./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF --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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:35:20,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:35:20,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:35:20,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:35:20,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:35:20,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:35:20,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:35:20,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:35:20,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:35:20,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:35:20,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:35:20,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:35:20,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:35:20,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:35:20,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:35:20,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:35:20,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:35:20,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:35:20,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:35:20,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:35:20,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:35:20,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:35:20,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:35:20,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:35:20,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:35:20,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:35:20,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:35:20,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:35:20,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:35:20,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:35:20,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:35:20,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:35:20,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:35:20,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:35:20,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:35:20,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:35:20,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:35:20,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:35:20,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:35:20,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:35:20,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:35:20,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:35:20,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:35:20,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:35:20,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:35:20,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:35:20,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:35:20,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:35:20,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:35:20,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:35:20,268 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:35:20,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:35:20,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:35:20,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:35:20,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:35:20,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:35:20,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:35:20,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:35:20,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:35:20,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:35:20,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:35:20,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:35:20,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:35:20,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:35:20,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:35:20,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:35:20,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:35:20,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:35:20,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:35:20,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:35:20,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:35:20,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:35:20,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:35:20,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:35:20,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:35:20,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:35:20,277 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_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2021-11-20 07:35:20,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:35:20,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:35:20,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:35:20,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:35:20,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:35:20,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2021-11-20 07:35:20,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/data/fff552a86/34271a1ea78d46b0997bb9fe5d60ae54/FLAG9cb160d0f [2021-11-20 07:35:21,569 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:35:21,569 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2021-11-20 07:35:21,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/data/fff552a86/34271a1ea78d46b0997bb9fe5d60ae54/FLAG9cb160d0f [2021-11-20 07:35:21,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/data/fff552a86/34271a1ea78d46b0997bb9fe5d60ae54 [2021-11-20 07:35:21,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:35:21,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:35:21,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:21,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:35:21,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:35:21,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:21" (1/1) ... [2021-11-20 07:35:21,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15687df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:21, skipping insertion in model container [2021-11-20 07:35:21,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:21" (1/1) ... [2021-11-20 07:35:21,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:35:21,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:35:22,237 WARN L230 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_661c1316-ef69-4f98-a79c-a9ea1863bbcf/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2021-11-20 07:35:22,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:22,259 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:35:22,290 WARN L230 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_661c1316-ef69-4f98-a79c-a9ea1863bbcf/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2021-11-20 07:35:22,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:22,314 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:35:22,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22 WrapperNode [2021-11-20 07:35:22,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:22,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:35:22,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:35:22,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:35:22,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,367 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2021-11-20 07:35:22,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:35:22,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:35:22,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:35:22,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:35:22,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:35:22,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:35:22,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:35:22,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:35:22,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (1/1) ... [2021-11-20 07:35:22,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:35:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:22,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:35:22,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:35:22,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:35:22,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 07:35:22,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 07:35:22,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 07:35:22,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 07:35:22,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-20 07:35:22,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-20 07:35:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:35:22,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:35:22,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:35:22,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:35:22,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:35:22,521 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 07:35:22,683 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:35:22,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:35:23,168 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:35:23,290 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:35:23,290 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:35:23,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:35:23 BoogieIcfgContainer [2021-11-20 07:35:23,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:35:23,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:35:23,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:35:23,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:35:23,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:35:21" (1/3) ... [2021-11-20 07:35:23,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0ed432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:35:23, skipping insertion in model container [2021-11-20 07:35:23,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:22" (2/3) ... [2021-11-20 07:35:23,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0ed432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:35:23, skipping insertion in model container [2021-11-20 07:35:23,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:35:23" (3/3) ... [2021-11-20 07:35:23,315 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2021-11-20 07:35:23,323 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 07:35:23,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:35:23,324 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:35:23,324 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 07:35:23,405 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,405 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,406 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,407 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,407 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,407 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,408 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,409 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,410 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,412 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,413 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,414 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,415 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,417 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,418 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,418 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,418 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,419 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,419 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,420 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,421 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,423 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,423 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,424 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,425 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,427 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,427 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,427 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,428 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,428 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,428 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,429 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,429 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,429 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,430 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,430 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,430 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,430 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,431 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,431 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,431 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,431 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,432 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,432 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,433 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,433 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,434 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,438 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,438 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,439 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,439 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,439 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,440 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,447 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,448 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,455 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,456 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,456 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,458 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,458 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,459 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,459 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,459 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,459 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,461 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,461 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,462 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,462 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,462 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,462 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:35:23,469 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-20 07:35:23,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:35:23,566 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 [2021-11-20 07:35:23,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-20 07:35:23,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2021-11-20 07:35:23,739 INFO L129 PetriNetUnfolder]: 12/150 cut-off events. [2021-11-20 07:35:23,739 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 07:35:23,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2021-11-20 07:35:23,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2021-11-20 07:35:23,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2021-11-20 07:35:23,864 INFO L129 PetriNetUnfolder]: 12/138 cut-off events. [2021-11-20 07:35:23,865 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 07:35:23,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:35:23,866 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] [2021-11-20 07:35:23,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:35:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -977644638, now seen corresponding path program 1 times [2021-11-20 07:35:23,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248010721] [2021-11-20 07:35:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:23,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:24,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:24,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248010721] [2021-11-20 07:35:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248010721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:24,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:24,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:35:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719461908] [2021-11-20 07:35:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:24,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:35:24,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:35:24,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:35:24,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 153 [2021-11-20 07:35:24,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:24,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:35:24,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 153 [2021-11-20 07:35:24,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:35:24,465 INFO L129 PetriNetUnfolder]: 41/264 cut-off events. [2021-11-20 07:35:24,466 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2021-11-20 07:35:24,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 264 events. 41/264 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 695 event pairs, 15 based on Foata normal form. 42/275 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2021-11-20 07:35:24,473 INFO L132 encePairwiseOnDemand]: 145/153 looper letters, 9 selfloop transitions, 0 changer transitions 4/131 dead transitions. [2021-11-20 07:35:24,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 131 transitions, 298 flow [2021-11-20 07:35:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:35:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 07:35:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 287 transitions. [2021-11-20 07:35:24,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9379084967320261 [2021-11-20 07:35:24,494 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 287 transitions. [2021-11-20 07:35:24,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 287 transitions. [2021-11-20 07:35:24,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:35:24,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 287 transitions. [2021-11-20 07:35:24,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:24,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:24,514 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:24,517 INFO L186 Difference]: Start difference. First operand has 137 places, 139 transitions, 296 flow. Second operand 2 states and 287 transitions. [2021-11-20 07:35:24,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 131 transitions, 298 flow [2021-11-20 07:35:24,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-20 07:35:24,529 INFO L242 Difference]: Finished difference. Result has 132 places, 127 transitions, 260 flow [2021-11-20 07:35:24,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=131, 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=260, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2021-11-20 07:35:24,537 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, -5 predicate places. [2021-11-20 07:35:24,538 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 260 flow [2021-11-20 07:35:24,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:24,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:35:24,539 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] [2021-11-20 07:35:24,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:35:24,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:35:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1446866490, now seen corresponding path program 1 times [2021-11-20 07:35:24,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:24,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807945132] [2021-11-20 07:35:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:24,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:25,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807945132] [2021-11-20 07:35:25,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807945132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:25,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:25,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:35:25,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361966485] [2021-11-20 07:35:25,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:25,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:35:25,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:35:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:35:25,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 153 [2021-11-20 07:35:25,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 106.16666666666667) internal successors, (637), 6 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:35:25,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 153 [2021-11-20 07:35:25,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:35:25,344 INFO L129 PetriNetUnfolder]: 395/783 cut-off events. [2021-11-20 07:35:25,345 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-11-20 07:35:25,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 783 events. 395/783 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3301 event pairs, 103 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 1385. Up to 305 conditions per place. [2021-11-20 07:35:25,359 INFO L132 encePairwiseOnDemand]: 146/153 looper letters, 42 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2021-11-20 07:35:25,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 136 transitions, 376 flow [2021-11-20 07:35:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:35:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 07:35:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 655 transitions. [2021-11-20 07:35:25,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7135076252723311 [2021-11-20 07:35:25,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 655 transitions. [2021-11-20 07:35:25,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 655 transitions. [2021-11-20 07:35:25,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:35:25,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 655 transitions. [2021-11-20 07:35:25,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.16666666666667) internal successors, (655), 6 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,379 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,379 INFO L186 Difference]: Start difference. First operand has 132 places, 127 transitions, 260 flow. Second operand 6 states and 655 transitions. [2021-11-20 07:35:25,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 136 transitions, 376 flow [2021-11-20 07:35:25,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 136 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 07:35:25,386 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 285 flow [2021-11-20 07:35:25,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-11-20 07:35:25,388 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, -2 predicate places. [2021-11-20 07:35:25,388 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 285 flow [2021-11-20 07:35:25,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.16666666666667) internal successors, (637), 6 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:35:25,390 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] [2021-11-20 07:35:25,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:35:25,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:35:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 419718841, now seen corresponding path program 1 times [2021-11-20 07:35:25,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:25,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898313934] [2021-11-20 07:35:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:25,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:25,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:25,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898313934] [2021-11-20 07:35:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898313934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:25,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:25,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:35:25,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876925827] [2021-11-20 07:35:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:25,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:35:25,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:35:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:35:25,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 153 [2021-11-20 07:35:25,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 285 flow. Second operand has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:25,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:35:25,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 153 [2021-11-20 07:35:25,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:35:26,391 INFO L129 PetriNetUnfolder]: 395/799 cut-off events. [2021-11-20 07:35:26,391 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2021-11-20 07:35:26,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1597 conditions, 799 events. 395/799 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3351 event pairs, 199 based on Foata normal form. 1/622 useless extension candidates. Maximal degree in co-relation 1591. Up to 508 conditions per place. [2021-11-20 07:35:26,404 INFO L132 encePairwiseOnDemand]: 142/153 looper letters, 54 selfloop transitions, 7 changer transitions 4/144 dead transitions. [2021-11-20 07:35:26,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 144 transitions, 453 flow [2021-11-20 07:35:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:35:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 07:35:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 893 transitions. [2021-11-20 07:35:26,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6485112563543937 [2021-11-20 07:35:26,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 893 transitions. [2021-11-20 07:35:26,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 893 transitions. [2021-11-20 07:35:26,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:35:26,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 893 transitions. [2021-11-20 07:35:26,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:26,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:26,425 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:26,425 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 285 flow. Second operand 9 states and 893 transitions. [2021-11-20 07:35:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 144 transitions, 453 flow [2021-11-20 07:35:26,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 144 transitions, 441 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 07:35:26,440 INFO L242 Difference]: Finished difference. Result has 143 places, 129 transitions, 307 flow [2021-11-20 07:35:26,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=143, PETRI_TRANSITIONS=129} [2021-11-20 07:35:26,444 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 6 predicate places. [2021-11-20 07:35:26,444 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 129 transitions, 307 flow [2021-11-20 07:35:26,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:26,445 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:35:26,446 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] [2021-11-20 07:35:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:35:26,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:35:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1436558539, now seen corresponding path program 1 times [2021-11-20 07:35:26,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859260908] [2021-11-20 07:35:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:26,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:35:26,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859260908] [2021-11-20 07:35:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859260908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:26,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989406208] [2021-11-20 07:35:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:26,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:26,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:26,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:26,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:35:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:26,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:35:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:35:27,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:35:27,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989406208] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:27,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:27,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-11-20 07:35:27,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279755615] [2021-11-20 07:35:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:27,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:35:27,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:35:27,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:35:27,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 153 [2021-11-20 07:35:27,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 129 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 116.71428571428571) internal successors, (817), 7 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:27,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:35:27,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 153 [2021-11-20 07:35:27,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:35:28,151 INFO L129 PetriNetUnfolder]: 170/586 cut-off events. [2021-11-20 07:35:28,152 INFO L130 PetriNetUnfolder]: For 167/189 co-relation queries the response was YES. [2021-11-20 07:35:28,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 586 events. 170/586 cut-off events. For 167/189 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2778 event pairs, 80 based on Foata normal form. 22/555 useless extension candidates. Maximal degree in co-relation 1005. Up to 135 conditions per place. [2021-11-20 07:35:28,162 INFO L132 encePairwiseOnDemand]: 145/153 looper letters, 35 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2021-11-20 07:35:28,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 138 transitions, 420 flow [2021-11-20 07:35:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:35:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 07:35:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 831 transitions. [2021-11-20 07:35:28,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759103641456583 [2021-11-20 07:35:28,167 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 831 transitions. [2021-11-20 07:35:28,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 831 transitions. [2021-11-20 07:35:28,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:35:28,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 831 transitions. [2021-11-20 07:35:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:28,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:28,178 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:28,179 INFO L186 Difference]: Start difference. First operand has 143 places, 129 transitions, 307 flow. Second operand 7 states and 831 transitions. [2021-11-20 07:35:28,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 138 transitions, 420 flow [2021-11-20 07:35:28,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 400 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-11-20 07:35:28,188 INFO L242 Difference]: Finished difference. Result has 143 places, 131 transitions, 321 flow [2021-11-20 07:35:28,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=321, PETRI_PLACES=143, PETRI_TRANSITIONS=131} [2021-11-20 07:35:28,190 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 6 predicate places. [2021-11-20 07:35:28,191 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 131 transitions, 321 flow [2021-11-20 07:35:28,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.71428571428571) internal successors, (817), 7 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:28,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:35:28,192 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] [2021-11-20 07:35:28,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:28,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:28,419 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:35:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1411804440, now seen corresponding path program 1 times [2021-11-20 07:35:28,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125639014] [2021-11-20 07:35:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:28,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:30,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125639014] [2021-11-20 07:35:30,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125639014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063829006] [2021-11-20 07:35:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:30,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:30,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:30,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:35:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 07:35:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:31,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 07:35:33,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:35:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:35:33,964 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:35:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-20 07:35:34,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:34,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 43 [2021-11-20 07:35:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:36,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:20,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:37:20,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3948354 treesize of output 3814478 [2021-11-20 07:43:24,839 WARN L227 SmtUtils]: Spent 6.07m on a formula simplification. DAG size of input: 2557 DAG size of output: 2557 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 07:43:24,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 07:43:24,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:43:24,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-20 07:43:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284739039] [2021-11-20 07:43:24,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:43:24,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:43:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:43:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=4280, Unknown=34, NotChecked=0, Total=4830 [2021-11-20 07:43:24,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 153 [2021-11-20 07:43:24,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 131 transitions, 321 flow. Second operand has 29 states, 29 states have (on average 64.51724137931035) internal successors, (1871), 29 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:24,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:43:24,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 153 [2021-11-20 07:43:24,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:43:28,841 INFO L129 PetriNetUnfolder]: 1274/2545 cut-off events. [2021-11-20 07:43:28,841 INFO L130 PetriNetUnfolder]: For 906/922 co-relation queries the response was YES. [2021-11-20 07:43:28,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5371 conditions, 2545 events. 1274/2545 cut-off events. For 906/922 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15350 event pairs, 140 based on Foata normal form. 1/2432 useless extension candidates. Maximal degree in co-relation 5361. Up to 986 conditions per place. [2021-11-20 07:43:28,875 INFO L132 encePairwiseOnDemand]: 121/153 looper letters, 182 selfloop transitions, 67 changer transitions 6/308 dead transitions. [2021-11-20 07:43:28,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 308 transitions, 1356 flow [2021-11-20 07:43:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:43:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-20 07:43:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2300 transitions. [2021-11-20 07:43:28,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4555357496533967 [2021-11-20 07:43:28,886 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2300 transitions. [2021-11-20 07:43:28,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2300 transitions. [2021-11-20 07:43:28,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:43:28,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2300 transitions. [2021-11-20 07:43:28,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 69.6969696969697) internal successors, (2300), 33 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:28,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 153.0) internal successors, (5202), 34 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:28,909 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 153.0) internal successors, (5202), 34 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:28,910 INFO L186 Difference]: Start difference. First operand has 143 places, 131 transitions, 321 flow. Second operand 33 states and 2300 transitions. [2021-11-20 07:43:28,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 308 transitions, 1356 flow [2021-11-20 07:43:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 308 transitions, 1331 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 07:43:28,925 INFO L242 Difference]: Finished difference. Result has 189 places, 191 transitions, 720 flow [2021-11-20 07:43:28,926 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=720, PETRI_PLACES=189, PETRI_TRANSITIONS=191} [2021-11-20 07:43:28,928 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 52 predicate places. [2021-11-20 07:43:28,929 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 191 transitions, 720 flow [2021-11-20 07:43:28,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 64.51724137931035) internal successors, (1871), 29 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:28,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:43:28,930 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] [2021-11-20 07:43:28,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:29,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:29,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:43:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -989334820, now seen corresponding path program 2 times [2021-11-20 07:43:29,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:43:29,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586469267] [2021-11-20 07:43:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:29,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:43:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:30,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:43:30,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586469267] [2021-11-20 07:43:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586469267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:43:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734064978] [2021-11-20 07:43:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:43:30,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:43:30,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:43:30,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:43:30,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:43:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:43:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 07:43:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:32,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:43:32,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 41 [2021-11-20 07:43:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:33,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:34,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:43:34,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 53 [2021-11-20 07:43:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734064978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:36,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:43:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 20] total 56 [2021-11-20 07:43:36,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820592430] [2021-11-20 07:43:36,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 07:43:36,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:43:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 07:43:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:43:36,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2021-11-20 07:43:36,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 191 transitions, 720 flow. Second operand has 56 states, 56 states have (on average 75.01785714285714) internal successors, (4201), 56 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:36,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:43:36,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2021-11-20 07:43:36,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:43:45,457 INFO L129 PetriNetUnfolder]: 2018/4361 cut-off events. [2021-11-20 07:43:45,457 INFO L130 PetriNetUnfolder]: For 3497/3629 co-relation queries the response was YES. [2021-11-20 07:43:45,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11147 conditions, 4361 events. 2018/4361 cut-off events. For 3497/3629 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31972 event pairs, 168 based on Foata normal form. 36/4233 useless extension candidates. Maximal degree in co-relation 11119. Up to 1454 conditions per place. [2021-11-20 07:43:45,563 INFO L132 encePairwiseOnDemand]: 120/153 looper letters, 262 selfloop transitions, 151 changer transitions 18/490 dead transitions. [2021-11-20 07:43:45,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 490 transitions, 2724 flow [2021-11-20 07:43:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 07:43:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-11-20 07:43:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4339 transitions. [2021-11-20 07:43:45,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5156268568033274 [2021-11-20 07:43:45,584 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4339 transitions. [2021-11-20 07:43:45,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4339 transitions. [2021-11-20 07:43:45,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:43:45,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4339 transitions. [2021-11-20 07:43:45,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 78.89090909090909) internal successors, (4339), 55 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:45,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 153.0) internal successors, (8568), 56 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:45,630 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 153.0) internal successors, (8568), 56 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:45,631 INFO L186 Difference]: Start difference. First operand has 189 places, 191 transitions, 720 flow. Second operand 55 states and 4339 transitions. [2021-11-20 07:43:45,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 490 transitions, 2724 flow [2021-11-20 07:43:45,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 490 transitions, 2682 flow, removed 13 selfloop flow, removed 10 redundant places. [2021-11-20 07:43:45,663 INFO L242 Difference]: Finished difference. Result has 254 places, 291 transitions, 1749 flow [2021-11-20 07:43:45,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1749, PETRI_PLACES=254, PETRI_TRANSITIONS=291} [2021-11-20 07:43:45,665 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 117 predicate places. [2021-11-20 07:43:45,665 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 291 transitions, 1749 flow [2021-11-20 07:43:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 75.01785714285714) internal successors, (4201), 56 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:45,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:43:45,668 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] [2021-11-20 07:43:45,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 07:43:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:45,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:43:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -328956086, now seen corresponding path program 3 times [2021-11-20 07:43:45,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:43:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149635843] [2021-11-20 07:43:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:43:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:47,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:43:47,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149635843] [2021-11-20 07:43:47,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149635843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:43:47,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220562495] [2021-11-20 07:43:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:43:47,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:43:47,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:43:47,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:43:47,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:43:47,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:43:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 07:43:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:49,866 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:43:49,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-20 07:43:50,158 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:43:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-20 07:43:50,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:43:50,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2021-11-20 07:43:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:43:53,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:56,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:43:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 475 treesize of output 435 [2021-11-20 07:43:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:43:57,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220562495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:57,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:43:57,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 25] total 66 [2021-11-20 07:43:57,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152816753] [2021-11-20 07:43:57,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:57,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 07:43:57,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:43:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 07:43:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:43:57,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 153 [2021-11-20 07:43:57,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 291 transitions, 1749 flow. Second operand has 66 states, 66 states have (on average 65.81818181818181) internal successors, (4344), 66 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:57,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:43:57,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 153 [2021-11-20 07:43:57,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:44:26,867 WARN L227 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:44:31,317 INFO L129 PetriNetUnfolder]: 6512/12845 cut-off events. [2021-11-20 07:44:31,317 INFO L130 PetriNetUnfolder]: For 30615/31892 co-relation queries the response was YES. [2021-11-20 07:44:31,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43534 conditions, 12845 events. 6512/12845 cut-off events. For 30615/31892 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 109439 event pairs, 133 based on Foata normal form. 302/12742 useless extension candidates. Maximal degree in co-relation 43485. Up to 3899 conditions per place. [2021-11-20 07:44:31,518 INFO L132 encePairwiseOnDemand]: 113/153 looper letters, 632 selfloop transitions, 921 changer transitions 24/1631 dead transitions. [2021-11-20 07:44:31,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1631 transitions, 13114 flow [2021-11-20 07:44:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-20 07:44:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-11-20 07:44:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 10196 transitions. [2021-11-20 07:44:31,539 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4595898129366689 [2021-11-20 07:44:31,539 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 10196 transitions. [2021-11-20 07:44:31,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 10196 transitions. [2021-11-20 07:44:31,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:44:31,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 10196 transitions. [2021-11-20 07:44:31,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 70.31724137931035) internal successors, (10196), 145 states have internal predecessors, (10196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:31,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 153.0) internal successors, (22338), 146 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:31,611 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 153.0) internal successors, (22338), 146 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:31,611 INFO L186 Difference]: Start difference. First operand has 254 places, 291 transitions, 1749 flow. Second operand 145 states and 10196 transitions. [2021-11-20 07:44:31,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1631 transitions, 13114 flow [2021-11-20 07:44:31,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1631 transitions, 12616 flow, removed 215 selfloop flow, removed 24 redundant places. [2021-11-20 07:44:31,946 INFO L242 Difference]: Finished difference. Result has 421 places, 1097 transitions, 10640 flow [2021-11-20 07:44:31,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=10640, PETRI_PLACES=421, PETRI_TRANSITIONS=1097} [2021-11-20 07:44:31,947 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 284 predicate places. [2021-11-20 07:44:31,948 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 1097 transitions, 10640 flow [2021-11-20 07:44:31,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 65.81818181818181) internal successors, (4344), 66 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:31,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:44:31,950 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] [2021-11-20 07:44:31,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:32,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:44:32,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:44:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:32,179 INFO L85 PathProgramCache]: Analyzing trace with hash 952041084, now seen corresponding path program 4 times [2021-11-20 07:44:32,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:44:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685243949] [2021-11-20 07:44:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:32,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:44:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:44:33,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:44:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685243949] [2021-11-20 07:44:33,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685243949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:44:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352404753] [2021-11-20 07:44:33,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:44:33,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:44:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:44:33,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:44:33,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:44:33,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:44:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:44:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:44:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:34,881 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 07:44:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2021-11-20 07:44:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:44:35,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:35,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:44:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 53 [2021-11-20 07:44:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:44:36,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352404753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:36,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:44:36,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 18] total 52 [2021-11-20 07:44:36,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101184616] [2021-11-20 07:44:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:36,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:44:36,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:44:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:44:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:44:36,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 153 [2021-11-20 07:44:36,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1097 transitions, 10640 flow. Second operand has 52 states, 52 states have (on average 71.59615384615384) internal successors, (3723), 52 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:36,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:44:36,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 153 [2021-11-20 07:44:36,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:44:49,360 INFO L129 PetriNetUnfolder]: 17669/30123 cut-off events. [2021-11-20 07:44:49,360 INFO L130 PetriNetUnfolder]: For 201433/201469 co-relation queries the response was YES. [2021-11-20 07:44:49,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133572 conditions, 30123 events. 17669/30123 cut-off events. For 201433/201469 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 266094 event pairs, 3108 based on Foata normal form. 10/26962 useless extension candidates. Maximal degree in co-relation 133476. Up to 18390 conditions per place. [2021-11-20 07:44:50,086 INFO L132 encePairwiseOnDemand]: 113/153 looper letters, 943 selfloop transitions, 456 changer transitions 10/1468 dead transitions. [2021-11-20 07:44:50,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1468 transitions, 16765 flow [2021-11-20 07:44:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:44:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-20 07:44:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3815 transitions. [2021-11-20 07:44:50,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4889145200563886 [2021-11-20 07:44:50,099 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3815 transitions. [2021-11-20 07:44:50,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3815 transitions. [2021-11-20 07:44:50,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:44:50,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3815 transitions. [2021-11-20 07:44:50,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 74.80392156862744) internal successors, (3815), 51 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:50,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 153.0) internal successors, (7956), 52 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:50,126 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 153.0) internal successors, (7956), 52 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:50,126 INFO L186 Difference]: Start difference. First operand has 421 places, 1097 transitions, 10640 flow. Second operand 51 states and 3815 transitions. [2021-11-20 07:44:50,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1468 transitions, 16765 flow [2021-11-20 07:45:01,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1468 transitions, 15377 flow, removed 600 selfloop flow, removed 36 redundant places. [2021-11-20 07:45:01,327 INFO L242 Difference]: Finished difference. Result has 448 places, 1271 transitions, 13096 flow [2021-11-20 07:45:01,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=9660, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=13096, PETRI_PLACES=448, PETRI_TRANSITIONS=1271} [2021-11-20 07:45:01,330 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 311 predicate places. [2021-11-20 07:45:01,331 INFO L470 AbstractCegarLoop]: Abstraction has has 448 places, 1271 transitions, 13096 flow [2021-11-20 07:45:01,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 71.59615384615384) internal successors, (3723), 52 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:01,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:45:01,333 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] [2021-11-20 07:45:01,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:45:01,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:45:01,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:45:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1212155222, now seen corresponding path program 5 times [2021-11-20 07:45:01,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:45:01,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46714484] [2021-11-20 07:45:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:45:01,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:45:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:45:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:03,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:45:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46714484] [2021-11-20 07:45:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46714484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:45:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106038079] [2021-11-20 07:45:03,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:45:03,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:45:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:45:03,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:45:03,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:45:03,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 07:45:03,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:45:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 07:45:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:05,319 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:45:05,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2021-11-20 07:45:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:05,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:45:06,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:45:06,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 53 [2021-11-20 07:45:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106038079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:45:07,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:45:07,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 19] total 49 [2021-11-20 07:45:07,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962062931] [2021-11-20 07:45:07,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:45:07,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:45:07,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:45:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:45:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:45:07,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2021-11-20 07:45:07,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1271 transitions, 13096 flow. Second operand has 49 states, 49 states have (on average 74.93877551020408) internal successors, (3672), 49 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:07,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:45:07,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2021-11-20 07:45:07,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:45:16,932 INFO L129 PetriNetUnfolder]: 7252/13910 cut-off events. [2021-11-20 07:45:16,932 INFO L130 PetriNetUnfolder]: For 110761/114610 co-relation queries the response was YES. [2021-11-20 07:45:17,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69070 conditions, 13910 events. 7252/13910 cut-off events. For 110761/114610 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 117815 event pairs, 817 based on Foata normal form. 370/13824 useless extension candidates. Maximal degree in co-relation 68965. Up to 8337 conditions per place. [2021-11-20 07:45:17,584 INFO L132 encePairwiseOnDemand]: 123/153 looper letters, 1003 selfloop transitions, 458 changer transitions 6/1530 dead transitions. [2021-11-20 07:45:17,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1530 transitions, 18904 flow [2021-11-20 07:45:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 07:45:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-20 07:45:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3425 transitions. [2021-11-20 07:45:17,596 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5087641117052881 [2021-11-20 07:45:17,597 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3425 transitions. [2021-11-20 07:45:17,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3425 transitions. [2021-11-20 07:45:17,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:45:17,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3425 transitions. [2021-11-20 07:45:17,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.8409090909091) internal successors, (3425), 44 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:17,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:17,637 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 153.0) internal successors, (6885), 45 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:17,638 INFO L186 Difference]: Start difference. First operand has 448 places, 1271 transitions, 13096 flow. Second operand 44 states and 3425 transitions. [2021-11-20 07:45:17,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1530 transitions, 18904 flow [2021-11-20 07:45:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1530 transitions, 18735 flow, removed 47 selfloop flow, removed 24 redundant places. [2021-11-20 07:45:21,312 INFO L242 Difference]: Finished difference. Result has 476 places, 1423 transitions, 16689 flow [2021-11-20 07:45:21,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=12961, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16689, PETRI_PLACES=476, PETRI_TRANSITIONS=1423} [2021-11-20 07:45:21,315 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 339 predicate places. [2021-11-20 07:45:21,315 INFO L470 AbstractCegarLoop]: Abstraction has has 476 places, 1423 transitions, 16689 flow [2021-11-20 07:45:21,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.93877551020408) internal successors, (3672), 49 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:21,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:45:21,317 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] [2021-11-20 07:45:21,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 07:45:21,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:45:21,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:45:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1737586348, now seen corresponding path program 6 times [2021-11-20 07:45:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:45:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972015697] [2021-11-20 07:45:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:45:21,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:45:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:45:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:23,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:45:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972015697] [2021-11-20 07:45:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972015697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:45:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985329564] [2021-11-20 07:45:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:45:23,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:45:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:45:23,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:45:23,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:45:23,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 07:45:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:45:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:45:23,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:24,536 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:45:25,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:45:25,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2021-11-20 07:45:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:45:27,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:45:28,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:45:28,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 53 [2021-11-20 07:45:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:45:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985329564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:45:30,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:45:30,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 17] total 54 [2021-11-20 07:45:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131188814] [2021-11-20 07:45:30,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:45:30,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 07:45:30,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:45:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 07:45:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2414, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 07:45:30,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2021-11-20 07:45:30,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1423 transitions, 16689 flow. Second operand has 54 states, 54 states have (on average 74.33333333333333) internal successors, (4014), 54 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:30,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:45:30,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2021-11-20 07:45:30,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 07:45:55,588 INFO L129 PetriNetUnfolder]: 9499/17831 cut-off events. [2021-11-20 07:45:55,588 INFO L130 PetriNetUnfolder]: For 176332/182285 co-relation queries the response was YES. [2021-11-20 07:45:56,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96834 conditions, 17831 events. 9499/17831 cut-off events. For 176332/182285 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 154824 event pairs, 411 based on Foata normal form. 1127/18448 useless extension candidates. Maximal degree in co-relation 96720. Up to 7258 conditions per place. [2021-11-20 07:45:56,373 INFO L132 encePairwiseOnDemand]: 120/153 looper letters, 734 selfloop transitions, 1550 changer transitions 19/2361 dead transitions. [2021-11-20 07:45:56,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2361 transitions, 32637 flow [2021-11-20 07:45:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-20 07:45:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-11-20 07:45:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 8574 transitions. [2021-11-20 07:45:56,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5003501400560224 [2021-11-20 07:45:56,390 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 8574 transitions. [2021-11-20 07:45:56,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 8574 transitions. [2021-11-20 07:45:56,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 07:45:56,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 8574 transitions. [2021-11-20 07:45:56,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 76.55357142857143) internal successors, (8574), 112 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:56,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 153.0) internal successors, (17289), 113 states have internal predecessors, (17289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:56,439 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 153.0) internal successors, (17289), 113 states have internal predecessors, (17289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:45:56,440 INFO L186 Difference]: Start difference. First operand has 476 places, 1423 transitions, 16689 flow. Second operand 112 states and 8574 transitions. [2021-11-20 07:45:56,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2361 transitions, 32637 flow [2021-11-20 07:46:01,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 2361 transitions, 32183 flow, removed 173 selfloop flow, removed 27 redundant places. [2021-11-20 07:46:01,324 INFO L242 Difference]: Finished difference. Result has 592 places, 2085 transitions, 30591 flow [2021-11-20 07:46:01,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=16420, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=939, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=30591, PETRI_PLACES=592, PETRI_TRANSITIONS=2085} [2021-11-20 07:46:01,327 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 455 predicate places. [2021-11-20 07:46:01,327 INFO L470 AbstractCegarLoop]: Abstraction has has 592 places, 2085 transitions, 30591 flow [2021-11-20 07:46:01,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 74.33333333333333) internal successors, (4014), 54 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:46:01,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 07:46:01,328 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] [2021-11-20 07:46:01,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 07:46:01,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:01,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-20 07:46:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash -296442568, now seen corresponding path program 7 times [2021-11-20 07:46:01,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:01,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378720590] [2021-11-20 07:46:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:01,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:46:02,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378720590] [2021-11-20 07:46:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378720590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:46:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752090636] [2021-11-20 07:46:02,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:46:02,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:02,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:02,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c1316-ef69-4f98-a79c-a9ea1863bbcf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:46:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:46:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:04,176 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 07:46:04,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2021-11-20 07:46:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:46:04,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:04,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:46:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 53 [2021-11-20 07:46:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:46:06,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752090636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:06,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:46:06,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 18] total 52 [2021-11-20 07:46:06,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119391943] [2021-11-20 07:46:06,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:06,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:46:06,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:46:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:46:06,174 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 153 [2021-11-20 07:46:06,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 2085 transitions, 30591 flow. Second operand has 52 states, 52 states have (on average 71.57692307692308) internal successors, (3722), 52 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:46:06,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 07:46:06,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 153 [2021-11-20 07:46:06,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand