630878438332 [2021-11-02 22:07:20,498 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 925 transitions. [2021-11-02 22:07:20,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 925 transitions. [2021-11-02 22:07:20,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:20,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 925 transitions. [2021-11-02 22:07:20,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:20,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:20,510 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:20,510 INFO L186 Difference]: Start difference. First operand has 140 places, 131 transitions, 297 flow. Second operand 7 states and 925 transitions. [2021-11-02 22:07:20,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 171 transitions, 527 flow [2021-11-02 22:07:20,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 171 transitions, 512 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-02 22:07:20,540 INFO L242 Difference]: Finished difference. Result has 143 places, 136 transitions, 358 flow [2021-11-02 22:07:20,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2021-11-02 22:07:20,541 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -1 predicate places. [2021-11-02 22:07:20,541 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 358 flow [2021-11-02 22:07:20,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:20,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:20,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:20,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:07:20,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1552721733, now seen corresponding path program 2 times [2021-11-02 22:07:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:20,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050038706] [2021-11-02 22:07:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:20,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:20,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:20,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050038706] [2021-11-02 22:07:20,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050038706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:20,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550206222] [2021-11-02 22:07:20,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:20,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:20,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:20,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:20,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:20,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:20,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:22,947 INFO L129 PetriNetUnfolder]: 7296/11680 cut-off events. [2021-11-02 22:07:22,948 INFO L130 PetriNetUnfolder]: For 6874/6910 co-relation queries the response was YES. [2021-11-02 22:07:23,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26749 conditions, 11680 events. 7296/11680 cut-off events. For 6874/6910 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 81286 event pairs, 1840 based on Foata normal form. 86/8106 useless extension candidates. Maximal degree in co-relation 26741. Up to 3353 conditions per place. [2021-11-02 22:07:23,201 INFO L132 encePairwiseOnDemand]: 149/161 looper letters, 54 selfloop transitions, 17 changer transitions 1/173 dead transitions. [2021-11-02 22:07:23,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 628 flow [2021-11-02 22:07:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2021-11-02 22:07:23,206 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8163265306122449 [2021-11-02 22:07:23,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2021-11-02 22:07:23,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2021-11-02 22:07:23,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:23,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2021-11-02 22:07:23,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:23,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:23,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:23,217 INFO L186 Difference]: Start difference. First operand has 143 places, 136 transitions, 358 flow. Second operand 7 states and 920 transitions. [2021-11-02 22:07:23,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 628 flow [2021-11-02 22:07:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 173 transitions, 624 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:23,234 INFO L242 Difference]: Finished difference. Result has 150 places, 143 transitions, 469 flow [2021-11-02 22:07:23,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=150, PETRI_TRANSITIONS=143} [2021-11-02 22:07:23,235 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 6 predicate places. [2021-11-02 22:07:23,236 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 143 transitions, 469 flow [2021-11-02 22:07:23,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:23,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:23,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:23,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:07:23,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1555906065, now seen corresponding path program 1 times [2021-11-02 22:07:23,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:23,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792923495] [2021-11-02 22:07:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:23,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:23,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:23,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792923495] [2021-11-02 22:07:23,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792923495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:23,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:23,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320137015] [2021-11-02 22:07:23,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:23,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:23,444 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:23,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:23,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:23,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:23,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:25,477 INFO L129 PetriNetUnfolder]: 7848/12168 cut-off events. [2021-11-02 22:07:25,477 INFO L130 PetriNetUnfolder]: For 15097/15164 co-relation queries the response was YES. [2021-11-02 22:07:25,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31043 conditions, 12168 events. 7848/12168 cut-off events. For 15097/15164 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 81593 event pairs, 1678 based on Foata normal form. 89/8064 useless extension candidates. Maximal degree in co-relation 31031. Up to 5003 conditions per place. [2021-11-02 22:07:25,685 INFO L132 encePairwiseOnDemand]: 148/161 looper letters, 58 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2021-11-02 22:07:25,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 174 transitions, 702 flow [2021-11-02 22:07:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 919 transitions. [2021-11-02 22:07:25,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8154392191659272 [2021-11-02 22:07:25,689 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 919 transitions. [2021-11-02 22:07:25,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 919 transitions. [2021-11-02 22:07:25,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:25,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 919 transitions. [2021-11-02 22:07:25,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:25,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:25,697 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:25,697 INFO L186 Difference]: Start difference. First operand has 150 places, 143 transitions, 469 flow. Second operand 7 states and 919 transitions. [2021-11-02 22:07:25,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 174 transitions, 702 flow [2021-11-02 22:07:25,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 174 transitions, 692 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:25,732 INFO L242 Difference]: Finished difference. Result has 157 places, 146 transitions, 532 flow [2021-11-02 22:07:25,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=157, PETRI_TRANSITIONS=146} [2021-11-02 22:07:25,733 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 13 predicate places. [2021-11-02 22:07:25,733 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 146 transitions, 532 flow [2021-11-02 22:07:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:25,734 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:25,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:25,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:07:25,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash 416392297, now seen corresponding path program 2 times [2021-11-02 22:07:25,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:25,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2275098] [2021-11-02 22:07:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:25,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:25,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:25,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2275098] [2021-11-02 22:07:25,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2275098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:25,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:25,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:25,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452749458] [2021-11-02 22:07:25,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:25,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:25,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:25,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 146 transitions, 532 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:25,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:25,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:25,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:28,123 INFO L129 PetriNetUnfolder]: 9640/13702 cut-off events. [2021-11-02 22:07:28,124 INFO L130 PetriNetUnfolder]: For 28053/28117 co-relation queries the response was YES. [2021-11-02 22:07:28,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37257 conditions, 13702 events. 9640/13702 cut-off events. For 28053/28117 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 83569 event pairs, 4000 based on Foata normal form. 341/9429 useless extension candidates. Maximal degree in co-relation 37242. Up to 4752 conditions per place. [2021-11-02 22:07:28,531 INFO L132 encePairwiseOnDemand]: 150/161 looper letters, 62 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2021-11-02 22:07:28,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 179 transitions, 800 flow [2021-11-02 22:07:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2021-11-02 22:07:28,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8163265306122449 [2021-11-02 22:07:28,536 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2021-11-02 22:07:28,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2021-11-02 22:07:28,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:28,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2021-11-02 22:07:28,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:28,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:28,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:28,545 INFO L186 Difference]: Start difference. First operand has 157 places, 146 transitions, 532 flow. Second operand 7 states and 920 transitions. [2021-11-02 22:07:28,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 179 transitions, 800 flow [2021-11-02 22:07:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 179 transitions, 796 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:28,595 INFO L242 Difference]: Finished difference. Result has 164 places, 150 transitions, 621 flow [2021-11-02 22:07:28,595 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=164, PETRI_TRANSITIONS=150} [2021-11-02 22:07:28,596 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 20 predicate places. [2021-11-02 22:07:28,596 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 150 transitions, 621 flow [2021-11-02 22:07:28,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:28,596 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:28,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:28,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:07:28,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash -45622709, now seen corresponding path program 1 times [2021-11-02 22:07:28,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:28,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296089683] [2021-11-02 22:07:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:28,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:28,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:28,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296089683] [2021-11-02 22:07:28,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296089683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:28,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:28,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:07:28,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685709203] [2021-11-02 22:07:28,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:07:28,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:07:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:07:28,943 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 161 [2021-11-02 22:07:28,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 150 transitions, 621 flow. Second operand has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:28,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:28,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 161 [2021-11-02 22:07:28,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:29,110 INFO L129 PetriNetUnfolder]: 46/287 cut-off events. [2021-11-02 22:07:29,110 INFO L130 PetriNetUnfolder]: For 293/317 co-relation queries the response was YES. [2021-11-02 22:07:29,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 287 events. 46/287 cut-off events. For 293/317 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 736 event pairs, 7 based on Foata normal form. 6/262 useless extension candidates. Maximal degree in co-relation 583. Up to 42 conditions per place. [2021-11-02 22:07:29,120 INFO L132 encePairwiseOnDemand]: 153/161 looper letters, 19 selfloop transitions, 5 changer transitions 3/159 dead transitions. [2021-11-02 22:07:29,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 159 transitions, 695 flow [2021-11-02 22:07:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2021-11-02 22:07:29,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84472049689441 [2021-11-02 22:07:29,125 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2021-11-02 22:07:29,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2021-11-02 22:07:29,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:29,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2021-11-02 22:07:29,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:29,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:29,133 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:29,134 INFO L186 Difference]: Start difference. First operand has 164 places, 150 transitions, 621 flow. Second operand 7 states and 952 transitions. [2021-11-02 22:07:29,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 159 transitions, 695 flow [2021-11-02 22:07:29,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 159 transitions, 687 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:29,142 INFO L242 Difference]: Finished difference. Result has 171 places, 152 transitions, 640 flow [2021-11-02 22:07:29,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=640, PETRI_PLACES=171, PETRI_TRANSITIONS=152} [2021-11-02 22:07:29,143 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 27 predicate places. [2021-11-02 22:07:29,143 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 152 transitions, 640 flow [2021-11-02 22:07:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:29,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:29,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:29,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:07:29,145 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash -886696079, now seen corresponding path program 1 times [2021-11-02 22:07:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:29,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799200040] [2021-11-02 22:07:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:29,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:29,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:29,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799200040] [2021-11-02 22:07:29,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799200040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:29,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:29,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:29,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729739993] [2021-11-02 22:07:29,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:29,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:29,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:29,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 152 transitions, 640 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:29,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:29,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:29,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:33,136 INFO L129 PetriNetUnfolder]: 18099/27295 cut-off events. [2021-11-02 22:07:33,137 INFO L130 PetriNetUnfolder]: For 101804/112849 co-relation queries the response was YES. [2021-11-02 22:07:33,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82961 conditions, 27295 events. 18099/27295 cut-off events. For 101804/112849 co-relation queries the response was YES. Maximal size of possible extension queue 3308. Compared 214709 event pairs, 1852 based on Foata normal form. 4128/23455 useless extension candidates. Maximal degree in co-relation 82939. Up to 6792 conditions per place. [2021-11-02 22:07:33,694 INFO L132 encePairwiseOnDemand]: 150/161 looper letters, 109 selfloop transitions, 13 changer transitions 0/231 dead transitions. [2021-11-02 22:07:33,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 231 transitions, 1480 flow [2021-11-02 22:07:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 925 transitions. [2021-11-02 22:07:33,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8207630878438332 [2021-11-02 22:07:33,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 925 transitions. [2021-11-02 22:07:33,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 925 transitions. [2021-11-02 22:07:33,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:33,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 925 transitions. [2021-11-02 22:07:33,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:33,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:33,708 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:33,708 INFO L186 Difference]: Start difference. First operand has 171 places, 152 transitions, 640 flow. Second operand 7 states and 925 transitions. [2021-11-02 22:07:33,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 231 transitions, 1480 flow [2021-11-02 22:07:33,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 231 transitions, 1465 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-02 22:07:33,787 INFO L242 Difference]: Finished difference. Result has 174 places, 157 transitions, 701 flow [2021-11-02 22:07:33,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=701, PETRI_PLACES=174, PETRI_TRANSITIONS=157} [2021-11-02 22:07:33,788 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 30 predicate places. [2021-11-02 22:07:33,788 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 157 transitions, 701 flow [2021-11-02 22:07:33,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:33,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:33,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:07:33,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:33,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash -925445969, now seen corresponding path program 2 times [2021-11-02 22:07:33,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:33,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616460566] [2021-11-02 22:07:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:33,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:33,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:33,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616460566] [2021-11-02 22:07:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616460566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:33,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:33,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747430263] [2021-11-02 22:07:33,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:33,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:33,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:33,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 157 transitions, 701 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:33,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:33,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:33,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:37,913 INFO L129 PetriNetUnfolder]: 17561/27016 cut-off events. [2021-11-02 22:07:37,914 INFO L130 PetriNetUnfolder]: For 104543/122768 co-relation queries the response was YES. [2021-11-02 22:07:38,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89593 conditions, 27016 events. 17561/27016 cut-off events. For 104543/122768 co-relation queries the response was YES. Maximal size of possible extension queue 2964. Compared 210911 event pairs, 2349 based on Foata normal form. 3832/25297 useless extension candidates. Maximal degree in co-relation 89570. Up to 8718 conditions per place. [2021-11-02 22:07:38,523 INFO L132 encePairwiseOnDemand]: 148/161 looper letters, 106 selfloop transitions, 18 changer transitions 0/233 dead transitions. [2021-11-02 22:07:38,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 233 transitions, 1579 flow [2021-11-02 22:07:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2021-11-02 22:07:38,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8163265306122449 [2021-11-02 22:07:38,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2021-11-02 22:07:38,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2021-11-02 22:07:38,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:38,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2021-11-02 22:07:38,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:38,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:38,537 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:38,537 INFO L186 Difference]: Start difference. First operand has 174 places, 157 transitions, 701 flow. Second operand 7 states and 920 transitions. [2021-11-02 22:07:38,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 233 transitions, 1579 flow [2021-11-02 22:07:38,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 233 transitions, 1575 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:38,670 INFO L242 Difference]: Finished difference. Result has 181 places, 165 transitions, 820 flow [2021-11-02 22:07:38,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=820, PETRI_PLACES=181, PETRI_TRANSITIONS=165} [2021-11-02 22:07:38,671 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 37 predicate places. [2021-11-02 22:07:38,671 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 165 transitions, 820 flow [2021-11-02 22:07:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:38,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:38,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:38,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:07:38,673 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash 538227273, now seen corresponding path program 1 times [2021-11-02 22:07:38,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:38,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058405130] [2021-11-02 22:07:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:38,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:38,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:38,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058405130] [2021-11-02 22:07:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058405130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:38,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739319013] [2021-11-02 22:07:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:38,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:38,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:38,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:38,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:07:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:07:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739319013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:39,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:39,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-02 22:07:39,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266159987] [2021-11-02 22:07:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:07:39,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:07:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:07:39,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:39,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 165 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 125.77777777777777) internal successors, (1132), 9 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:39,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:39,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:39,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:45,243 INFO L129 PetriNetUnfolder]: 24946/35943 cut-off events. [2021-11-02 22:07:45,244 INFO L130 PetriNetUnfolder]: For 160250/184389 co-relation queries the response was YES. [2021-11-02 22:07:45,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129958 conditions, 35943 events. 24946/35943 cut-off events. For 160250/184389 co-relation queries the response was YES. Maximal size of possible extension queue 3777. Compared 262847 event pairs, 2144 based on Foata normal form. 6141/34130 useless extension candidates. Maximal degree in co-relation 129931. Up to 11537 conditions per place. [2021-11-02 22:07:45,960 INFO L132 encePairwiseOnDemand]: 147/161 looper letters, 135 selfloop transitions, 17 changer transitions 4/265 dead transitions. [2021-11-02 22:07:45,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 265 transitions, 1968 flow [2021-11-02 22:07:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:07:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-02 22:07:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1423 transitions. [2021-11-02 22:07:45,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8035008469791078 [2021-11-02 22:07:45,967 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1423 transitions. [2021-11-02 22:07:45,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1423 transitions. [2021-11-02 22:07:45,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:45,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1423 transitions. [2021-11-02 22:07:45,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 129.36363636363637) internal successors, (1423), 11 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:45,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 161.0) internal successors, (1932), 12 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:45,979 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 161.0) internal successors, (1932), 12 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:45,980 INFO L186 Difference]: Start difference. First operand has 181 places, 165 transitions, 820 flow. Second operand 11 states and 1423 transitions. [2021-11-02 22:07:45,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 265 transitions, 1968 flow [2021-11-02 22:07:46,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 265 transitions, 1958 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:46,647 INFO L242 Difference]: Finished difference. Result has 195 places, 171 transitions, 913 flow [2021-11-02 22:07:46,648 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=913, PETRI_PLACES=195, PETRI_TRANSITIONS=171} [2021-11-02 22:07:46,648 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 51 predicate places. [2021-11-02 22:07:46,649 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 171 transitions, 913 flow [2021-11-02 22:07:46,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 125.77777777777777) internal successors, (1132), 9 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:46,649 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:46,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:46,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:46,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6593c216-71a8-4cc8-8ccd-35c34784569c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:07:46,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -19320353, now seen corresponding path program 2 times [2021-11-02 22:07:46,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:46,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979303940] [2021-11-02 22:07:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:46,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:47,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:47,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979303940] [2021-11-02 22:07:47,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979303940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:47,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:47,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:47,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69131165] [2021-11-02 22:07:47,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:47,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:47,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:47,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 171 transitions, 913 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:47,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:47,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:47,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:51,766 INFO L129 PetriNetUnfolder]: 18059/27944 cut-off events. [2021-11-02 22:07:51,766 INFO L130 PetriNetUnfolder]: For 143357/165671 co-relation queries the response was YES. [2021-11-02 22:07:52,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113493 conditions, 27944 events. 18059/27944 cut-off events. For 143357/165671 co-relation queries the response was YES. Maximal size of possible extension queue 3359. Compared 230178 event pairs, 1625 based on Foata normal form. 4378/27154 useless extension candidates. Maximal degree in co-relation 113460. Up to 12487 conditions per place. [2021-11-02 22:07:52,626 INFO L132 encePairwiseOnDemand]: 149/161 looper letters, 113 selfloop transitions, 16 changer transitions 0/238 dead transitions. [2021-11-02 22:07:52,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 238 transitions, 1750 flow [2021-11-02 22:07:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 919 transitions. [2021-11-02 22:07:52,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8154392191659272 [2021-11-02 22:07:52,632 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 919 transitions. [2021-11-02 22:07:52,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 919 transitions. [2021-11-02 22:07:52,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:52,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 919 transitions. [2021-11-02 22:07:52,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,640 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,640 INFO L186 Difference]: Start difference. First operand has 195 places, 171 transitions, 913 flow. Second operand 7 states and 919 transitions. [2021-11-02 22:07:52,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 238 transitions, 1750 flow [2021-11-02 22:07:53,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 238 transitions, 1722 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-11-02 22:07:53,879 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 952 flow [2021-11-02 22:07:53,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=952, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2021-11-02 22:07:53,880 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 51 predicate places. [2021-11-02 22:07:53,880 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 952 flow [2021-11-02 22:07:53,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:53,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:53,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:07:53,881 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:53,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:53,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1938116903, now seen corresponding path program 1 times [2021-11-02 22:07:53,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:53,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973071946] [2021-11-02 22:07:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:53,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:07:54,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:54,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973071946] [2021-11-02 22:07:54,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973071946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:54,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:54,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:07:54,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727827853] [2021-11-02 22:07:54,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:07:54,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:07:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:07:54,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 161 [2021-11-02 22:07:54,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 172 transitions, 952 flow. Second operand has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:54,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 161 [2021-11-02 22:07:54,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:07:54,374 INFO L129 PetriNetUnfolder]: 62/374 cut-off events. [2021-11-02 22:07:54,374 INFO L130 PetriNetUnfolder]: For 568/611 co-relation queries the response was YES. [2021-11-02 22:07:54,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 374 events. 62/374 cut-off events. For 568/611 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1221 event pairs, 5 based on Foata normal form. 11/346 useless extension candidates. Maximal degree in co-relation 876. Up to 42 conditions per place. [2021-11-02 22:07:54,396 INFO L132 encePairwiseOnDemand]: 153/161 looper letters, 19 selfloop transitions, 5 changer transitions 3/181 dead transitions. [2021-11-02 22:07:54,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 181 transitions, 1028 flow [2021-11-02 22:07:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:07:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2021-11-02 22:07:54,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84472049689441 [2021-11-02 22:07:54,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2021-11-02 22:07:54,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2021-11-02 22:07:54,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:07:54,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2021-11-02 22:07:54,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,409 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,409 INFO L186 Difference]: Start difference. First operand has 195 places, 172 transitions, 952 flow. Second operand 7 states and 952 transitions. [2021-11-02 22:07:54,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 181 transitions, 1028 flow [2021-11-02 22:07:54,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 181 transitions, 1020 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-02 22:07:54,421 INFO L242 Difference]: Finished difference. Result has 202 places, 174 transitions, 971 flow [2021-11-02 22:07:54,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=971, PETRI_PLACES=202, PETRI_TRANSITIONS=174} [2021-11-02 22:07:54,422 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 58 predicate places. [2021-11-02 22:07:54,422 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 174 transitions, 971 flow [2021-11-02 22:07:54,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:07:54,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:54,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:07:54,424 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:07:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1545356105, now seen corresponding path program 1 times [2021-11-02 22:07:54,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:54,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222460162] [2021-11-02 22:07:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:54,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:07:54,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:54,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222460162] [2021-11-02 22:07:54,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222460162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:54,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:54,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:54,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484713604] [2021-11-02 22:07:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:54,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:54,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 161 [2021-11-02 22:07:54,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 174 transitions, 971 flow. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:54,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:07:54,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 161 [2021-11-02 22:07:54,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:08:09,211 INFO L129 PetriNetUnfolder]: 54013/76981 cut-off events. [2021-11-02 22:08:09,212 INFO L130 PetriNetUnfolder]: For 579619/644335 co-relation queries the response was YES. [2021-11-02 22:08:10,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 324001 conditions, 76981 events. 54013/76981 cut-off events. For 579619/644335 co-relation queries the response was YES. Maximal size of possible extension queue 6149. Compared 594372 event pairs, 4789 based on Foata normal form. 22381/88285 useless extension candidates. Maximal degree in co-relation 323963. Up to 22738 conditions per place. [2021-11-02 22:08:11,416 INFO L132 encePairwiseOnDemand]: 150/161 looper letters, 165 selfloop transitions, 13 changer transitions 0/295 dead transitions. [2021-11-02 22:08:11,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 295 transitions, 2435 flow [2021-11-02 22:08:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:08:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:08:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 925 transitions. [2021-11-02 22:08:11,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8207630878438332 [2021-11-02 22:08:11,421 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 925 transitions. [2021-11-02 22:08:11,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 925 transitions. [2021-11-02 22:08:11,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:08:11,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 925 transitions. [2021-11-02 22:08:11,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:11,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:11,430 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:11,430 INFO L186 Difference]: Start difference. First operand has 202 places, 174 transitions, 971 flow. Second operand 7 states and 925 transitions. [2021-11-02 22:08:11,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 295 transitions, 2435 flow [2021-11-02 22:08:13,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 295 transitions, 2420 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-02 22:08:13,571 INFO L242 Difference]: Finished difference. Result has 205 places, 179 transitions, 1032 flow [2021-11-02 22:08:13,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1032, PETRI_PLACES=205, PETRI_TRANSITIONS=179} [2021-11-02 22:08:13,572 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 61 predicate places. [2021-11-02 22:08:13,573 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 179 transitions, 1032 flow [2021-11-02 22:08:13,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:13,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:08:13,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:13,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:08:13,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-02 22:08:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1503260337, now seen corresponding path program 2 times [2021-11-02 22:08:13,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:13,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226328558] [2021-11-02 22:08:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:13,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms