./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:47:28,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:47:28,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:47:28,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:47:28,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:47:28,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:47:28,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:47:28,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:47:28,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:47:28,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:47:28,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:47:28,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:47:28,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:47:28,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:47:28,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:47:28,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:47:28,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:47:28,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:47:28,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:47:28,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:47:28,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:47:28,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:47:28,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:47:28,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:47:28,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:47:28,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:47:28,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:47:28,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:47:28,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:47:28,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:47:28,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:47:28,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:47:28,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:47:28,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:47:28,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:47:28,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:47:28,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:47:28,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:47:28,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:47:28,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:47:28,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:47:28,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:47:28,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:47:28,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:47:28,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:47:28,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:47:28,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:47:28,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:47:28,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:47:28,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:47:28,486 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:47:28,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:47:28,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:47:28,488 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:47:28,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:47:28,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:47:28,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:47:28,489 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:47:28,489 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:47:28,489 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:47:28,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:47:28,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:47:28,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:47:28,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:47:28,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:47:28,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:47:28,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:47:28,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:28,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:47:28,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:47:28,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:47:28,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:47:28,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:47:28,493 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:47:28,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:47:28,494 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2022-11-25 17:47:28,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:47:28,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:47:28,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:47:28,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:47:28,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:47:28,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-25 17:47:31,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:47:32,180 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:47:32,181 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-25 17:47:32,194 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/data/798c9ab3c/edd40111bb2b486894433378b6f43010/FLAG506b5bc22 [2022-11-25 17:47:32,209 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/data/798c9ab3c/edd40111bb2b486894433378b6f43010 [2022-11-25 17:47:32,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:47:32,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:47:32,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:32,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:47:32,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:47:32,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f146a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32, skipping insertion in model container [2022-11-25 17:47:32,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:47:32,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:47:32,456 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:47:32,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:32,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:32,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:32,592 WARN L237 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_a128aad9-ea0e-4006-a147-caf337b5545d/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-25 17:47:32,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:32,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:32,611 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:47:32,626 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-25 17:47:32,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:32,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:32,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:32,648 WARN L237 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_a128aad9-ea0e-4006-a147-caf337b5545d/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-25 17:47:32,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:32,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:32,697 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:47:32,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32 WrapperNode [2022-11-25 17:47:32,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:32,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:32,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:47:32,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:47:32,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,759 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-11-25 17:47:32,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:32,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:47:32,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:47:32,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:47:32,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:47:32,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:47:32,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:47:32,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:47:32,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (1/1) ... [2022-11-25 17:47:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:32,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:47:32,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a128aad9-ea0e-4006-a147-caf337b5545d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:47:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:47:32,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:47:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:47:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:47:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:47:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:47:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:47:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:47:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:47:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:47:32,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:47:32,875 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:47:33,028 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:47:33,032 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:47:33,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:47:33,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:47:33,268 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:47:33,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:33 BoogieIcfgContainer [2022-11-25 17:47:33,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:47:33,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:47:33,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:47:33,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:47:33,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:47:32" (1/3) ... [2022-11-25 17:47:33,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee9efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:33, skipping insertion in model container [2022-11-25 17:47:33,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:32" (2/3) ... [2022-11-25 17:47:33,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee9efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:33, skipping insertion in model container [2022-11-25 17:47:33,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:33" (3/3) ... [2022-11-25 17:47:33,279 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2022-11-25 17:47:33,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:47:33,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 17:47:33,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:47:33,392 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:47:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,506 INFO L130 PetriNetUnfolder]: 2/64 cut-off events. [2022-11-25 17:47:33,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:33,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 2/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 98 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2022-11-25 17:47:33,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,524 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:33,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 101 flow [2022-11-25 17:47:33,637 INFO L130 PetriNetUnfolder]: 2/64 cut-off events. [2022-11-25 17:47:33,639 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:33,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 2/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 98 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2022-11-25 17:47:33,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 380 [2022-11-25 17:47:35,127 INFO L134 LiptonReduction]: Checked pairs total: 342 [2022-11-25 17:47:35,127 INFO L136 LiptonReduction]: Total number of compositions: 47 [2022-11-25 17:47:35,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:35,150 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:35,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:47:35,153 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:47:35,153 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:35,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:35,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:35,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:47:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 6546, now seen corresponding path program 1 times [2022-11-25 17:47:35,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:35,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318659527] [2022-11-25 17:47:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318659527] [2022-11-25 17:47:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318659527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:35,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:35,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097193614] [2022-11-25 17:47:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:35,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:35,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 95 [2022-11-25 17:47:35,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:35,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 95 [2022-11-25 17:47:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:35,501 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 17:47:35,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:35,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 3 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2022-11-25 17:47:35,505 INFO L137 encePairwiseOnDemand]: 90/95 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2022-11-25 17:47:35,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2022-11-25 17:47:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2022-11-25 17:47:35,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4245614035087719 [2022-11-25 17:47:35,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2022-11-25 17:47:35,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2022-11-25 17:47:35,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:35,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2022-11-25 17:47:35,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,545 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 121 transitions. [2022-11-25 17:47:35,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2022-11-25 17:47:35,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:35,553 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2022-11-25 17:47:35,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2022-11-25 17:47:35,559 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-11-25 17:47:35,559 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2022-11-25 17:47:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:35,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:35,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:47:35,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:47:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 6545, now seen corresponding path program 1 times [2022-11-25 17:47:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807937725] [2022-11-25 17:47:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:35,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:35,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807937725] [2022-11-25 17:47:35,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807937725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:35,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:35,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:35,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282731392] [2022-11-25 17:47:35,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:35,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:35,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:35,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:35,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 95 [2022-11-25 17:47:35,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:35,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 95 [2022-11-25 17:47:35,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:35,738 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-11-25 17:47:35,738 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:35,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 24. Up to 10 conditions per place. [2022-11-25 17:47:35,739 INFO L137 encePairwiseOnDemand]: 93/95 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2022-11-25 17:47:35,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2022-11-25 17:47:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2022-11-25 17:47:35,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2022-11-25 17:47:35,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2022-11-25 17:47:35,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2022-11-25 17:47:35,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:35,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2022-11-25 17:47:35,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,745 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 123 transitions. [2022-11-25 17:47:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2022-11-25 17:47:35,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:35,746 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2022-11-25 17:47:35,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2022-11-25 17:47:35,747 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-11-25 17:47:35,747 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2022-11-25 17:47:35,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:35,748 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:47:35,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:47:35,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-25 17:47:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1755287207, now seen corresponding path program 1 times [2022-11-25 17:47:35,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:35,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833443566] [2022-11-25 17:47:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:35,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:35,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:35,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:35,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:35,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 17:47:35,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-11-25 17:47:35,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2022-11-25 17:47:35,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-11-25 17:47:35,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2022-11-25 17:47:35,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-11-25 17:47:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:47:35,800 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:47:35,803 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:35,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:47:35,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:47:35,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,834 INFO L130 PetriNetUnfolder]: 3/93 cut-off events. [2022-11-25 17:47:35,834 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:47:35,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 3/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-11-25 17:47:35,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,836 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:35,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 59 transitions, 130 flow [2022-11-25 17:47:35,851 INFO L130 PetriNetUnfolder]: 3/93 cut-off events. [2022-11-25 17:47:35,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:47:35,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 3/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-11-25 17:47:35,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 980 [2022-11-25 17:47:37,352 INFO L134 LiptonReduction]: Checked pairs total: 1316 [2022-11-25 17:47:37,352 INFO L136 LiptonReduction]: Total number of compositions: 49 [2022-11-25 17:47:37,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:37,361 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:37,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:47:37,364 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:47:37,364 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:37,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:37,365 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:37,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash 10357, now seen corresponding path program 1 times [2022-11-25 17:47:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784030176] [2022-11-25 17:47:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784030176] [2022-11-25 17:47:37,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784030176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:37,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:37,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335891032] [2022-11-25 17:47:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:37,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:37,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:47:37,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:37,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:47:37,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:37,526 INFO L130 PetriNetUnfolder]: 66/143 cut-off events. [2022-11-25 17:47:37,527 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-25 17:47:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 143 events. 66/143 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 612 event pairs, 66 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 84. Up to 129 conditions per place. [2022-11-25 17:47:37,535 INFO L137 encePairwiseOnDemand]: 104/108 looper letters, 10 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2022-11-25 17:47:37,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 62 flow [2022-11-25 17:47:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-11-25 17:47:37,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2022-11-25 17:47:37,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-11-25 17:47:37,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-11-25 17:47:37,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:37,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-11-25 17:47:37,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,551 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 3 states and 149 transitions. [2022-11-25 17:47:37,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 62 flow [2022-11-25 17:47:37,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 60 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:37,553 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 40 flow [2022-11-25 17:47:37,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2022-11-25 17:47:37,556 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-11-25 17:47:37,556 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 40 flow [2022-11-25 17:47:37,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:37,557 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:47:37,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 10356, now seen corresponding path program 1 times [2022-11-25 17:47:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:37,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834902579] [2022-11-25 17:47:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834902579] [2022-11-25 17:47:37,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834902579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:37,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:37,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195394603] [2022-11-25 17:47:37,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:37,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:37,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:37,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2022-11-25 17:47:37,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:37,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2022-11-25 17:47:37,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:37,729 INFO L130 PetriNetUnfolder]: 39/95 cut-off events. [2022-11-25 17:47:37,730 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:47:37,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 95 events. 39/95 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 355 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 192. Up to 81 conditions per place. [2022-11-25 17:47:37,731 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 9 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2022-11-25 17:47:37,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 13 transitions, 58 flow [2022-11-25 17:47:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2022-11-25 17:47:37,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2022-11-25 17:47:37,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:37,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,736 INFO L175 Difference]: Start difference. First operand has 21 places, 14 transitions, 40 flow. Second operand 3 states and 152 transitions. [2022-11-25 17:47:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 13 transitions, 58 flow [2022-11-25 17:47:37,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:37,737 INFO L231 Difference]: Finished difference. Result has 21 places, 13 transitions, 39 flow [2022-11-25 17:47:37,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=21, PETRI_TRANSITIONS=13} [2022-11-25 17:47:37,738 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-11-25 17:47:37,738 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 13 transitions, 39 flow [2022-11-25 17:47:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:37,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:47:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:47:37,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash 308818922, now seen corresponding path program 1 times [2022-11-25 17:47:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82517081] [2022-11-25 17:47:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:37,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:37,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82517081] [2022-11-25 17:47:37,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82517081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:37,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:37,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393982555] [2022-11-25 17:47:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:37,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:37,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:47:37,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 13 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:37,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:47:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:37,827 INFO L130 PetriNetUnfolder]: 42/97 cut-off events. [2022-11-25 17:47:37,827 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:47:37,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 97 events. 42/97 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 400 event pairs, 16 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 199. Up to 47 conditions per place. [2022-11-25 17:47:37,828 INFO L137 encePairwiseOnDemand]: 104/108 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2022-11-25 17:47:37,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 88 flow [2022-11-25 17:47:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2022-11-25 17:47:37,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2022-11-25 17:47:37,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:37,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2022-11-25 17:47:37,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,832 INFO L175 Difference]: Start difference. First operand has 21 places, 13 transitions, 39 flow. Second operand 3 states and 152 transitions. [2022-11-25 17:47:37,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 88 flow [2022-11-25 17:47:37,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:37,834 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 60 flow [2022-11-25 17:47:37,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2022-11-25 17:47:37,835 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2022-11-25 17:47:37,835 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 60 flow [2022-11-25 17:47:37,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:37,835 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:47:37,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -33097421, now seen corresponding path program 1 times [2022-11-25 17:47:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:37,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537569033] [2022-11-25 17:47:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:37,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537569033] [2022-11-25 17:47:37,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537569033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:37,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:37,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817720702] [2022-11-25 17:47:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:37,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:37,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:47:37,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:37,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:47:37,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:37,977 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2022-11-25 17:47:37,977 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:47:37,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 392 event pairs, 18 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 235. Up to 41 conditions per place. [2022-11-25 17:47:37,982 INFO L137 encePairwiseOnDemand]: 104/108 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2022-11-25 17:47:37,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 106 flow [2022-11-25 17:47:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-11-25 17:47:37,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 17:47:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-11-25 17:47:37,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-11-25 17:47:37,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:37,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-11-25 17:47:37,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,989 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 60 flow. Second operand 3 states and 150 transitions. [2022-11-25 17:47:37,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 106 flow [2022-11-25 17:47:37,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 98 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:37,993 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 82 flow [2022-11-25 17:47:37,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2022-11-25 17:47:37,996 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2022-11-25 17:47:37,996 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 82 flow [2022-11-25 17:47:37,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:37,997 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:47:38,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1024689850, now seen corresponding path program 1 times [2022-11-25 17:47:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:38,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413531190] [2022-11-25 17:47:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:38,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:38,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:38,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413531190] [2022-11-25 17:47:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413531190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:38,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941907462] [2022-11-25 17:47:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:38,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:47:38,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:38,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:47:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:38,207 INFO L130 PetriNetUnfolder]: 29/78 cut-off events. [2022-11-25 17:47:38,207 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-25 17:47:38,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 312 event pairs, 6 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 235. Up to 61 conditions per place. [2022-11-25 17:47:38,208 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2022-11-25 17:47:38,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 123 flow [2022-11-25 17:47:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-11-25 17:47:38,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2022-11-25 17:47:38,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-11-25 17:47:38,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-11-25 17:47:38,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:38,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-11-25 17:47:38,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,213 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 82 flow. Second operand 3 states and 149 transitions. [2022-11-25 17:47:38,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 123 flow [2022-11-25 17:47:38,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 115 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:38,216 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 74 flow [2022-11-25 17:47:38,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2022-11-25 17:47:38,217 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2022-11-25 17:47:38,217 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 74 flow [2022-11-25 17:47:38,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:38,218 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:47:38,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1026017900, now seen corresponding path program 1 times [2022-11-25 17:47:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:38,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911266783] [2022-11-25 17:47:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911266783] [2022-11-25 17:47:38,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911266783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:38,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:38,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514335856] [2022-11-25 17:47:38,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:38,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:38,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 108 [2022-11-25 17:47:38,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:38,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 108 [2022-11-25 17:47:38,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:38,325 INFO L130 PetriNetUnfolder]: 25/76 cut-off events. [2022-11-25 17:47:38,325 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-25 17:47:38,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 307 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 215. Up to 45 conditions per place. [2022-11-25 17:47:38,327 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2022-11-25 17:47:38,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 17 transitions, 104 flow [2022-11-25 17:47:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2022-11-25 17:47:38,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2022-11-25 17:47:38,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2022-11-25 17:47:38,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2022-11-25 17:47:38,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2022-11-25 17:47:38,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,331 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 74 flow. Second operand 3 states and 147 transitions. [2022-11-25 17:47:38,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 17 transitions, 104 flow [2022-11-25 17:47:38,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:38,335 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 72 flow [2022-11-25 17:47:38,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2022-11-25 17:47:38,338 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2022-11-25 17:47:38,338 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 72 flow [2022-11-25 17:47:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:38,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:38,338 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:47:38,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:47:38,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:38,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1743945122, now seen corresponding path program 1 times [2022-11-25 17:47:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:38,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975844419] [2022-11-25 17:47:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:38,369 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:38,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:38,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:38,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:47:38,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-11-25 17:47:38,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2022-11-25 17:47:38,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 17:47:38,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 17:47:38,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 17:47:38,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 17:47:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:47:38,396 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:38,396 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:38,396 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:47:38,418 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:47:38,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,447 INFO L130 PetriNetUnfolder]: 4/122 cut-off events. [2022-11-25 17:47:38,447 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:47:38,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 122 events. 4/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2022-11-25 17:47:38,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,449 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:38,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2022-11-25 17:47:38,466 INFO L130 PetriNetUnfolder]: 4/122 cut-off events. [2022-11-25 17:47:38,466 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:47:38,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 122 events. 4/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2022-11-25 17:47:38,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 1800 [2022-11-25 17:47:40,072 INFO L134 LiptonReduction]: Checked pairs total: 2980 [2022-11-25 17:47:40,072 INFO L136 LiptonReduction]: Total number of compositions: 56 [2022-11-25 17:47:40,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:40,074 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:40,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 17:47:40,075 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:47:40,076 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:40,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:40,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 14744, now seen corresponding path program 1 times [2022-11-25 17:47:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970422970] [2022-11-25 17:47:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:40,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970422970] [2022-11-25 17:47:40,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970422970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896843436] [2022-11-25 17:47:40,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:47:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:47:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:47:40,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 126 [2022-11-25 17:47:40,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 63 flow. Second operand has 2 states, 2 states have (on average 60.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 126 [2022-11-25 17:47:40,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:40,206 INFO L130 PetriNetUnfolder]: 621/1019 cut-off events. [2022-11-25 17:47:40,207 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-11-25 17:47:40,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111 conditions, 1019 events. 621/1019 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 5515 event pairs, 621 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 399. Up to 962 conditions per place. [2022-11-25 17:47:40,214 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 16 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2022-11-25 17:47:40,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 91 flow [2022-11-25 17:47:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:47:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:47:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2022-11-25 17:47:40,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2022-11-25 17:47:40,216 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 136 transitions. [2022-11-25 17:47:40,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 136 transitions. [2022-11-25 17:47:40,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:40,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 136 transitions. [2022-11-25 17:47:40,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,218 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,218 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 63 flow. Second operand 2 states and 136 transitions. [2022-11-25 17:47:40,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 91 flow [2022-11-25 17:47:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 85 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:40,220 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 53 flow [2022-11-25 17:47:40,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2022-11-25 17:47:40,220 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-11-25 17:47:40,221 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 53 flow [2022-11-25 17:47:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 60.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:47:40,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 14742, now seen corresponding path program 1 times [2022-11-25 17:47:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10762219] [2022-11-25 17:47:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:40,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10762219] [2022-11-25 17:47:40,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10762219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639426554] [2022-11-25 17:47:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:40,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:40,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2022-11-25 17:47:40,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2022-11-25 17:47:40,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:40,390 INFO L130 PetriNetUnfolder]: 450/763 cut-off events. [2022-11-25 17:47:40,390 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:47:40,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 763 events. 450/763 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3972 event pairs, 450 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 1546. Up to 705 conditions per place. [2022-11-25 17:47:40,396 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2022-11-25 17:47:40,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 81 flow [2022-11-25 17:47:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2022-11-25 17:47:40,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 17:47:40,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2022-11-25 17:47:40,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2022-11-25 17:47:40,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:40,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2022-11-25 17:47:40,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,400 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 53 flow. Second operand 3 states and 175 transitions. [2022-11-25 17:47:40,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 81 flow [2022-11-25 17:47:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 81 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:40,401 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 53 flow [2022-11-25 17:47:40,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2022-11-25 17:47:40,402 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-11-25 17:47:40,402 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 53 flow [2022-11-25 17:47:40,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:40,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:47:40,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 14743, now seen corresponding path program 1 times [2022-11-25 17:47:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207303486] [2022-11-25 17:47:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207303486] [2022-11-25 17:47:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207303486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987867430] [2022-11-25 17:47:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:40,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 126 [2022-11-25 17:47:40,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 126 [2022-11-25 17:47:40,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:40,519 INFO L130 PetriNetUnfolder]: 279/507 cut-off events. [2022-11-25 17:47:40,520 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:47:40,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 507 events. 279/507 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2419 event pairs, 279 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 1035. Up to 449 conditions per place. [2022-11-25 17:47:40,523 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 17:47:40,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 79 flow [2022-11-25 17:47:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2022-11-25 17:47:40,525 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-11-25 17:47:40,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:40,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,528 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 53 flow. Second operand 3 states and 180 transitions. [2022-11-25 17:47:40,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 79 flow [2022-11-25 17:47:40,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:40,529 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 52 flow [2022-11-25 17:47:40,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2022-11-25 17:47:40,530 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-11-25 17:47:40,530 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 52 flow [2022-11-25 17:47:40,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,530 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:47:40,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:47:40,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash 439521117, now seen corresponding path program 1 times [2022-11-25 17:47:40,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051520698] [2022-11-25 17:47:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:40,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051520698] [2022-11-25 17:47:40,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051520698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:40,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218583628] [2022-11-25 17:47:40,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:40,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:40,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:40,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:40,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:40,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:40,662 INFO L130 PetriNetUnfolder]: 370/649 cut-off events. [2022-11-25 17:47:40,662 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-11-25 17:47:40,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 649 events. 370/649 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3504 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 1344. Up to 363 conditions per place. [2022-11-25 17:47:40,667 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-11-25 17:47:40,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 130 flow [2022-11-25 17:47:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2022-11-25 17:47:40,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2022-11-25 17:47:40,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2022-11-25 17:47:40,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2022-11-25 17:47:40,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:40,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2022-11-25 17:47:40,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,671 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 52 flow. Second operand 3 states and 181 transitions. [2022-11-25 17:47:40,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 130 flow [2022-11-25 17:47:40,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:40,673 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 81 flow [2022-11-25 17:47:40,673 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2022-11-25 17:47:40,674 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2022-11-25 17:47:40,674 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 81 flow [2022-11-25 17:47:40,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,674 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:40,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:47:40,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2587118, now seen corresponding path program 1 times [2022-11-25 17:47:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481176310] [2022-11-25 17:47:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:40,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481176310] [2022-11-25 17:47:40,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481176310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576813854] [2022-11-25 17:47:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:40,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:40,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:40,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:40,848 INFO L130 PetriNetUnfolder]: 432/765 cut-off events. [2022-11-25 17:47:40,849 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2022-11-25 17:47:40,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4409 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1991. Up to 429 conditions per place. [2022-11-25 17:47:40,855 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2022-11-25 17:47:40,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 182 flow [2022-11-25 17:47:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2022-11-25 17:47:40,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-11-25 17:47:40,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:40,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2022-11-25 17:47:40,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,860 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 81 flow. Second operand 3 states and 180 transitions. [2022-11-25 17:47:40,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 182 flow [2022-11-25 17:47:40,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:40,862 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 121 flow [2022-11-25 17:47:40,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2022-11-25 17:47:40,863 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2022-11-25 17:47:40,863 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 121 flow [2022-11-25 17:47:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:40,864 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:47:40,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash 81670323, now seen corresponding path program 1 times [2022-11-25 17:47:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:40,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220262103] [2022-11-25 17:47:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220262103] [2022-11-25 17:47:40,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220262103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144710299] [2022-11-25 17:47:40,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:40,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:40,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:40,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:40,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:41,028 INFO L130 PetriNetUnfolder]: 352/619 cut-off events. [2022-11-25 17:47:41,028 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2022-11-25 17:47:41,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3496 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1881. Up to 512 conditions per place. [2022-11-25 17:47:41,034 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-11-25 17:47:41,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 227 flow [2022-11-25 17:47:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2022-11-25 17:47:41,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2022-11-25 17:47:41,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2022-11-25 17:47:41,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2022-11-25 17:47:41,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:41,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2022-11-25 17:47:41,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,038 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 121 flow. Second operand 3 states and 179 transitions. [2022-11-25 17:47:41,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 227 flow [2022-11-25 17:47:41,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:41,041 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 109 flow [2022-11-25 17:47:41,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-25 17:47:41,042 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2022-11-25 17:47:41,043 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 109 flow [2022-11-25 17:47:41,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:41,043 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:47:41,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash 80202793, now seen corresponding path program 1 times [2022-11-25 17:47:41,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308585691] [2022-11-25 17:47:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308585691] [2022-11-25 17:47:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308585691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:41,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391278677] [2022-11-25 17:47:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:41,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:41,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:41,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:41,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:41,213 INFO L130 PetriNetUnfolder]: 285/518 cut-off events. [2022-11-25 17:47:41,214 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2022-11-25 17:47:41,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2833 event pairs, 51 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 1521. Up to 412 conditions per place. [2022-11-25 17:47:41,218 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2022-11-25 17:47:41,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 194 flow [2022-11-25 17:47:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2022-11-25 17:47:41,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2022-11-25 17:47:41,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2022-11-25 17:47:41,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2022-11-25 17:47:41,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:41,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2022-11-25 17:47:41,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,225 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 109 flow. Second operand 3 states and 176 transitions. [2022-11-25 17:47:41,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 194 flow [2022-11-25 17:47:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:41,228 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 107 flow [2022-11-25 17:47:41,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2022-11-25 17:47:41,229 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2022-11-25 17:47:41,229 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 107 flow [2022-11-25 17:47:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:41,230 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:47:41,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1343798742, now seen corresponding path program 1 times [2022-11-25 17:47:41,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154244009] [2022-11-25 17:47:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:47:41,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:41,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154244009] [2022-11-25 17:47:41,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154244009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:41,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:41,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276268739] [2022-11-25 17:47:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:41,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:41,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:41,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:41,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:41,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:41,385 INFO L130 PetriNetUnfolder]: 284/582 cut-off events. [2022-11-25 17:47:41,385 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2022-11-25 17:47:41,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3500 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 1681. Up to 341 conditions per place. [2022-11-25 17:47:41,391 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2022-11-25 17:47:41,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 215 flow [2022-11-25 17:47:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2022-11-25 17:47:41,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 17:47:41,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2022-11-25 17:47:41,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2022-11-25 17:47:41,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:41,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2022-11-25 17:47:41,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,394 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 107 flow. Second operand 3 states and 175 transitions. [2022-11-25 17:47:41,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 215 flow [2022-11-25 17:47:41,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:41,396 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 183 flow [2022-11-25 17:47:41,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2022-11-25 17:47:41,397 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2022-11-25 17:47:41,397 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 183 flow [2022-11-25 17:47:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:41,397 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:47:41,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1291914693, now seen corresponding path program 1 times [2022-11-25 17:47:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987257007] [2022-11-25 17:47:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:47:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987257007] [2022-11-25 17:47:41,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987257007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:41,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:41,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190113732] [2022-11-25 17:47:41,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:41,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:41,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:41,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 126 [2022-11-25 17:47:41,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:41,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 126 [2022-11-25 17:47:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:41,541 INFO L130 PetriNetUnfolder]: 237/505 cut-off events. [2022-11-25 17:47:41,542 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2022-11-25 17:47:41,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3002 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 1749. Up to 316 conditions per place. [2022-11-25 17:47:41,546 INFO L137 encePairwiseOnDemand]: 124/126 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2022-11-25 17:47:41,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 275 flow [2022-11-25 17:47:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2022-11-25 17:47:41,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2022-11-25 17:47:41,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2022-11-25 17:47:41,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2022-11-25 17:47:41,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:41,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2022-11-25 17:47:41,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,550 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 183 flow. Second operand 3 states and 173 transitions. [2022-11-25 17:47:41,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 275 flow [2022-11-25 17:47:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:41,554 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 169 flow [2022-11-25 17:47:41,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-11-25 17:47:41,555 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2022-11-25 17:47:41,555 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 169 flow [2022-11-25 17:47:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:41,555 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:47:41,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 17:47:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1392027901, now seen corresponding path program 1 times [2022-11-25 17:47:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600880724] [2022-11-25 17:47:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:41,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:41,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:41,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:41,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-25 17:47:41,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2022-11-25 17:47:41,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2022-11-25 17:47:41,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-25 17:47:41,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-25 17:47:41,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-11-25 17:47:41,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-11-25 17:47:41,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-25 17:47:41,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:47:41,588 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,589 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:41,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:47:41,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:47:41,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,631 INFO L130 PetriNetUnfolder]: 5/151 cut-off events. [2022-11-25 17:47:41,631 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:47:41,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 151 events. 5/151 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 130. Up to 10 conditions per place. [2022-11-25 17:47:41,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,634 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:41,634 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 81 transitions, 194 flow [2022-11-25 17:47:41,648 INFO L130 PetriNetUnfolder]: 5/151 cut-off events. [2022-11-25 17:47:41,648 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:47:41,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 151 events. 5/151 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 130. Up to 10 conditions per place. [2022-11-25 17:47:41,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 2840 [2022-11-25 17:47:43,430 INFO L134 LiptonReduction]: Checked pairs total: 4291 [2022-11-25 17:47:43,430 INFO L136 LiptonReduction]: Total number of compositions: 63 [2022-11-25 17:47:43,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:43,432 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:43,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 17:47:43,435 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:47:43,435 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:43,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:43,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:43,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash 19698, now seen corresponding path program 1 times [2022-11-25 17:47:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756809837] [2022-11-25 17:47:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:43,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:43,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756809837] [2022-11-25 17:47:43,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756809837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:43,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:43,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009249406] [2022-11-25 17:47:43,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:43,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 144 [2022-11-25 17:47:43,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:43,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 144 [2022-11-25 17:47:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:43,899 INFO L130 PetriNetUnfolder]: 2562/3819 cut-off events. [2022-11-25 17:47:43,899 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2022-11-25 17:47:43,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8064 conditions, 3819 events. 2562/3819 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 21287 event pairs, 2562 based on Foata normal form. 0/2454 useless extension candidates. Maximal degree in co-relation 1631. Up to 3585 conditions per place. [2022-11-25 17:47:43,927 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2022-11-25 17:47:43,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2022-11-25 17:47:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2022-11-25 17:47:43,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2022-11-25 17:47:43,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 205 transitions. [2022-11-25 17:47:43,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 205 transitions. [2022-11-25 17:47:43,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:43,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 205 transitions. [2022-11-25 17:47:43,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,932 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 3 states and 205 transitions. [2022-11-25 17:47:43,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2022-11-25 17:47:43,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 22 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:43,934 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 66 flow [2022-11-25 17:47:43,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2022-11-25 17:47:43,935 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2022-11-25 17:47:43,935 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 66 flow [2022-11-25 17:47:43,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:43,936 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:43,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:47:43,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash 19699, now seen corresponding path program 1 times [2022-11-25 17:47:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:43,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436104524] [2022-11-25 17:47:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:43,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436104524] [2022-11-25 17:47:43,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436104524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:43,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:43,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:43,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316721966] [2022-11-25 17:47:43,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:44,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 144 [2022-11-25 17:47:44,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:44,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 144 [2022-11-25 17:47:44,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:44,262 INFO L130 PetriNetUnfolder]: 1623/2539 cut-off events. [2022-11-25 17:47:44,262 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-25 17:47:44,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5170 conditions, 2539 events. 1623/2539 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 13660 event pairs, 1623 based on Foata normal form. 0/1828 useless extension candidates. Maximal degree in co-relation 5160. Up to 2305 conditions per place. [2022-11-25 17:47:44,288 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2022-11-25 17:47:44,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 21 transitions, 100 flow [2022-11-25 17:47:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2022-11-25 17:47:44,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-11-25 17:47:44,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2022-11-25 17:47:44,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2022-11-25 17:47:44,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:44,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2022-11-25 17:47:44,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,292 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 66 flow. Second operand 3 states and 208 transitions. [2022-11-25 17:47:44,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 21 transitions, 100 flow [2022-11-25 17:47:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:44,295 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 65 flow [2022-11-25 17:47:44,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2022-11-25 17:47:44,295 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2022-11-25 17:47:44,295 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 65 flow [2022-11-25 17:47:44,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:44,296 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:47:44,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:47:44,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 587311532, now seen corresponding path program 1 times [2022-11-25 17:47:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:44,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690366707] [2022-11-25 17:47:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:44,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690366707] [2022-11-25 17:47:44,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690366707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:44,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:44,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603520828] [2022-11-25 17:47:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:44,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:44,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:44,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:44,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:44,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:44,693 INFO L130 PetriNetUnfolder]: 2300/3511 cut-off events. [2022-11-25 17:47:44,693 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2022-11-25 17:47:44,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 3511 events. 2300/3511 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20818 event pairs, 1224 based on Foata normal form. 0/2644 useless extension candidates. Maximal degree in co-relation 7221. Up to 2129 conditions per place. [2022-11-25 17:47:44,722 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2022-11-25 17:47:44,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 172 flow [2022-11-25 17:47:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-11-25 17:47:44,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2022-11-25 17:47:44,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-11-25 17:47:44,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-11-25 17:47:44,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:44,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-11-25 17:47:44,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,726 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 65 flow. Second operand 3 states and 210 transitions. [2022-11-25 17:47:44,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 172 flow [2022-11-25 17:47:44,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:44,728 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 102 flow [2022-11-25 17:47:44,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2022-11-25 17:47:44,728 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-11-25 17:47:44,728 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 102 flow [2022-11-25 17:47:44,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:44,734 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:44,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 17:47:44,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1563790715, now seen corresponding path program 1 times [2022-11-25 17:47:44,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:44,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114508457] [2022-11-25 17:47:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:44,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114508457] [2022-11-25 17:47:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114508457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:44,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:44,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958231879] [2022-11-25 17:47:44,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:44,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:44,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:44,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:44,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:44,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:45,253 INFO L130 PetriNetUnfolder]: 3060/4717 cut-off events. [2022-11-25 17:47:45,253 INFO L131 PetriNetUnfolder]: For 2755/2755 co-relation queries the response was YES. [2022-11-25 17:47:45,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12126 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30071 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 12114. Up to 2885 conditions per place. [2022-11-25 17:47:45,299 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2022-11-25 17:47:45,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 244 flow [2022-11-25 17:47:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2022-11-25 17:47:45,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4837962962962963 [2022-11-25 17:47:45,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2022-11-25 17:47:45,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2022-11-25 17:47:45,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:45,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2022-11-25 17:47:45,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,304 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 102 flow. Second operand 3 states and 209 transitions. [2022-11-25 17:47:45,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 244 flow [2022-11-25 17:47:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:45,318 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 160 flow [2022-11-25 17:47:45,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2022-11-25 17:47:45,320 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2022-11-25 17:47:45,320 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 160 flow [2022-11-25 17:47:45,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:45,321 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 17:47:45,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1234574469, now seen corresponding path program 1 times [2022-11-25 17:47:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300785597] [2022-11-25 17:47:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:45,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:45,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300785597] [2022-11-25 17:47:45,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300785597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:45,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:45,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003045094] [2022-11-25 17:47:45,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:45,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:45,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:45,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:45,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:45,798 INFO L130 PetriNetUnfolder]: 2474/3707 cut-off events. [2022-11-25 17:47:45,799 INFO L131 PetriNetUnfolder]: For 3413/3413 co-relation queries the response was YES. [2022-11-25 17:47:45,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11161 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 22758 event pairs, 472 based on Foata normal form. 0/3175 useless extension candidates. Maximal degree in co-relation 11148. Up to 3026 conditions per place. [2022-11-25 17:47:45,832 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-11-25 17:47:45,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 323 flow [2022-11-25 17:47:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2022-11-25 17:47:45,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-11-25 17:47:45,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2022-11-25 17:47:45,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2022-11-25 17:47:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:45,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2022-11-25 17:47:45,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,837 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 160 flow. Second operand 3 states and 208 transitions. [2022-11-25 17:47:45,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 323 flow [2022-11-25 17:47:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:45,886 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 144 flow [2022-11-25 17:47:45,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2022-11-25 17:47:45,887 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2022-11-25 17:47:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 144 flow [2022-11-25 17:47:45,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:45,888 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:45,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 17:47:45,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1232874439, now seen corresponding path program 1 times [2022-11-25 17:47:45,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796230778] [2022-11-25 17:47:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:45,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796230778] [2022-11-25 17:47:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796230778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:45,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:45,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111200708] [2022-11-25 17:47:45,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:45,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:45,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:45,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:45,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:46,282 INFO L130 PetriNetUnfolder]: 1993/3029 cut-off events. [2022-11-25 17:47:46,282 INFO L131 PetriNetUnfolder]: For 2304/2304 co-relation queries the response was YES. [2022-11-25 17:47:46,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18277 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 8815. Up to 2450 conditions per place. [2022-11-25 17:47:46,308 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-25 17:47:46,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 284 flow [2022-11-25 17:47:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2022-11-25 17:47:46,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2022-11-25 17:47:46,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 205 transitions. [2022-11-25 17:47:46,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 205 transitions. [2022-11-25 17:47:46,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:46,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 205 transitions. [2022-11-25 17:47:46,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,313 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 144 flow. Second operand 3 states and 205 transitions. [2022-11-25 17:47:46,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 284 flow [2022-11-25 17:47:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:46,315 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 142 flow [2022-11-25 17:47:46,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2022-11-25 17:47:46,316 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2022-11-25 17:47:46,316 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 142 flow [2022-11-25 17:47:46,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:46,317 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:46,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 17:47:46,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -840748666, now seen corresponding path program 1 times [2022-11-25 17:47:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:46,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114001292] [2022-11-25 17:47:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:47:46,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:46,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114001292] [2022-11-25 17:47:46,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114001292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:46,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:46,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:46,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357762897] [2022-11-25 17:47:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:46,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:46,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:46,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:46,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:46,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:46,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:46,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:46,826 INFO L130 PetriNetUnfolder]: 2430/3913 cut-off events. [2022-11-25 17:47:46,826 INFO L131 PetriNetUnfolder]: For 3547/3547 co-relation queries the response was YES. [2022-11-25 17:47:46,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11285 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 25966 event pairs, 988 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 11272. Up to 2459 conditions per place. [2022-11-25 17:47:46,862 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2022-11-25 17:47:46,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 313 flow [2022-11-25 17:47:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2022-11-25 17:47:46,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2022-11-25 17:47:46,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2022-11-25 17:47:46,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2022-11-25 17:47:46,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:46,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2022-11-25 17:47:46,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,866 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 142 flow. Second operand 3 states and 204 transitions. [2022-11-25 17:47:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 313 flow [2022-11-25 17:47:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:46,874 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 266 flow [2022-11-25 17:47:46,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2022-11-25 17:47:46,875 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2022-11-25 17:47:46,875 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 266 flow [2022-11-25 17:47:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:46,876 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:46,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 17:47:46,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash -293401409, now seen corresponding path program 1 times [2022-11-25 17:47:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:46,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533966461] [2022-11-25 17:47:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:47:46,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533966461] [2022-11-25 17:47:46,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533966461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:46,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:46,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:46,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172921620] [2022-11-25 17:47:46,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:46,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:46,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:46,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:46,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:46,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:46,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:47,348 INFO L130 PetriNetUnfolder]: 1955/3099 cut-off events. [2022-11-25 17:47:47,348 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2022-11-25 17:47:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11105 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19793 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 11091. Up to 2442 conditions per place. [2022-11-25 17:47:47,378 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2022-11-25 17:47:47,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 449 flow [2022-11-25 17:47:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-11-25 17:47:47,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2022-11-25 17:47:47,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-11-25 17:47:47,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-11-25 17:47:47,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:47,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-11-25 17:47:47,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,383 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 266 flow. Second operand 3 states and 202 transitions. [2022-11-25 17:47:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 449 flow [2022-11-25 17:47:47,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:47,390 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 244 flow [2022-11-25 17:47:47,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2022-11-25 17:47:47,391 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2022-11-25 17:47:47,391 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 244 flow [2022-11-25 17:47:47,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:47,392 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 17:47:47,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash 751455893, now seen corresponding path program 1 times [2022-11-25 17:47:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:47,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80616234] [2022-11-25 17:47:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:47:47,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80616234] [2022-11-25 17:47:47,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80616234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:47,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:47,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406414999] [2022-11-25 17:47:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:47,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:47,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:47,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:47,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:47,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:47,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:47,868 INFO L130 PetriNetUnfolder]: 2132/3676 cut-off events. [2022-11-25 17:47:47,868 INFO L131 PetriNetUnfolder]: For 5429/5429 co-relation queries the response was YES. [2022-11-25 17:47:47,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12141 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 25965 event pairs, 890 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 12127. Up to 2397 conditions per place. [2022-11-25 17:47:47,904 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2022-11-25 17:47:47,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 492 flow [2022-11-25 17:47:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-11-25 17:47:47,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2022-11-25 17:47:47,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-11-25 17:47:47,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-11-25 17:47:47,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:47,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-11-25 17:47:47,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,909 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 244 flow. Second operand 3 states and 201 transitions. [2022-11-25 17:47:47,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 492 flow [2022-11-25 17:47:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:47,914 INFO L231 Difference]: Finished difference. Result has 42 places, 50 transitions, 462 flow [2022-11-25 17:47:47,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=42, PETRI_TRANSITIONS=50} [2022-11-25 17:47:47,915 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2022-11-25 17:47:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 50 transitions, 462 flow [2022-11-25 17:47:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:47,915 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 17:47:47,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1820299302, now seen corresponding path program 1 times [2022-11-25 17:47:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277703539] [2022-11-25 17:47:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:47:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:47,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277703539] [2022-11-25 17:47:47,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277703539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:47,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:47,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525898302] [2022-11-25 17:47:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:47,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:47,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2022-11-25 17:47:47,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 50 transitions, 462 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:47,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2022-11-25 17:47:47,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:48,420 INFO L130 PetriNetUnfolder]: 1771/3145 cut-off events. [2022-11-25 17:47:48,420 INFO L131 PetriNetUnfolder]: For 7685/7685 co-relation queries the response was YES. [2022-11-25 17:47:48,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22289 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 12197. Up to 1944 conditions per place. [2022-11-25 17:47:48,449 INFO L137 encePairwiseOnDemand]: 142/144 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2022-11-25 17:47:48,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 707 flow [2022-11-25 17:47:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-11-25 17:47:48,451 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2022-11-25 17:47:48,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-11-25 17:47:48,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-11-25 17:47:48,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:48,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-11-25 17:47:48,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:48,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:48,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:48,454 INFO L175 Difference]: Start difference. First operand has 42 places, 50 transitions, 462 flow. Second operand 3 states and 199 transitions. [2022-11-25 17:47:48,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 707 flow [2022-11-25 17:47:48,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 665 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:48,465 INFO L231 Difference]: Finished difference. Result has 41 places, 49 transitions, 432 flow [2022-11-25 17:47:48,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=41, PETRI_TRANSITIONS=49} [2022-11-25 17:47:48,466 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-11-25 17:47:48,466 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 49 transitions, 432 flow [2022-11-25 17:47:48,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:48,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:48,467 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 17:47:48,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 17:47:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 591410128, now seen corresponding path program 1 times [2022-11-25 17:47:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720395418] [2022-11-25 17:47:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:48,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:48,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:48,504 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:48,504 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-25 17:47:48,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-11-25 17:47:48,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-11-25 17:47:48,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-25 17:47:48,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 17:47:48,506 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:48,507 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:48,507 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 17:47:48,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:47:48,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,551 INFO L130 PetriNetUnfolder]: 6/180 cut-off events. [2022-11-25 17:47:48,551 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:47:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 180 events. 6/180 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 422 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 164. Up to 12 conditions per place. [2022-11-25 17:47:48,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,554 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:48,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 92 transitions, 229 flow [2022-11-25 17:47:48,571 INFO L130 PetriNetUnfolder]: 6/180 cut-off events. [2022-11-25 17:47:48,572 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:47:48,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 180 events. 6/180 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 422 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 164. Up to 12 conditions per place. [2022-11-25 17:47:48,576 INFO L119 LiptonReduction]: Number of co-enabled transitions 4100 [2022-11-25 17:47:50,454 INFO L134 LiptonReduction]: Checked pairs total: 6772 [2022-11-25 17:47:50,454 INFO L136 LiptonReduction]: Total number of compositions: 70 [2022-11-25 17:47:50,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:50,456 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:50,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-25 17:47:50,458 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:47:50,458 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:50,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:50,458 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:50,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:47:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 25231, now seen corresponding path program 1 times [2022-11-25 17:47:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745259793] [2022-11-25 17:47:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745259793] [2022-11-25 17:47:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745259793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:50,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483870706] [2022-11-25 17:47:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:50,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:50,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 162 [2022-11-25 17:47:50,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:50,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 162 [2022-11-25 17:47:50,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:52,291 INFO L130 PetriNetUnfolder]: 13314/18347 cut-off events. [2022-11-25 17:47:52,291 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2022-11-25 17:47:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38977 conditions, 18347 events. 13314/18347 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 107752 event pairs, 13314 based on Foata normal form. 0/11862 useless extension candidates. Maximal degree in co-relation 8207. Up to 17409 conditions per place. [2022-11-25 17:47:52,418 INFO L137 encePairwiseOnDemand]: 158/162 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 17:47:52,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 143 flow [2022-11-25 17:47:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-11-25 17:47:52,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49176954732510286 [2022-11-25 17:47:52,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-11-25 17:47:52,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-11-25 17:47:52,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:52,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-11-25 17:47:52,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,423 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 103 flow. Second operand 3 states and 239 transitions. [2022-11-25 17:47:52,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 143 flow [2022-11-25 17:47:52,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 26 transitions, 123 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:52,433 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 79 flow [2022-11-25 17:47:52,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2022-11-25 17:47:52,438 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2022-11-25 17:47:52,439 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 79 flow [2022-11-25 17:47:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:52,439 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:52,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 17:47:52,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:47:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash 25233, now seen corresponding path program 1 times [2022-11-25 17:47:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048006742] [2022-11-25 17:47:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:52,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048006742] [2022-11-25 17:47:52,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048006742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:52,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:52,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:52,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12265928] [2022-11-25 17:47:52,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:52,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:52,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 162 [2022-11-25 17:47:52,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:52,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 162 [2022-11-25 17:47:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:53,719 INFO L130 PetriNetUnfolder]: 8535/12203 cut-off events. [2022-11-25 17:47:53,719 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2022-11-25 17:47:53,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24755 conditions, 12203 events. 8535/12203 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 71028 event pairs, 8535 based on Foata normal form. 0/8676 useless extension candidates. Maximal degree in co-relation 24744. Up to 11265 conditions per place. [2022-11-25 17:47:53,835 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 21 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-11-25 17:47:53,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 121 flow [2022-11-25 17:47:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2022-11-25 17:47:53,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2022-11-25 17:47:53,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2022-11-25 17:47:53,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2022-11-25 17:47:53,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:53,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2022-11-25 17:47:53,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,840 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 79 flow. Second operand 3 states and 230 transitions. [2022-11-25 17:47:53,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 121 flow [2022-11-25 17:47:53,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 25 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:53,842 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 78 flow [2022-11-25 17:47:53,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2022-11-25 17:47:53,843 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2022-11-25 17:47:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 78 flow [2022-11-25 17:47:53,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:53,843 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:47:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 17:47:53,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:47:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 752368821, now seen corresponding path program 1 times [2022-11-25 17:47:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619487854] [2022-11-25 17:47:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619487854] [2022-11-25 17:47:53,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619487854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:53,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:53,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066155377] [2022-11-25 17:47:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:53,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:47:53,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:53,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:47:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:55,313 INFO L130 PetriNetUnfolder]: 12384/17359 cut-off events. [2022-11-25 17:47:55,313 INFO L131 PetriNetUnfolder]: For 1342/1342 co-relation queries the response was YES. [2022-11-25 17:47:55,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35566 conditions, 17359 events. 12384/17359 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107355 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 35554. Up to 11057 conditions per place. [2022-11-25 17:47:55,559 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2022-11-25 17:47:55,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 214 flow [2022-11-25 17:47:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:55,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-11-25 17:47:55,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49176954732510286 [2022-11-25 17:47:55,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-11-25 17:47:55,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-11-25 17:47:55,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:55,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-11-25 17:47:55,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,564 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 78 flow. Second operand 3 states and 239 transitions. [2022-11-25 17:47:55,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 214 flow [2022-11-25 17:47:55,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:55,566 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 123 flow [2022-11-25 17:47:55,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-11-25 17:47:55,567 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2022-11-25 17:47:55,567 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 123 flow [2022-11-25 17:47:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:55,568 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:55,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 17:47:55,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:47:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2072314995, now seen corresponding path program 1 times [2022-11-25 17:47:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230138915] [2022-11-25 17:47:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:55,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:55,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230138915] [2022-11-25 17:47:55,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230138915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:55,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:55,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347928385] [2022-11-25 17:47:55,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:55,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:55,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:55,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:47:55,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:55,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:47:55,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:57,816 INFO L130 PetriNetUnfolder]: 17214/24347 cut-off events. [2022-11-25 17:47:57,816 INFO L131 PetriNetUnfolder]: For 13763/13763 co-relation queries the response was YES. [2022-11-25 17:47:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62072 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 162264 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 62059. Up to 15695 conditions per place. [2022-11-25 17:47:58,167 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2022-11-25 17:47:58,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 306 flow [2022-11-25 17:47:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-25 17:47:58,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4897119341563786 [2022-11-25 17:47:58,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-25 17:47:58,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-25 17:47:58,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:58,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-25 17:47:58,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:58,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:58,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:58,172 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 123 flow. Second operand 3 states and 238 transitions. [2022-11-25 17:47:58,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 306 flow [2022-11-25 17:47:58,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:58,373 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 199 flow [2022-11-25 17:47:58,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2022-11-25 17:47:58,374 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2022-11-25 17:47:58,374 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 199 flow [2022-11-25 17:47:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:58,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:58,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:58,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 17:47:58,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:47:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 184712009, now seen corresponding path program 1 times [2022-11-25 17:47:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321734909] [2022-11-25 17:47:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:58,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:58,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321734909] [2022-11-25 17:47:58,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321734909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:58,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:58,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410009764] [2022-11-25 17:47:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:58,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:47:58,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:58,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:58,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:47:58,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:59,983 INFO L130 PetriNetUnfolder]: 13946/19127 cut-off events. [2022-11-25 17:47:59,983 INFO L131 PetriNetUnfolder]: For 17220/17220 co-relation queries the response was YES. [2022-11-25 17:48:00,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56977 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 120918 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56963. Up to 15496 conditions per place. [2022-11-25 17:48:00,141 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 17:48:00,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 411 flow [2022-11-25 17:48:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2022-11-25 17:48:00,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2022-11-25 17:48:00,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2022-11-25 17:48:00,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2022-11-25 17:48:00,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:00,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2022-11-25 17:48:00,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:00,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:00,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:00,152 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 199 flow. Second operand 3 states and 237 transitions. [2022-11-25 17:48:00,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 411 flow [2022-11-25 17:48:00,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:48:00,315 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 179 flow [2022-11-25 17:48:00,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2022-11-25 17:48:00,316 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-11-25 17:48:00,316 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 179 flow [2022-11-25 17:48:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:00,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:00,316 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:00,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-25 17:48:00,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:00,317 INFO L85 PathProgramCache]: Analyzing trace with hash 182748769, now seen corresponding path program 1 times [2022-11-25 17:48:00,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:00,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351236057] [2022-11-25 17:48:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:00,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:48:00,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:00,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351236057] [2022-11-25 17:48:00,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351236057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:00,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:00,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:48:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285725056] [2022-11-25 17:48:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:48:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:48:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:48:00,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:00,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:00,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:00,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:00,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:01,774 INFO L130 PetriNetUnfolder]: 11269/15577 cut-off events. [2022-11-25 17:48:01,774 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2022-11-25 17:48:01,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44881 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96496 event pairs, 1895 based on Foata normal form. 0/12791 useless extension candidates. Maximal degree in co-relation 44867. Up to 12576 conditions per place. [2022-11-25 17:48:01,873 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-25 17:48:01,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 366 flow [2022-11-25 17:48:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2022-11-25 17:48:01,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-11-25 17:48:01,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2022-11-25 17:48:01,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2022-11-25 17:48:01,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:01,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2022-11-25 17:48:01,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,879 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 179 flow. Second operand 3 states and 234 transitions. [2022-11-25 17:48:01,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 366 flow [2022-11-25 17:48:01,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:48:01,884 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 177 flow [2022-11-25 17:48:01,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2022-11-25 17:48:01,884 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-11-25 17:48:01,884 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 177 flow [2022-11-25 17:48:01,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:01,885 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 17:48:01,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1038219332, now seen corresponding path program 1 times [2022-11-25 17:48:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:01,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597598596] [2022-11-25 17:48:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:01,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:48:01,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597598596] [2022-11-25 17:48:01,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597598596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:01,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:01,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:48:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56959796] [2022-11-25 17:48:01,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:48:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:48:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:48:01,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:01,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:01,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:03,490 INFO L130 PetriNetUnfolder]: 14850/21601 cut-off events. [2022-11-25 17:48:03,490 INFO L131 PetriNetUnfolder]: For 20184/20184 co-relation queries the response was YES. [2022-11-25 17:48:03,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61591 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 150162 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 61577. Up to 14235 conditions per place. [2022-11-25 17:48:03,682 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2022-11-25 17:48:03,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 411 flow [2022-11-25 17:48:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-11-25 17:48:03,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4794238683127572 [2022-11-25 17:48:03,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-11-25 17:48:03,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-11-25 17:48:03,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:03,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-11-25 17:48:03,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:03,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:03,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:03,688 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 177 flow. Second operand 3 states and 233 transitions. [2022-11-25 17:48:03,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 411 flow [2022-11-25 17:48:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:48:03,697 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 349 flow [2022-11-25 17:48:03,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2022-11-25 17:48:03,698 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2022-11-25 17:48:03,698 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 349 flow [2022-11-25 17:48:03,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:03,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:03,698 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:03,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-25 17:48:03,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2120024739, now seen corresponding path program 1 times [2022-11-25 17:48:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:03,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315049764] [2022-11-25 17:48:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:48:03,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315049764] [2022-11-25 17:48:03,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315049764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:03,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:03,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:48:03,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269644196] [2022-11-25 17:48:03,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:03,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:48:03,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:48:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:48:03,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:03,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:03,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:03,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:03,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:05,427 INFO L130 PetriNetUnfolder]: 11925/16849 cut-off events. [2022-11-25 17:48:05,428 INFO L131 PetriNetUnfolder]: For 28615/28615 co-relation queries the response was YES. [2022-11-25 17:48:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59536 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110547 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 59521. Up to 13484 conditions per place. [2022-11-25 17:48:05,581 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2022-11-25 17:48:05,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 621 flow [2022-11-25 17:48:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-11-25 17:48:05,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2022-11-25 17:48:05,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-11-25 17:48:05,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-11-25 17:48:05,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:05,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-11-25 17:48:05,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:05,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:05,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:05,587 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 349 flow. Second operand 3 states and 231 transitions. [2022-11-25 17:48:05,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 621 flow [2022-11-25 17:48:05,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 587 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:48:05,670 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 319 flow [2022-11-25 17:48:05,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2022-11-25 17:48:05,671 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2022-11-25 17:48:05,671 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 319 flow [2022-11-25 17:48:05,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:05,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:05,671 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:05,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-25 17:48:05,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash 407852683, now seen corresponding path program 1 times [2022-11-25 17:48:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:05,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326369389] [2022-11-25 17:48:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:05,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:48:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326369389] [2022-11-25 17:48:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326369389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:05,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:05,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:48:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857900619] [2022-11-25 17:48:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:48:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:48:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:48:05,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:05,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:05,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:05,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:05,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:07,884 INFO L130 PetriNetUnfolder]: 14852/22111 cut-off events. [2022-11-25 17:48:07,884 INFO L131 PetriNetUnfolder]: For 37417/37417 co-relation queries the response was YES. [2022-11-25 17:48:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72699 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 161187 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 72684. Up to 14769 conditions per place. [2022-11-25 17:48:08,022 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2022-11-25 17:48:08,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 686 flow [2022-11-25 17:48:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2022-11-25 17:48:08,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2022-11-25 17:48:08,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2022-11-25 17:48:08,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2022-11-25 17:48:08,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:08,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2022-11-25 17:48:08,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:08,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:08,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:08,026 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 319 flow. Second operand 3 states and 230 transitions. [2022-11-25 17:48:08,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 686 flow [2022-11-25 17:48:08,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:48:08,041 INFO L231 Difference]: Finished difference. Result has 48 places, 69 transitions, 649 flow [2022-11-25 17:48:08,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=649, PETRI_PLACES=48, PETRI_TRANSITIONS=69} [2022-11-25 17:48:08,042 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2022-11-25 17:48:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 69 transitions, 649 flow [2022-11-25 17:48:08,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:08,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:08,043 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:08,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-25 17:48:08,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash -241465534, now seen corresponding path program 1 times [2022-11-25 17:48:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736213555] [2022-11-25 17:48:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:48:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:08,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736213555] [2022-11-25 17:48:08,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736213555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:08,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:08,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:48:08,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445506710] [2022-11-25 17:48:08,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:48:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:48:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:48:08,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:08,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 69 transitions, 649 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:08,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:08,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:09,735 INFO L130 PetriNetUnfolder]: 11939/17421 cut-off events. [2022-11-25 17:48:09,735 INFO L131 PetriNetUnfolder]: For 46459/46459 co-relation queries the response was YES. [2022-11-25 17:48:09,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69795 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121423 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 69779. Up to 13486 conditions per place. [2022-11-25 17:48:09,895 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2022-11-25 17:48:09,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 97 transitions, 1072 flow [2022-11-25 17:48:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2022-11-25 17:48:09,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2022-11-25 17:48:09,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2022-11-25 17:48:09,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2022-11-25 17:48:09,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:09,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2022-11-25 17:48:09,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:09,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:09,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:09,900 INFO L175 Difference]: Start difference. First operand has 48 places, 69 transitions, 649 flow. Second operand 3 states and 228 transitions. [2022-11-25 17:48:09,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 97 transitions, 1072 flow [2022-11-25 17:48:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 97 transitions, 1014 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:48:09,981 INFO L231 Difference]: Finished difference. Result has 47 places, 68 transitions, 603 flow [2022-11-25 17:48:09,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=603, PETRI_PLACES=47, PETRI_TRANSITIONS=68} [2022-11-25 17:48:09,982 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2022-11-25 17:48:09,982 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 68 transitions, 603 flow [2022-11-25 17:48:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:09,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:09,983 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-25 17:48:09,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1255481654, now seen corresponding path program 1 times [2022-11-25 17:48:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626117128] [2022-11-25 17:48:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 17:48:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:10,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626117128] [2022-11-25 17:48:10,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626117128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:10,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:10,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:48:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301389001] [2022-11-25 17:48:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:10,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:48:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:48:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:48:10,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:10,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 68 transitions, 603 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:10,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:10,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:10,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:12,011 INFO L130 PetriNetUnfolder]: 13634/21204 cut-off events. [2022-11-25 17:48:12,011 INFO L131 PetriNetUnfolder]: For 53657/53657 co-relation queries the response was YES. [2022-11-25 17:48:12,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79177 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163964 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 79161. Up to 14771 conditions per place. [2022-11-25 17:48:12,156 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2022-11-25 17:48:12,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 110 transitions, 1213 flow [2022-11-25 17:48:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2022-11-25 17:48:12,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4670781893004115 [2022-11-25 17:48:12,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2022-11-25 17:48:12,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2022-11-25 17:48:12,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:12,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2022-11-25 17:48:12,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:12,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:12,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:12,161 INFO L175 Difference]: Start difference. First operand has 47 places, 68 transitions, 603 flow. Second operand 3 states and 227 transitions. [2022-11-25 17:48:12,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 110 transitions, 1213 flow [2022-11-25 17:48:12,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 110 transitions, 1197 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:48:12,190 INFO L231 Difference]: Finished difference. Result has 50 places, 101 transitions, 1213 flow [2022-11-25 17:48:12,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1213, PETRI_PLACES=50, PETRI_TRANSITIONS=101} [2022-11-25 17:48:12,191 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2022-11-25 17:48:12,191 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 101 transitions, 1213 flow [2022-11-25 17:48:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:12,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:12,192 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:12,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-25 17:48:12,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:12,192 INFO L85 PathProgramCache]: Analyzing trace with hash 265228491, now seen corresponding path program 1 times [2022-11-25 17:48:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643241662] [2022-11-25 17:48:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:12,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 17:48:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643241662] [2022-11-25 17:48:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643241662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:12,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:12,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:48:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741108688] [2022-11-25 17:48:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:48:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:48:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:48:12,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 162 [2022-11-25 17:48:12,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 101 transitions, 1213 flow. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:12,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:12,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 162 [2022-11-25 17:48:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:13,857 INFO L130 PetriNetUnfolder]: 11331/18039 cut-off events. [2022-11-25 17:48:13,857 INFO L131 PetriNetUnfolder]: For 68413/68413 co-relation queries the response was YES. [2022-11-25 17:48:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77882 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 141489 event pairs, 3585 based on Foata normal form. 862/18860 useless extension candidates. Maximal degree in co-relation 77865. Up to 10940 conditions per place. [2022-11-25 17:48:13,983 INFO L137 encePairwiseOnDemand]: 160/162 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2022-11-25 17:48:13,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 137 transitions, 1875 flow [2022-11-25 17:48:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:48:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:48:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2022-11-25 17:48:13,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 17:48:13,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2022-11-25 17:48:13,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2022-11-25 17:48:13,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:13,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2022-11-25 17:48:13,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:13,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:13,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:13,986 INFO L175 Difference]: Start difference. First operand has 50 places, 101 transitions, 1213 flow. Second operand 3 states and 225 transitions. [2022-11-25 17:48:13,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 137 transitions, 1875 flow [2022-11-25 17:48:14,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 137 transitions, 1777 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:48:14,134 INFO L231 Difference]: Finished difference. Result has 49 places, 100 transitions, 1143 flow [2022-11-25 17:48:14,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1143, PETRI_PLACES=49, PETRI_TRANSITIONS=100} [2022-11-25 17:48:14,135 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2022-11-25 17:48:14,135 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 100 transitions, 1143 flow [2022-11-25 17:48:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:14,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:14,136 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:14,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-25 17:48:14,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 17:48:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -371637988, now seen corresponding path program 1 times [2022-11-25 17:48:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534512715] [2022-11-25 17:48:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:48:14,148 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:48:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:48:14,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:48:14,171 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:48:14,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-25 17:48:14,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2022-11-25 17:48:14,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2022-11-25 17:48:14,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-25 17:48:14,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-11-25 17:48:14,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-11-25 17:48:14,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-11-25 17:48:14,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-11-25 17:48:14,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-25 17:48:14,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-25 17:48:14,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-25 17:48:14,174 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:14,174 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:48:14,174 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-25 17:48:14,192 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:48:14,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,216 INFO L130 PetriNetUnfolder]: 7/209 cut-off events. [2022-11-25 17:48:14,216 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:48:14,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 7/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 540 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2022-11-25 17:48:14,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,219 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:48:14,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2022-11-25 17:48:14,235 INFO L130 PetriNetUnfolder]: 7/209 cut-off events. [2022-11-25 17:48:14,235 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:48:14,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 7/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 540 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2022-11-25 17:48:14,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 5580 [2022-11-25 17:48:16,193 INFO L134 LiptonReduction]: Checked pairs total: 8508 [2022-11-25 17:48:16,193 INFO L136 LiptonReduction]: Total number of compositions: 77 [2022-11-25 17:48:16,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:48:16,195 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73aff48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:48:16,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-25 17:48:16,196 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:48:16,196 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:48:16,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:16,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:48:16,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:48:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash 31347, now seen corresponding path program 1 times [2022-11-25 17:48:16,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:16,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491708328] [2022-11-25 17:48:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:16,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:48:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491708328] [2022-11-25 17:48:16,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491708328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:48:16,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:48:16,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:48:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058158272] [2022-11-25 17:48:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:48:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:48:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:48:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:48:16,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 180 [2022-11-25 17:48:16,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 126 flow. Second operand has 2 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:16,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:48:16,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 180 [2022-11-25 17:48:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand