./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:03,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:03,848 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:23:03,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:03,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:03,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:03,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:03,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:03,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:03,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:03,916 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:03,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:03,917 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:03,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:03,919 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:03,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:03,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:03,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:03,921 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:23:03,922 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:23:03,922 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:23:03,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:03,923 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:23:03,924 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:23:03,924 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:03,925 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:03,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:03,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:03,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:03,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:03,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:03,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:03,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:03,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:03,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:03,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:03,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:03,930 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:03,930 INFO L153 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_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2023-11-12 02:23:04,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:04,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:04,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:04,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:04,332 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:04,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-12 02:23:07,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:23:07,588 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:23:07,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-12 02:23:07,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/data/ce54bef3d/e204012ab8e5470590bb41f961584396/FLAGca1bd7edc [2023-11-12 02:23:07,610 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/data/ce54bef3d/e204012ab8e5470590bb41f961584396 [2023-11-12 02:23:07,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:23:07,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:23:07,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:07,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:23:07,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:23:07,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2546baff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07, skipping insertion in model container [2023-11-12 02:23:07,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,647 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:23:07,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:07,843 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:23:07,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:23:07,903 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:23:07,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07 WrapperNode [2023-11-12 02:23:07,904 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:23:07,905 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:07,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:23:07,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:23:07,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:07,959 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 59 [2023-11-12 02:23:07,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:23:07,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:23:07,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:23:07,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:23:08,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,041 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:23:08,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:23:08,070 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:23:08,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:23:08,071 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (1/1) ... [2023-11-12 02:23:08,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:08,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:08,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:23:08,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:23:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:23:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:23:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:23:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:23:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:23:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:23:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:23:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:23:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:23:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:23:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:23:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:23:08,148 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:23:08,251 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:23:08,253 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:23:08,466 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:23:08,474 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:23:08,475 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:23:08,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:08 BoogieIcfgContainer [2023-11-12 02:23:08,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:23:08,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:23:08,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:23:08,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:23:08,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:23:07" (1/3) ... [2023-11-12 02:23:08,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaee44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:08, skipping insertion in model container [2023-11-12 02:23:08,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:23:07" (2/3) ... [2023-11-12 02:23:08,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaee44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:23:08, skipping insertion in model container [2023-11-12 02:23:08,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:23:08" (3/3) ... [2023-11-12 02:23:08,486 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-12 02:23:08,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:23:08,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 02:23:08,507 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:23:08,575 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:23:08,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 212 flow [2023-11-12 02:23:08,696 INFO L124 PetriNetUnfolderBase]: 6/97 cut-off events. [2023-11-12 02:23:08,696 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:23:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-12 02:23:08,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 212 flow [2023-11-12 02:23:08,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 196 flow [2023-11-12 02:23:08,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:23:08,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 196 flow [2023-11-12 02:23:08,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 196 flow [2023-11-12 02:23:08,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 196 flow [2023-11-12 02:23:08,766 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-11-12 02:23:08,766 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:23:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-12 02:23:08,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 576 [2023-11-12 02:23:12,160 INFO L134 LiptonReduction]: Checked pairs total: 626 [2023-11-12 02:23:12,161 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-11-12 02:23:12,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:23:12,184 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;@2c50da96, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:23:12,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-12 02:23:12,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:23:12,186 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:23:12,186 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:23:12,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:12,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:23:12,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:12,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 369, now seen corresponding path program 1 times [2023-11-12 02:23:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:12,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602569497] [2023-11-12 02:23:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:12,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:12,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602569497] [2023-11-12 02:23:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602569497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:23:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593875378] [2023-11-12 02:23:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:23:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:23:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:23:12,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 193 [2023-11-12 02:23:12,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 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) [2023-11-12 02:23:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 193 [2023-11-12 02:23:12,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:12,418 INFO L124 PetriNetUnfolderBase]: 106/169 cut-off events. [2023-11-12 02:23:12,419 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:23:12,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 539 event pairs, 45 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-11-12 02:23:12,423 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-12 02:23:12,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-12 02:23:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:23:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:23:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2023-11-12 02:23:12,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233160621761658 [2023-11-12 02:23:12,439 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2023-11-12 02:23:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2023-11-12 02:23:12,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:12,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2023-11-12 02:23:12,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 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) [2023-11-12 02:23:12,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,454 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,456 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 202 transitions. [2023-11-12 02:23:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-12 02:23:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:12,461 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-12 02:23:12,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-12 02:23:12,467 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:23:12,467 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-12 02:23:12,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 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) [2023-11-12 02:23:12,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:12,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:23:12,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:23:12,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:12,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash 360569, now seen corresponding path program 1 times [2023-11-12 02:23:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429501076] [2023-11-12 02:23:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:12,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:12,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429501076] [2023-11-12 02:23:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429501076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:12,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:12,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:23:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683118287] [2023-11-12 02:23:12,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:12,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 193 [2023-11-12 02:23:12,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:12,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 193 [2023-11-12 02:23:12,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:12,888 INFO L124 PetriNetUnfolderBase]: 99/156 cut-off events. [2023-11-12 02:23:12,888 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:23:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 485 event pairs, 42 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-11-12 02:23:12,894 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-12 02:23:12,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-12 02:23:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-11-12 02:23:12,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680483592400691 [2023-11-12 02:23:12,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-11-12 02:23:12,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-11-12 02:23:12,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:12,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-11-12 02:23:12,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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) [2023-11-12 02:23:12,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,914 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 271 transitions. [2023-11-12 02:23:12,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-12 02:23:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:23:12,916 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-12 02:23:12,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-12 02:23:12,918 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:23:12,920 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-12 02:23:12,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:12,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:12,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:23:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:23:12,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:12,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash 360570, now seen corresponding path program 1 times [2023-11-12 02:23:12,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:12,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596275734] [2023-11-12 02:23:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:12,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596275734] [2023-11-12 02:23:13,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596275734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:13,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:13,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:23:13,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747510352] [2023-11-12 02:23:13,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:13,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:13,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2023-11-12 02:23:13,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:13,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:13,134 INFO L124 PetriNetUnfolderBase]: 92/143 cut-off events. [2023-11-12 02:23:13,134 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:23:13,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 433 event pairs, 39 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-11-12 02:23:13,136 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-12 02:23:13,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-12 02:23:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-12 02:23:13,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438687392055268 [2023-11-12 02:23:13,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-12 02:23:13,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-12 02:23:13,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:13,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-12 02:23:13,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,144 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 257 transitions. [2023-11-12 02:23:13,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-12 02:23:13,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:13,146 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-12 02:23:13,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-12 02:23:13,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:23:13,147 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-12 02:23:13,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2023-11-12 02:23:13,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:13,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:23:13,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:23:13,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:13,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash 346516540, now seen corresponding path program 1 times [2023-11-12 02:23:13,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:13,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094811474] [2023-11-12 02:23:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:13,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094811474] [2023-11-12 02:23:13,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094811474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:13,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:13,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:13,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971821010] [2023-11-12 02:23:13,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2023-11-12 02:23:13,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2023-11-12 02:23:13,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:13,506 INFO L124 PetriNetUnfolderBase]: 70/112 cut-off events. [2023-11-12 02:23:13,506 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:23:13,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 296 event pairs, 29 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-11-12 02:23:13,508 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-12 02:23:13,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-12 02:23:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-11-12 02:23:13,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45077720207253885 [2023-11-12 02:23:13,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-11-12 02:23:13,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-11-12 02:23:13,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:13,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-11-12 02:23:13,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,515 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 261 transitions. [2023-11-12 02:23:13,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-12 02:23:13,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:13,516 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-12 02:23:13,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-12 02:23:13,517 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:23:13,517 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-12 02:23:13,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:13,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:23:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:23:13,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:13,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash 346516539, now seen corresponding path program 1 times [2023-11-12 02:23:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:13,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979694233] [2023-11-12 02:23:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:13,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979694233] [2023-11-12 02:23:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979694233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:13,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:23:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978988169] [2023-11-12 02:23:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:13,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 193 [2023-11-12 02:23:13,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:13,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 193 [2023-11-12 02:23:13,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:13,680 INFO L124 PetriNetUnfolderBase]: 48/81 cut-off events. [2023-11-12 02:23:13,680 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:23:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 187 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-11-12 02:23:13,681 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-12 02:23:13,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-12 02:23:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-11-12 02:23:13,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796200345423146 [2023-11-12 02:23:13,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-11-12 02:23:13,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-11-12 02:23:13,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:13,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-11-12 02:23:13,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,688 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 242 transitions. [2023-11-12 02:23:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-12 02:23:13,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:13,689 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-12 02:23:13,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-12 02:23:13,690 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:23:13,690 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-12 02:23:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:13,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:13,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:23:13,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:13,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1682707528, now seen corresponding path program 1 times [2023-11-12 02:23:13,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:13,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409919039] [2023-11-12 02:23:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409919039] [2023-11-12 02:23:13,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409919039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:13,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:13,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:23:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531503215] [2023-11-12 02:23:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:23:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:23:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:23:13,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 193 [2023-11-12 02:23:13,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:13,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 193 [2023-11-12 02:23:13,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:13,826 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-12 02:23:13,827 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:23:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-11-12 02:23:13,828 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-12 02:23:13,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-11-12 02:23:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:23:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:23:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-11-12 02:23:13,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47668393782383417 [2023-11-12 02:23:13,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-11-12 02:23:13,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-11-12 02:23:13,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:13,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-11-12 02:23:13,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,835 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 276 transitions. [2023-11-12 02:23:13,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-11-12 02:23:13,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:13,836 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-11-12 02:23:13,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-11-12 02:23:13,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-12 02:23:13,837 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-11-12 02:23:13,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:13,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:13,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:23:13,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:13,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 249749149, now seen corresponding path program 1 times [2023-11-12 02:23:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527111947] [2023-11-12 02:23:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:13,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527111947] [2023-11-12 02:23:13,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527111947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:13,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:13,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262495585] [2023-11-12 02:23:13,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:13,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:13,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:13,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:13,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:13,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:13,995 INFO L124 PetriNetUnfolderBase]: 59/107 cut-off events. [2023-11-12 02:23:13,995 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-12 02:23:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 107 events. 59/107 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 280 event pairs, 6 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 261. Up to 79 conditions per place. [2023-11-12 02:23:13,997 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 15 selfloop transitions, 3 changer transitions 10/30 dead transitions. [2023-11-12 02:23:13,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 143 flow [2023-11-12 02:23:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:23:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-11-12 02:23:13,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533678756476684 [2023-11-12 02:23:14,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-11-12 02:23:14,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-11-12 02:23:14,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:14,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-11-12 02:23:14,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,019 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 4 states and 350 transitions. [2023-11-12 02:23:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 143 flow [2023-11-12 02:23:14,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:14,025 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 67 flow [2023-11-12 02:23:14,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-12 02:23:14,026 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-12 02:23:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 67 flow [2023-11-12 02:23:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:14,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:23:14,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:14,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -621205119, now seen corresponding path program 2 times [2023-11-12 02:23:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:14,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766685906] [2023-11-12 02:23:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766685906] [2023-11-12 02:23:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766685906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177587590] [2023-11-12 02:23:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:14,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:14,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:14,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:23:14,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:14,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:23:14,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:14,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177587590] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-11-12 02:23:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309613927] [2023-11-12 02:23:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 193 [2023-11-12 02:23:14,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:14,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 193 [2023-11-12 02:23:14,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:14,597 INFO L124 PetriNetUnfolderBase]: 84/154 cut-off events. [2023-11-12 02:23:14,598 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-12 02:23:14,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 154 events. 84/154 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 439 event pairs, 6 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 433. Up to 58 conditions per place. [2023-11-12 02:23:14,600 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 28 selfloop transitions, 9 changer transitions 4/43 dead transitions. [2023-11-12 02:23:14,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 232 flow [2023-11-12 02:23:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:23:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:23:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-11-12 02:23:14,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46217616580310883 [2023-11-12 02:23:14,603 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-11-12 02:23:14,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-11-12 02:23:14,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:14,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-11-12 02:23:14,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,608 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 67 flow. Second operand 5 states and 446 transitions. [2023-11-12 02:23:14,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 232 flow [2023-11-12 02:23:14,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 220 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:14,612 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 131 flow [2023-11-12 02:23:14,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-12 02:23:14,615 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-12 02:23:14,616 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 131 flow [2023-11-12 02:23:14,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:14,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:14,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:14,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:14,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:14,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1128896115, now seen corresponding path program 1 times [2023-11-12 02:23:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:14,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047929502] [2023-11-12 02:23:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:14,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:14,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047929502] [2023-11-12 02:23:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047929502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:14,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600625927] [2023-11-12 02:23:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:14,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:14,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:14,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:23:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:14,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:23:14,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:15,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600625927] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:15,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:15,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-12 02:23:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614388013] [2023-11-12 02:23:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:15,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:15,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:15,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:15,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:15,216 INFO L124 PetriNetUnfolderBase]: 78/156 cut-off events. [2023-11-12 02:23:15,216 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-12 02:23:15,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 156 events. 78/156 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 495 event pairs, 7 based on Foata normal form. 8/163 useless extension candidates. Maximal degree in co-relation 593. Up to 94 conditions per place. [2023-11-12 02:23:15,219 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 26 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-11-12 02:23:15,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 274 flow [2023-11-12 02:23:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:23:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-11-12 02:23:15,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45077720207253885 [2023-11-12 02:23:15,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-11-12 02:23:15,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-11-12 02:23:15,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:15,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-11-12 02:23:15,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,225 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 131 flow. Second operand 4 states and 348 transitions. [2023-11-12 02:23:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 274 flow [2023-11-12 02:23:15,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 268 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-12 02:23:15,230 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 186 flow [2023-11-12 02:23:15,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-11-12 02:23:15,231 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-12 02:23:15,231 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 186 flow [2023-11-12 02:23:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:15,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:15,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:15,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:15,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:15,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash 154721656, now seen corresponding path program 1 times [2023-11-12 02:23:15,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:15,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065740282] [2023-11-12 02:23:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:15,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:15,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065740282] [2023-11-12 02:23:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065740282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:15,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804568990] [2023-11-12 02:23:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:15,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:15,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:15,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:15,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:23:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:15,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:23:15,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:15,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:15,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804568990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:15,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 7 [2023-11-12 02:23:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410734854] [2023-11-12 02:23:15,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:15,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:23:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:23:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:23:15,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:15,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 83.55555555555556) internal successors, (752), 9 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:15,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:15,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:15,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:16,012 INFO L124 PetriNetUnfolderBase]: 147/295 cut-off events. [2023-11-12 02:23:16,012 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2023-11-12 02:23:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 295 events. 147/295 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1177 event pairs, 12 based on Foata normal form. 26/320 useless extension candidates. Maximal degree in co-relation 1241. Up to 138 conditions per place. [2023-11-12 02:23:16,016 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 50 selfloop transitions, 18 changer transitions 1/71 dead transitions. [2023-11-12 02:23:16,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 71 transitions, 570 flow [2023-11-12 02:23:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:23:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:23:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2023-11-12 02:23:16,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544781643227239 [2023-11-12 02:23:16,021 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2023-11-12 02:23:16,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2023-11-12 02:23:16,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:16,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2023-11-12 02:23:16,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,028 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 186 flow. Second operand 7 states and 614 transitions. [2023-11-12 02:23:16,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 71 transitions, 570 flow [2023-11-12 02:23:16,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 566 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-12 02:23:16,037 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 393 flow [2023-11-12 02:23:16,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-12 02:23:16,039 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-11-12 02:23:16,039 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 393 flow [2023-11-12 02:23:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.55555555555556) internal successors, (752), 9 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:16,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:16,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:16,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:23:16,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:16,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash -261729466, now seen corresponding path program 2 times [2023-11-12 02:23:16,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007576134] [2023-11-12 02:23:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007576134] [2023-11-12 02:23:16,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007576134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383194801] [2023-11-12 02:23:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:16,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:16,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:23:16,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:16,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:16,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:16,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:16,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383194801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:16,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2023-11-12 02:23:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478210703] [2023-11-12 02:23:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:23:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:23:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:23:16,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:16,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:16,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:16,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:16,712 INFO L124 PetriNetUnfolderBase]: 147/292 cut-off events. [2023-11-12 02:23:16,712 INFO L125 PetriNetUnfolderBase]: For 1209/1209 co-relation queries the response was YES. [2023-11-12 02:23:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 292 events. 147/292 cut-off events. For 1209/1209 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1191 event pairs, 12 based on Foata normal form. 4/295 useless extension candidates. Maximal degree in co-relation 1477. Up to 129 conditions per place. [2023-11-12 02:23:16,716 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 40 selfloop transitions, 4 changer transitions 19/65 dead transitions. [2023-11-12 02:23:16,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 673 flow [2023-11-12 02:23:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:23:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:23:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2023-11-12 02:23:16,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421416234887737 [2023-11-12 02:23:16,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2023-11-12 02:23:16,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2023-11-12 02:23:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2023-11-12 02:23:16,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,724 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,725 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 393 flow. Second operand 6 states and 512 transitions. [2023-11-12 02:23:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 673 flow [2023-11-12 02:23:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 598 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:16,732 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 296 flow [2023-11-12 02:23:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2023-11-12 02:23:16,732 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2023-11-12 02:23:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 296 flow [2023-11-12 02:23:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:16,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:16,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:23:16,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:16,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 7444097, now seen corresponding path program 3 times [2023-11-12 02:23:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451783530] [2023-11-12 02:23:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:17,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451783530] [2023-11-12 02:23:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451783530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:17,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909980425] [2023-11-12 02:23:17,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:23:17,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:17,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:17,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:17,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:23:17,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:23:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:17,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:17,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:17,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:17,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909980425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:17,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:17,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:23:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210541331] [2023-11-12 02:23:17,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:17,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:23:17,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:23:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:23:17,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 82.8) internal successors, (828), 10 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:17,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:17,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:17,500 INFO L124 PetriNetUnfolderBase]: 193/376 cut-off events. [2023-11-12 02:23:17,500 INFO L125 PetriNetUnfolderBase]: For 2501/2501 co-relation queries the response was YES. [2023-11-12 02:23:17,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 376 events. 193/376 cut-off events. For 2501/2501 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1579 event pairs, 6 based on Foata normal form. 16/391 useless extension candidates. Maximal degree in co-relation 1963. Up to 140 conditions per place. [2023-11-12 02:23:17,505 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 60 selfloop transitions, 25 changer transitions 5/92 dead transitions. [2023-11-12 02:23:17,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 892 flow [2023-11-12 02:23:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:23:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:23:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 860 transitions. [2023-11-12 02:23:17,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44559585492227977 [2023-11-12 02:23:17,510 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 860 transitions. [2023-11-12 02:23:17,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 860 transitions. [2023-11-12 02:23:17,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:17,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 860 transitions. [2023-11-12 02:23:17,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.0) internal successors, (860), 10 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:17,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:17,519 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:17,519 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 296 flow. Second operand 10 states and 860 transitions. [2023-11-12 02:23:17,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 892 flow [2023-11-12 02:23:17,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 830 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-12 02:23:17,530 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 613 flow [2023-11-12 02:23:17,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=613, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-12 02:23:17,531 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-12 02:23:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 613 flow [2023-11-12 02:23:17,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.8) internal successors, (828), 10 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:17,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:17,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:17,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:23:17,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:17,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1174848075, now seen corresponding path program 4 times [2023-11-12 02:23:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218432606] [2023-11-12 02:23:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:17,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218432606] [2023-11-12 02:23:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218432606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79947846] [2023-11-12 02:23:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:23:17,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:17,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:23:17,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:23:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:17,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:17,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:17,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79947846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:18,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:18,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:23:18,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984439531] [2023-11-12 02:23:18,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:18,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:23:18,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:23:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:23:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:18,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 613 flow. Second operand has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:18,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:18,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:18,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:18,410 INFO L124 PetriNetUnfolderBase]: 233/451 cut-off events. [2023-11-12 02:23:18,410 INFO L125 PetriNetUnfolderBase]: For 4320/4320 co-relation queries the response was YES. [2023-11-12 02:23:18,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2615 conditions, 451 events. 233/451 cut-off events. For 4320/4320 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1957 event pairs, 10 based on Foata normal form. 10/460 useless extension candidates. Maximal degree in co-relation 2591. Up to 140 conditions per place. [2023-11-12 02:23:18,416 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 62 selfloop transitions, 41 changer transitions 4/109 dead transitions. [2023-11-12 02:23:18,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 109 transitions, 1278 flow [2023-11-12 02:23:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:23:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:23:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 778 transitions. [2023-11-12 02:23:18,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478986758779505 [2023-11-12 02:23:18,421 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 778 transitions. [2023-11-12 02:23:18,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 778 transitions. [2023-11-12 02:23:18,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:18,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 778 transitions. [2023-11-12 02:23:18,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.44444444444444) internal successors, (778), 9 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:18,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:18,428 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:18,428 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 613 flow. Second operand 9 states and 778 transitions. [2023-11-12 02:23:18,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 109 transitions, 1278 flow [2023-11-12 02:23:18,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 1112 flow, removed 80 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:18,449 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 895 flow [2023-11-12 02:23:18,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=895, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-11-12 02:23:18,450 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-11-12 02:23:18,450 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 895 flow [2023-11-12 02:23:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:18,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:18,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:18,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:23:18,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:18,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2126670525, now seen corresponding path program 5 times [2023-11-12 02:23:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873078563] [2023-11-12 02:23:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:18,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873078563] [2023-11-12 02:23:18,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873078563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:18,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500050966] [2023-11-12 02:23:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:23:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:18,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:18,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:23:18,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:18,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:18,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:18,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500050966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:18,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:18,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:23:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341501127] [2023-11-12 02:23:18,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:23:18,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:23:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:23:19,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:19,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 895 flow. Second operand has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:19,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:19,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:19,291 INFO L124 PetriNetUnfolderBase]: 201/396 cut-off events. [2023-11-12 02:23:19,292 INFO L125 PetriNetUnfolderBase]: For 4072/4072 co-relation queries the response was YES. [2023-11-12 02:23:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 396 events. 201/396 cut-off events. For 4072/4072 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1649 event pairs, 8 based on Foata normal form. 20/415 useless extension candidates. Maximal degree in co-relation 2430. Up to 107 conditions per place. [2023-11-12 02:23:19,297 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 55 selfloop transitions, 40 changer transitions 1/98 dead transitions. [2023-11-12 02:23:19,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 1191 flow [2023-11-12 02:23:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:23:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:23:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 775 transitions. [2023-11-12 02:23:19,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44617156016119747 [2023-11-12 02:23:19,302 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 775 transitions. [2023-11-12 02:23:19,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 775 transitions. [2023-11-12 02:23:19,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:19,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 775 transitions. [2023-11-12 02:23:19,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.11111111111111) internal successors, (775), 9 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,310 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,310 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 895 flow. Second operand 9 states and 775 transitions. [2023-11-12 02:23:19,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 1191 flow [2023-11-12 02:23:19,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 1112 flow, removed 38 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:19,340 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 871 flow [2023-11-12 02:23:19,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=871, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2023-11-12 02:23:19,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-11-12 02:23:19,341 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 871 flow [2023-11-12 02:23:19,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:19,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:19,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:23:19,548 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:19,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1851431055, now seen corresponding path program 6 times [2023-11-12 02:23:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:19,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572873274] [2023-11-12 02:23:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:19,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:19,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572873274] [2023-11-12 02:23:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572873274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543979586] [2023-11-12 02:23:19,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:23:19,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:19,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:19,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:19,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:23:19,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:23:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:19,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:19,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:19,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543979586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:19,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:19,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:23:19,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139876340] [2023-11-12 02:23:19,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:19,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:23:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:23:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:23:19,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:19,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 871 flow. Second operand has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:19,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:19,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:19,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:20,217 INFO L124 PetriNetUnfolderBase]: 261/508 cut-off events. [2023-11-12 02:23:20,217 INFO L125 PetriNetUnfolderBase]: For 4566/4566 co-relation queries the response was YES. [2023-11-12 02:23:20,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3210 conditions, 508 events. 261/508 cut-off events. For 4566/4566 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2233 event pairs, 14 based on Foata normal form. 6/513 useless extension candidates. Maximal degree in co-relation 3181. Up to 248 conditions per place. [2023-11-12 02:23:20,253 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 74 selfloop transitions, 33 changer transitions 1/110 dead transitions. [2023-11-12 02:23:20,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1515 flow [2023-11-12 02:23:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:23:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:23:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 767 transitions. [2023-11-12 02:23:20,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415659182498561 [2023-11-12 02:23:20,257 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 767 transitions. [2023-11-12 02:23:20,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 767 transitions. [2023-11-12 02:23:20,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:20,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 767 transitions. [2023-11-12 02:23:20,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:20,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:20,264 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:20,265 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 871 flow. Second operand 9 states and 767 transitions. [2023-11-12 02:23:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1515 flow [2023-11-12 02:23:20,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 1412 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:20,288 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 1204 flow [2023-11-12 02:23:20,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1204, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-12 02:23:20,290 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-11-12 02:23:20,290 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 1204 flow [2023-11-12 02:23:20,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:20,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:20,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:20,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:20,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:23:20,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash 898340085, now seen corresponding path program 7 times [2023-11-12 02:23:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:20,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011354169] [2023-11-12 02:23:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:20,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011354169] [2023-11-12 02:23:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011354169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864094201] [2023-11-12 02:23:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:23:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:20,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:20,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:23:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:20,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:20,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:20,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864094201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:20,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:20,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:23:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786710927] [2023-11-12 02:23:20,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:23:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:23:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:23:20,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:20,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 1204 flow. Second operand has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:20,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:20,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:20,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:21,137 INFO L124 PetriNetUnfolderBase]: 230/453 cut-off events. [2023-11-12 02:23:21,137 INFO L125 PetriNetUnfolderBase]: For 4582/4582 co-relation queries the response was YES. [2023-11-12 02:23:21,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 453 events. 230/453 cut-off events. For 4582/4582 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1945 event pairs, 14 based on Foata normal form. 12/464 useless extension candidates. Maximal degree in co-relation 2954. Up to 248 conditions per place. [2023-11-12 02:23:21,144 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 67 selfloop transitions, 29 changer transitions 4/102 dead transitions. [2023-11-12 02:23:21,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 102 transitions, 1460 flow [2023-11-12 02:23:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:23:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:23:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 763 transitions. [2023-11-12 02:23:21,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392630972941854 [2023-11-12 02:23:21,149 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 763 transitions. [2023-11-12 02:23:21,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 763 transitions. [2023-11-12 02:23:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:21,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 763 transitions. [2023-11-12 02:23:21,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.77777777777777) internal successors, (763), 9 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:21,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:21,158 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:21,158 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 1204 flow. Second operand 9 states and 763 transitions. [2023-11-12 02:23:21,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 102 transitions, 1460 flow [2023-11-12 02:23:21,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 1428 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:21,183 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 1114 flow [2023-11-12 02:23:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1114, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2023-11-12 02:23:21,183 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-11-12 02:23:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 1114 flow [2023-11-12 02:23:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:21,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:21,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:21,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:23:21,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:21,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1335841887, now seen corresponding path program 8 times [2023-11-12 02:23:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:21,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242967584] [2023-11-12 02:23:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:21,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242967584] [2023-11-12 02:23:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242967584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:21,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246431362] [2023-11-12 02:23:21,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:21,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:21,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:21,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:21,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:23:21,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:21,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:21,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:21,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246431362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:21,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:23:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393768029] [2023-11-12 02:23:21,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:23:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:23:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:21,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:21,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 1114 flow. Second operand has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:21,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:21,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:21,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:22,084 INFO L124 PetriNetUnfolderBase]: 235/456 cut-off events. [2023-11-12 02:23:22,084 INFO L125 PetriNetUnfolderBase]: For 4762/4762 co-relation queries the response was YES. [2023-11-12 02:23:22,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 456 events. 235/456 cut-off events. For 4762/4762 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1920 event pairs, 12 based on Foata normal form. 6/461 useless extension candidates. Maximal degree in co-relation 3058. Up to 276 conditions per place. [2023-11-12 02:23:22,091 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 71 selfloop transitions, 31 changer transitions 3/107 dead transitions. [2023-11-12 02:23:22,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 107 transitions, 1549 flow [2023-11-12 02:23:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:23:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:23:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1011 transitions. [2023-11-12 02:23:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365284974093264 [2023-11-12 02:23:22,097 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1011 transitions. [2023-11-12 02:23:22,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1011 transitions. [2023-11-12 02:23:22,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:22,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1011 transitions. [2023-11-12 02:23:22,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 84.25) internal successors, (1011), 12 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:22,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 193.0) internal successors, (2509), 13 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:22,107 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 193.0) internal successors, (2509), 13 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:22,107 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 1114 flow. Second operand 12 states and 1011 transitions. [2023-11-12 02:23:22,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 107 transitions, 1549 flow [2023-11-12 02:23:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 107 transitions, 1471 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-12 02:23:22,134 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 1219 flow [2023-11-12 02:23:22,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1219, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2023-11-12 02:23:22,135 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2023-11-12 02:23:22,135 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 1219 flow [2023-11-12 02:23:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:22,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:22,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:22,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:23:22,342 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:22,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1288964148, now seen corresponding path program 9 times [2023-11-12 02:23:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229114338] [2023-11-12 02:23:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:22,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:22,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:22,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229114338] [2023-11-12 02:23:22,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229114338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:22,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372033821] [2023-11-12 02:23:22,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:23:22,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:22,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:22,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:23:22,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:23:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:22,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:23:22,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:22,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:22,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372033821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:22,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:22,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 12 [2023-11-12 02:23:22,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95307088] [2023-11-12 02:23:22,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:23:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:23:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:23:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:22,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 1219 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:22,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:22,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:22,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:23,264 INFO L124 PetriNetUnfolderBase]: 342/651 cut-off events. [2023-11-12 02:23:23,265 INFO L125 PetriNetUnfolderBase]: For 10176/10176 co-relation queries the response was YES. [2023-11-12 02:23:23,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 651 events. 342/651 cut-off events. For 10176/10176 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3073 event pairs, 23 based on Foata normal form. 34/684 useless extension candidates. Maximal degree in co-relation 4404. Up to 322 conditions per place. [2023-11-12 02:23:23,275 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 99 selfloop transitions, 45 changer transitions 11/157 dead transitions. [2023-11-12 02:23:23,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 157 transitions, 2274 flow [2023-11-12 02:23:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:23:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:23:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 872 transitions. [2023-11-12 02:23:23,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45181347150259066 [2023-11-12 02:23:23,281 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 872 transitions. [2023-11-12 02:23:23,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 872 transitions. [2023-11-12 02:23:23,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:23,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 872 transitions. [2023-11-12 02:23:23,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.2) internal successors, (872), 10 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:23,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:23,288 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:23,289 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 1219 flow. Second operand 10 states and 872 transitions. [2023-11-12 02:23:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 157 transitions, 2274 flow [2023-11-12 02:23:23,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 157 transitions, 2220 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-12 02:23:23,336 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 1708 flow [2023-11-12 02:23:23,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1708, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2023-11-12 02:23:23,337 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2023-11-12 02:23:23,337 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 1708 flow [2023-11-12 02:23:23,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:23,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:23,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:23,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:23:23,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:23,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1493018320, now seen corresponding path program 10 times [2023-11-12 02:23:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:23,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374592001] [2023-11-12 02:23:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:23,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:23,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374592001] [2023-11-12 02:23:23,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374592001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271176804] [2023-11-12 02:23:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:23:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:23,697 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:23:23,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:23:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:23,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:23:23,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:23,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:23:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271176804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:23,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:23,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 9 [2023-11-12 02:23:23,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232350446] [2023-11-12 02:23:23,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:23,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:23:23,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:23,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:23:23,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:24,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 1708 flow. Second operand has 11 states, 11 states have (on average 82.9090909090909) internal successors, (912), 11 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:24,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:24,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:24,419 INFO L124 PetriNetUnfolderBase]: 507/967 cut-off events. [2023-11-12 02:23:24,421 INFO L125 PetriNetUnfolderBase]: For 16355/16355 co-relation queries the response was YES. [2023-11-12 02:23:24,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7371 conditions, 967 events. 507/967 cut-off events. For 16355/16355 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5023 event pairs, 44 based on Foata normal form. 16/982 useless extension candidates. Maximal degree in co-relation 7324. Up to 540 conditions per place. [2023-11-12 02:23:24,437 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 129 selfloop transitions, 66 changer transitions 15/212 dead transitions. [2023-11-12 02:23:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 212 transitions, 3527 flow [2023-11-12 02:23:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:23:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:23:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 958 transitions. [2023-11-12 02:23:24,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45124823363165334 [2023-11-12 02:23:24,440 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 958 transitions. [2023-11-12 02:23:24,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 958 transitions. [2023-11-12 02:23:24,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:24,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 958 transitions. [2023-11-12 02:23:24,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 87.0909090909091) internal successors, (958), 11 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:24,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:24,466 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:24,466 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 1708 flow. Second operand 11 states and 958 transitions. [2023-11-12 02:23:24,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 212 transitions, 3527 flow [2023-11-12 02:23:24,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 212 transitions, 3389 flow, removed 69 selfloop flow, removed 0 redundant places. [2023-11-12 02:23:24,568 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 2600 flow [2023-11-12 02:23:24,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2600, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2023-11-12 02:23:24,569 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2023-11-12 02:23:24,569 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 2600 flow [2023-11-12 02:23:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.9090909090909) internal successors, (912), 11 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:24,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:24,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:24,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:24,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 994170832, now seen corresponding path program 11 times [2023-11-12 02:23:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821873843] [2023-11-12 02:23:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821873843] [2023-11-12 02:23:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821873843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196599237] [2023-11-12 02:23:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:23:24,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:24,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:24,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:23:25,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:23:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:25,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:23:25,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:25,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196599237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:25,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 12 [2023-11-12 02:23:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431337856] [2023-11-12 02:23:25,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:23:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:23:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:23:25,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:25,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 2600 flow. Second operand has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:25,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:25,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:25,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:25,724 INFO L124 PetriNetUnfolderBase]: 566/1078 cut-off events. [2023-11-12 02:23:25,725 INFO L125 PetriNetUnfolderBase]: For 24757/24757 co-relation queries the response was YES. [2023-11-12 02:23:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 1078 events. 566/1078 cut-off events. For 24757/24757 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5778 event pairs, 76 based on Foata normal form. 25/1102 useless extension candidates. Maximal degree in co-relation 8886. Up to 823 conditions per place. [2023-11-12 02:23:25,743 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 157 selfloop transitions, 54 changer transitions 6/219 dead transitions. [2023-11-12 02:23:25,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 219 transitions, 3873 flow [2023-11-12 02:23:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:23:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:23:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 867 transitions. [2023-11-12 02:23:25,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492227979274611 [2023-11-12 02:23:25,746 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 867 transitions. [2023-11-12 02:23:25,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 867 transitions. [2023-11-12 02:23:25,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:25,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 867 transitions. [2023-11-12 02:23:25,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.7) internal successors, (867), 10 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:25,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:25,752 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:25,752 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 2600 flow. Second operand 10 states and 867 transitions. [2023-11-12 02:23:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 219 transitions, 3873 flow [2023-11-12 02:23:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 219 transitions, 3445 flow, removed 192 selfloop flow, removed 5 redundant places. [2023-11-12 02:23:25,886 INFO L231 Difference]: Finished difference. Result has 139 places, 183 transitions, 2809 flow [2023-11-12 02:23:25,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2809, PETRI_PLACES=139, PETRI_TRANSITIONS=183} [2023-11-12 02:23:25,886 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2023-11-12 02:23:25,887 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 183 transitions, 2809 flow [2023-11-12 02:23:25,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:25,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:25,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:25,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-12 02:23:26,098 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:26,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -335919287, now seen corresponding path program 12 times [2023-11-12 02:23:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:26,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053271973] [2023-11-12 02:23:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:26,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:26,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:26,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053271973] [2023-11-12 02:23:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053271973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646083665] [2023-11-12 02:23:26,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:23:26,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:26,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:26,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:26,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:23:26,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:23:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:26,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:26,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:26,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646083665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:26,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:26,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:23:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657899346] [2023-11-12 02:23:26,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:23:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:23:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:23:26,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:26,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 183 transitions, 2809 flow. Second operand has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:26,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:26,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:26,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:27,223 INFO L124 PetriNetUnfolderBase]: 884/1618 cut-off events. [2023-11-12 02:23:27,223 INFO L125 PetriNetUnfolderBase]: For 54617/54617 co-relation queries the response was YES. [2023-11-12 02:23:27,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 1618 events. 884/1618 cut-off events. For 54617/54617 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9158 event pairs, 26 based on Foata normal form. 40/1657 useless extension candidates. Maximal degree in co-relation 14017. Up to 449 conditions per place. [2023-11-12 02:23:27,252 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 154 selfloop transitions, 182 changer transitions 17/355 dead transitions. [2023-11-12 02:23:27,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 355 transitions, 6029 flow [2023-11-12 02:23:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:23:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:23:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1289 transitions. [2023-11-12 02:23:27,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452504317789292 [2023-11-12 02:23:27,256 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1289 transitions. [2023-11-12 02:23:27,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1289 transitions. [2023-11-12 02:23:27,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:27,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1289 transitions. [2023-11-12 02:23:27,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.93333333333334) internal successors, (1289), 15 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:27,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:27,266 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:27,266 INFO L175 Difference]: Start difference. First operand has 139 places, 183 transitions, 2809 flow. Second operand 15 states and 1289 transitions. [2023-11-12 02:23:27,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 355 transitions, 6029 flow [2023-11-12 02:23:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 355 transitions, 5628 flow, removed 179 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:27,496 INFO L231 Difference]: Finished difference. Result has 161 places, 279 transitions, 5171 flow [2023-11-12 02:23:27,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5171, PETRI_PLACES=161, PETRI_TRANSITIONS=279} [2023-11-12 02:23:27,497 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2023-11-12 02:23:27,498 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 279 transitions, 5171 flow [2023-11-12 02:23:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:27,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:27,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:27,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:27,712 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:27,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1069017253, now seen corresponding path program 13 times [2023-11-12 02:23:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714989351] [2023-11-12 02:23:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:27,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:27,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714989351] [2023-11-12 02:23:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714989351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:27,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139326032] [2023-11-12 02:23:27,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:23:27,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:27,796 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:27,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:23:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:27,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:27,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:27,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139326032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:28,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:28,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120089715] [2023-11-12 02:23:28,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:28,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:28,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 279 transitions, 5171 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:28,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:28,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:29,157 INFO L124 PetriNetUnfolderBase]: 950/1768 cut-off events. [2023-11-12 02:23:29,157 INFO L125 PetriNetUnfolderBase]: For 72856/72856 co-relation queries the response was YES. [2023-11-12 02:23:29,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17219 conditions, 1768 events. 950/1768 cut-off events. For 72856/72856 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10401 event pairs, 8 based on Foata normal form. 16/1783 useless extension candidates. Maximal degree in co-relation 17150. Up to 500 conditions per place. [2023-11-12 02:23:29,186 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 110 selfloop transitions, 257 changer transitions 7/376 dead transitions. [2023-11-12 02:23:29,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 376 transitions, 7594 flow [2023-11-12 02:23:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:23:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:23:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1285 transitions. [2023-11-12 02:23:29,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438687392055268 [2023-11-12 02:23:29,190 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1285 transitions. [2023-11-12 02:23:29,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1285 transitions. [2023-11-12 02:23:29,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:29,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1285 transitions. [2023-11-12 02:23:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.66666666666667) internal successors, (1285), 15 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:29,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:29,199 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:29,200 INFO L175 Difference]: Start difference. First operand has 161 places, 279 transitions, 5171 flow. Second operand 15 states and 1285 transitions. [2023-11-12 02:23:29,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 376 transitions, 7594 flow [2023-11-12 02:23:29,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 376 transitions, 6673 flow, removed 455 selfloop flow, removed 2 redundant places. [2023-11-12 02:23:29,754 INFO L231 Difference]: Finished difference. Result has 178 places, 322 transitions, 6506 flow [2023-11-12 02:23:29,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6506, PETRI_PLACES=178, PETRI_TRANSITIONS=322} [2023-11-12 02:23:29,754 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2023-11-12 02:23:29,754 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 322 transitions, 6506 flow [2023-11-12 02:23:29,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:29,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:29,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:29,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:29,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:29,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:29,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1220890537, now seen corresponding path program 14 times [2023-11-12 02:23:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:29,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840672713] [2023-11-12 02:23:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:30,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:30,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840672713] [2023-11-12 02:23:30,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840672713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537335523] [2023-11-12 02:23:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:30,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:30,054 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:30,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:23:30,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:30,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:30,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:30,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:30,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:30,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537335523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:30,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:30,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113999463] [2023-11-12 02:23:30,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:30,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:30,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 322 transitions, 6506 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:30,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:30,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:30,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:31,411 INFO L124 PetriNetUnfolderBase]: 902/1706 cut-off events. [2023-11-12 02:23:31,412 INFO L125 PetriNetUnfolderBase]: For 52360/52360 co-relation queries the response was YES. [2023-11-12 02:23:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16128 conditions, 1706 events. 902/1706 cut-off events. For 52360/52360 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10166 event pairs, 16 based on Foata normal form. 24/1729 useless extension candidates. Maximal degree in co-relation 16054. Up to 469 conditions per place. [2023-11-12 02:23:31,442 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 112 selfloop transitions, 244 changer transitions 1/359 dead transitions. [2023-11-12 02:23:31,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 359 transitions, 7385 flow [2023-11-12 02:23:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:23:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:23:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1199 transitions. [2023-11-12 02:23:31,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44374537379718726 [2023-11-12 02:23:31,447 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1199 transitions. [2023-11-12 02:23:31,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1199 transitions. [2023-11-12 02:23:31,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:31,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1199 transitions. [2023-11-12 02:23:31,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.64285714285714) internal successors, (1199), 14 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:31,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:31,457 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:31,457 INFO L175 Difference]: Start difference. First operand has 178 places, 322 transitions, 6506 flow. Second operand 14 states and 1199 transitions. [2023-11-12 02:23:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 359 transitions, 7385 flow [2023-11-12 02:23:31,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 359 transitions, 6905 flow, removed 229 selfloop flow, removed 3 redundant places. [2023-11-12 02:23:32,004 INFO L231 Difference]: Finished difference. Result has 189 places, 317 transitions, 6590 flow [2023-11-12 02:23:32,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6590, PETRI_PLACES=189, PETRI_TRANSITIONS=317} [2023-11-12 02:23:32,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 160 predicate places. [2023-11-12 02:23:32,005 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 317 transitions, 6590 flow [2023-11-12 02:23:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:32,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:32,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:32,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:32,206 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:32,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1767053857, now seen corresponding path program 15 times [2023-11-12 02:23:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765604451] [2023-11-12 02:23:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:32,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:32,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765604451] [2023-11-12 02:23:32,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765604451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:32,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435602447] [2023-11-12 02:23:32,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:23:32,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:32,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:32,297 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:23:32,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:23:32,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:32,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:32,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:23:32,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435602447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:32,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:32,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-12 02:23:32,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813816541] [2023-11-12 02:23:32,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:23:32,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:23:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:32,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:32,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 317 transitions, 6590 flow. Second operand has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:32,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:32,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:32,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:33,133 INFO L124 PetriNetUnfolderBase]: 939/1854 cut-off events. [2023-11-12 02:23:33,133 INFO L125 PetriNetUnfolderBase]: For 39106/39106 co-relation queries the response was YES. [2023-11-12 02:23:33,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16454 conditions, 1854 events. 939/1854 cut-off events. For 39106/39106 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11782 event pairs, 90 based on Foata normal form. 9/1862 useless extension candidates. Maximal degree in co-relation 16379. Up to 1140 conditions per place. [2023-11-12 02:23:33,157 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 293 selfloop transitions, 39 changer transitions 22/356 dead transitions. [2023-11-12 02:23:33,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 356 transitions, 7760 flow [2023-11-12 02:23:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:23:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:23:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 517 transitions. [2023-11-12 02:23:33,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464594127806563 [2023-11-12 02:23:33,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 517 transitions. [2023-11-12 02:23:33,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 517 transitions. [2023-11-12 02:23:33,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:33,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 517 transitions. [2023-11-12 02:23:33,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,163 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,163 INFO L175 Difference]: Start difference. First operand has 189 places, 317 transitions, 6590 flow. Second operand 6 states and 517 transitions. [2023-11-12 02:23:33,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 356 transitions, 7760 flow [2023-11-12 02:23:33,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 356 transitions, 7466 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-12 02:23:33,580 INFO L231 Difference]: Finished difference. Result has 190 places, 307 transitions, 6146 flow [2023-11-12 02:23:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=6304, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6146, PETRI_PLACES=190, PETRI_TRANSITIONS=307} [2023-11-12 02:23:33,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2023-11-12 02:23:33,582 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 307 transitions, 6146 flow [2023-11-12 02:23:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:33,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:33,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:33,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:23:33,783 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:33,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1945355701, now seen corresponding path program 16 times [2023-11-12 02:23:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055396443] [2023-11-12 02:23:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055396443] [2023-11-12 02:23:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055396443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086414163] [2023-11-12 02:23:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:23:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:33,867 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:33,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:23:33,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:23:33,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:33,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:33,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:34,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086414163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:34,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386405396] [2023-11-12 02:23:34,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:34,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:34,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 307 transitions, 6146 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:34,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:34,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:34,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:35,396 INFO L124 PetriNetUnfolderBase]: 1000/1950 cut-off events. [2023-11-12 02:23:35,397 INFO L125 PetriNetUnfolderBase]: For 48108/48108 co-relation queries the response was YES. [2023-11-12 02:23:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17282 conditions, 1950 events. 1000/1950 cut-off events. For 48108/48108 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12378 event pairs, 32 based on Foata normal form. 16/1965 useless extension candidates. Maximal degree in co-relation 17204. Up to 511 conditions per place. [2023-11-12 02:23:35,425 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 203 selfloop transitions, 223 changer transitions 15/443 dead transitions. [2023-11-12 02:23:35,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 443 transitions, 9309 flow [2023-11-12 02:23:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:23:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-12 02:23:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1794 transitions. [2023-11-12 02:23:35,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44263508512213173 [2023-11-12 02:23:35,430 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1794 transitions. [2023-11-12 02:23:35,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1794 transitions. [2023-11-12 02:23:35,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:35,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1794 transitions. [2023-11-12 02:23:35,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 193.0) internal successors, (4246), 22 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,444 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 193.0) internal successors, (4246), 22 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,445 INFO L175 Difference]: Start difference. First operand has 190 places, 307 transitions, 6146 flow. Second operand 21 states and 1794 transitions. [2023-11-12 02:23:35,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 443 transitions, 9309 flow [2023-11-12 02:23:35,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 443 transitions, 9184 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:35,948 INFO L231 Difference]: Finished difference. Result has 211 places, 370 transitions, 8315 flow [2023-11-12 02:23:35,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8315, PETRI_PLACES=211, PETRI_TRANSITIONS=370} [2023-11-12 02:23:35,949 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-11-12 02:23:35,949 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 370 transitions, 8315 flow [2023-11-12 02:23:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:35,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:35,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:35,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:36,155 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:36,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash -571978921, now seen corresponding path program 17 times [2023-11-12 02:23:36,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:36,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903483903] [2023-11-12 02:23:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:36,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903483903] [2023-11-12 02:23:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903483903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805252296] [2023-11-12 02:23:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:23:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:36,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:36,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:23:36,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:23:36,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:36,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:36,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:36,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805252296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:36,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:36,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284721657] [2023-11-12 02:23:36,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:36,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:36,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 370 transitions, 8315 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:36,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:36,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:36,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:37,601 INFO L124 PetriNetUnfolderBase]: 1010/1955 cut-off events. [2023-11-12 02:23:37,601 INFO L125 PetriNetUnfolderBase]: For 48329/48329 co-relation queries the response was YES. [2023-11-12 02:23:37,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 1955 events. 1010/1955 cut-off events. For 48329/48329 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12100 event pairs, 78 based on Foata normal form. 32/1986 useless extension candidates. Maximal degree in co-relation 18300. Up to 764 conditions per place. [2023-11-12 02:23:37,632 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 219 selfloop transitions, 207 changer transitions 12/440 dead transitions. [2023-11-12 02:23:37,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 440 transitions, 10033 flow [2023-11-12 02:23:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:23:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:23:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1194 transitions. [2023-11-12 02:23:37,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189489267209475 [2023-11-12 02:23:37,636 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1194 transitions. [2023-11-12 02:23:37,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1194 transitions. [2023-11-12 02:23:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:37,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1194 transitions. [2023-11-12 02:23:37,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,643 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:37,644 INFO L175 Difference]: Start difference. First operand has 211 places, 370 transitions, 8315 flow. Second operand 14 states and 1194 transitions. [2023-11-12 02:23:37,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 440 transitions, 10033 flow [2023-11-12 02:23:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 440 transitions, 9120 flow, removed 409 selfloop flow, removed 6 redundant places. [2023-11-12 02:23:38,316 INFO L231 Difference]: Finished difference. Result has 225 places, 387 transitions, 8491 flow [2023-11-12 02:23:38,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8491, PETRI_PLACES=225, PETRI_TRANSITIONS=387} [2023-11-12 02:23:38,318 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-11-12 02:23:38,318 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 387 transitions, 8491 flow [2023-11-12 02:23:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:38,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:38,319 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:38,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:23:38,526 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:38,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1233647027, now seen corresponding path program 18 times [2023-11-12 02:23:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305343809] [2023-11-12 02:23:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305343809] [2023-11-12 02:23:38,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305343809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118794176] [2023-11-12 02:23:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:23:38,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:38,616 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-12 02:23:38,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:23:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:38,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:38,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:38,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:38,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118794176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:38,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:38,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:23:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348926918] [2023-11-12 02:23:38,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:23:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:38,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:23:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:23:39,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:39,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 387 transitions, 8491 flow. Second operand has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:39,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:39,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:39,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:39,918 INFO L124 PetriNetUnfolderBase]: 951/1835 cut-off events. [2023-11-12 02:23:39,918 INFO L125 PetriNetUnfolderBase]: For 33237/33237 co-relation queries the response was YES. [2023-11-12 02:23:39,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16565 conditions, 1835 events. 951/1835 cut-off events. For 33237/33237 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11136 event pairs, 70 based on Foata normal form. 14/1848 useless extension candidates. Maximal degree in co-relation 16482. Up to 764 conditions per place. [2023-11-12 02:23:39,935 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 204 selfloop transitions, 211 changer transitions 1/418 dead transitions. [2023-11-12 02:23:39,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 418 transitions, 9358 flow [2023-11-12 02:23:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:23:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:23:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1189 transitions. [2023-11-12 02:23:39,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44004441154700225 [2023-11-12 02:23:39,938 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1189 transitions. [2023-11-12 02:23:39,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1189 transitions. [2023-11-12 02:23:39,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:39,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1189 transitions. [2023-11-12 02:23:39,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 84.92857142857143) internal successors, (1189), 14 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:39,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:39,946 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:39,946 INFO L175 Difference]: Start difference. First operand has 225 places, 387 transitions, 8491 flow. Second operand 14 states and 1189 transitions. [2023-11-12 02:23:39,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 418 transitions, 9358 flow [2023-11-12 02:23:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 418 transitions, 9127 flow, removed 70 selfloop flow, removed 7 redundant places. [2023-11-12 02:23:40,254 INFO L231 Difference]: Finished difference. Result has 231 places, 383 transitions, 8606 flow [2023-11-12 02:23:40,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=7985, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8606, PETRI_PLACES=231, PETRI_TRANSITIONS=383} [2023-11-12 02:23:40,255 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2023-11-12 02:23:40,255 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 383 transitions, 8606 flow [2023-11-12 02:23:40,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:40,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:40,255 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:40,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-12 02:23:40,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:23:40,456 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:40,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2014361675, now seen corresponding path program 19 times [2023-11-12 02:23:40,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:40,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298126871] [2023-11-12 02:23:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:40,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:40,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:40,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298126871] [2023-11-12 02:23:40,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298126871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:40,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745008725] [2023-11-12 02:23:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:23:40,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:40,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:40,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:40,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-12 02:23:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:40,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:40,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:40,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:40,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745008725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093706036] [2023-11-12 02:23:40,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:40,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:40,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 383 transitions, 8606 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:40,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:40,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:41,982 INFO L124 PetriNetUnfolderBase]: 1094/2123 cut-off events. [2023-11-12 02:23:41,982 INFO L125 PetriNetUnfolderBase]: For 40535/40535 co-relation queries the response was YES. [2023-11-12 02:23:41,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19518 conditions, 2123 events. 1094/2123 cut-off events. For 40535/40535 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13530 event pairs, 34 based on Foata normal form. 6/2128 useless extension candidates. Maximal degree in co-relation 19437. Up to 521 conditions per place. [2023-11-12 02:23:42,007 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 221 selfloop transitions, 283 changer transitions 5/511 dead transitions. [2023-11-12 02:23:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 511 transitions, 11300 flow [2023-11-12 02:23:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:23:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:23:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1630 transitions. [2023-11-12 02:23:42,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445050449959095 [2023-11-12 02:23:42,013 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1630 transitions. [2023-11-12 02:23:42,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1630 transitions. [2023-11-12 02:23:42,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:42,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1630 transitions. [2023-11-12 02:23:42,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.78947368421052) internal successors, (1630), 19 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 193.0) internal successors, (3860), 20 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:42,024 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 193.0) internal successors, (3860), 20 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:42,025 INFO L175 Difference]: Start difference. First operand has 231 places, 383 transitions, 8606 flow. Second operand 19 states and 1630 transitions. [2023-11-12 02:23:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 511 transitions, 11300 flow [2023-11-12 02:23:42,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 511 transitions, 11024 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-11-12 02:23:42,473 INFO L231 Difference]: Finished difference. Result has 247 places, 434 transitions, 10329 flow [2023-11-12 02:23:42,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=8361, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10329, PETRI_PLACES=247, PETRI_TRANSITIONS=434} [2023-11-12 02:23:42,474 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2023-11-12 02:23:42,474 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 434 transitions, 10329 flow [2023-11-12 02:23:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:42,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:42,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:42,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:23:42,681 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:42,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1570367435, now seen corresponding path program 20 times [2023-11-12 02:23:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268116943] [2023-11-12 02:23:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:42,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:42,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268116943] [2023-11-12 02:23:42,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268116943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:42,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282535826] [2023-11-12 02:23:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:42,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:42,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:42,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-12 02:23:42,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:42,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:42,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:42,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282535826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:43,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 02:23:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571129840] [2023-11-12 02:23:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:23:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:23:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:23:43,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:43,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 434 transitions, 10329 flow. Second operand has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:43,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:43,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:43,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:44,384 INFO L124 PetriNetUnfolderBase]: 1114/2125 cut-off events. [2023-11-12 02:23:44,385 INFO L125 PetriNetUnfolderBase]: For 38065/38065 co-relation queries the response was YES. [2023-11-12 02:23:44,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20880 conditions, 2125 events. 1114/2125 cut-off events. For 38065/38065 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13296 event pairs, 100 based on Foata normal form. 16/2140 useless extension candidates. Maximal degree in co-relation 20795. Up to 1313 conditions per place. [2023-11-12 02:23:44,416 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 327 selfloop transitions, 148 changer transitions 17/494 dead transitions. [2023-11-12 02:23:44,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 494 transitions, 12244 flow [2023-11-12 02:23:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:23:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:23:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1260 transitions. [2023-11-12 02:23:44,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43523316062176165 [2023-11-12 02:23:44,419 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1260 transitions. [2023-11-12 02:23:44,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1260 transitions. [2023-11-12 02:23:44,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:44,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1260 transitions. [2023-11-12 02:23:44,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,426 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,427 INFO L175 Difference]: Start difference. First operand has 247 places, 434 transitions, 10329 flow. Second operand 15 states and 1260 transitions. [2023-11-12 02:23:44,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 494 transitions, 12244 flow [2023-11-12 02:23:44,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 494 transitions, 12072 flow, removed 80 selfloop flow, removed 4 redundant places. [2023-11-12 02:23:44,909 INFO L231 Difference]: Finished difference. Result has 257 places, 452 transitions, 10863 flow [2023-11-12 02:23:44,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=9822, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10863, PETRI_PLACES=257, PETRI_TRANSITIONS=452} [2023-11-12 02:23:44,910 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2023-11-12 02:23:44,910 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 452 transitions, 10863 flow [2023-11-12 02:23:44,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.11764705882354) internal successors, (1396), 17 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:44,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:44,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:44,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:45,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:23:45,113 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:45,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1763693363, now seen corresponding path program 21 times [2023-11-12 02:23:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:45,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524667021] [2023-11-12 02:23:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:45,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524667021] [2023-11-12 02:23:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524667021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112700201] [2023-11-12 02:23:45,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:23:45,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:45,225 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:45,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-12 02:23:45,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:23:45,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:45,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:45,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:45,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112700201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:45,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:23:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179409311] [2023-11-12 02:23:45,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:23:45,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:23:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:23:45,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:45,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 452 transitions, 10863 flow. Second operand has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:45,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:45,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:46,640 INFO L124 PetriNetUnfolderBase]: 1067/2008 cut-off events. [2023-11-12 02:23:46,640 INFO L125 PetriNetUnfolderBase]: For 36578/36578 co-relation queries the response was YES. [2023-11-12 02:23:46,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19908 conditions, 2008 events. 1067/2008 cut-off events. For 36578/36578 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12265 event pairs, 76 based on Foata normal form. 20/2027 useless extension candidates. Maximal degree in co-relation 19822. Up to 916 conditions per place. [2023-11-12 02:23:46,662 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 247 selfloop transitions, 232 changer transitions 14/495 dead transitions. [2023-11-12 02:23:46,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 495 transitions, 12152 flow [2023-11-12 02:23:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:23:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:23:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1269 transitions. [2023-11-12 02:23:46,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383419689119171 [2023-11-12 02:23:46,665 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1269 transitions. [2023-11-12 02:23:46,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1269 transitions. [2023-11-12 02:23:46,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:46,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1269 transitions. [2023-11-12 02:23:46,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.6) internal successors, (1269), 15 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:46,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:46,669 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 193.0) internal successors, (3088), 16 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:46,669 INFO L175 Difference]: Start difference. First operand has 257 places, 452 transitions, 10863 flow. Second operand 15 states and 1269 transitions. [2023-11-12 02:23:46,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 495 transitions, 12152 flow [2023-11-12 02:23:47,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 495 transitions, 11878 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-11-12 02:23:47,041 INFO L231 Difference]: Finished difference. Result has 260 places, 445 transitions, 10798 flow [2023-11-12 02:23:47,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10798, PETRI_PLACES=260, PETRI_TRANSITIONS=445} [2023-11-12 02:23:47,042 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2023-11-12 02:23:47,042 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 445 transitions, 10798 flow [2023-11-12 02:23:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:47,043 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:47,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:47,248 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:47,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1444259179, now seen corresponding path program 22 times [2023-11-12 02:23:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:47,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893263061] [2023-11-12 02:23:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:47,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893263061] [2023-11-12 02:23:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893263061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997214329] [2023-11-12 02:23:47,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:23:47,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:47,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:47,335 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:47,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-12 02:23:47,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:23:47,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:47,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:47,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:47,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997214329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:47,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:47,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:23:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428008192] [2023-11-12 02:23:47,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:23:47,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:23:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:23:47,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:47,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 445 transitions, 10798 flow. Second operand has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:47,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:47,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:48,641 INFO L124 PetriNetUnfolderBase]: 1117/2142 cut-off events. [2023-11-12 02:23:48,641 INFO L125 PetriNetUnfolderBase]: For 39096/39096 co-relation queries the response was YES. [2023-11-12 02:23:48,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20928 conditions, 2142 events. 1117/2142 cut-off events. For 39096/39096 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13551 event pairs, 30 based on Foata normal form. 10/2151 useless extension candidates. Maximal degree in co-relation 20845. Up to 868 conditions per place. [2023-11-12 02:23:48,664 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 282 selfloop transitions, 246 changer transitions 0/530 dead transitions. [2023-11-12 02:23:48,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 530 transitions, 12730 flow [2023-11-12 02:23:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:23:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:23:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1373 transitions. [2023-11-12 02:23:48,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44462435233160624 [2023-11-12 02:23:48,665 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1373 transitions. [2023-11-12 02:23:48,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1373 transitions. [2023-11-12 02:23:48,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:48,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1373 transitions. [2023-11-12 02:23:48,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.8125) internal successors, (1373), 16 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 193.0) internal successors, (3281), 17 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,672 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 193.0) internal successors, (3281), 17 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:48,672 INFO L175 Difference]: Start difference. First operand has 260 places, 445 transitions, 10798 flow. Second operand 16 states and 1373 transitions. [2023-11-12 02:23:48,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 530 transitions, 12730 flow [2023-11-12 02:23:49,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 530 transitions, 12076 flow, removed 77 selfloop flow, removed 15 redundant places. [2023-11-12 02:23:49,062 INFO L231 Difference]: Finished difference. Result has 263 places, 477 transitions, 11470 flow [2023-11-12 02:23:49,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10163, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11470, PETRI_PLACES=263, PETRI_TRANSITIONS=477} [2023-11-12 02:23:49,063 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 234 predicate places. [2023-11-12 02:23:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 477 transitions, 11470 flow [2023-11-12 02:23:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:49,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:49,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:49,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:49,267 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:49,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash -930938588, now seen corresponding path program 23 times [2023-11-12 02:23:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:49,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764553648] [2023-11-12 02:23:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764553648] [2023-11-12 02:23:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764553648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149595643] [2023-11-12 02:23:49,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:23:49,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:49,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:49,411 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-12 02:23:49,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:23:49,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:49,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:23:49,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:49,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149595643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:49,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:49,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 17 [2023-11-12 02:23:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60457742] [2023-11-12 02:23:49,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:23:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:23:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:23:49,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:49,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 477 transitions, 11470 flow. Second operand has 19 states, 19 states have (on average 82.3157894736842) internal successors, (1564), 19 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:49,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:49,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:51,043 INFO L124 PetriNetUnfolderBase]: 1452/2772 cut-off events. [2023-11-12 02:23:51,043 INFO L125 PetriNetUnfolderBase]: For 54944/54944 co-relation queries the response was YES. [2023-11-12 02:23:51,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27265 conditions, 2772 events. 1452/2772 cut-off events. For 54944/54944 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18526 event pairs, 124 based on Foata normal form. 69/2840 useless extension candidates. Maximal degree in co-relation 27185. Up to 1701 conditions per place. [2023-11-12 02:23:51,076 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 426 selfloop transitions, 171 changer transitions 18/617 dead transitions. [2023-11-12 02:23:51,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 617 transitions, 15133 flow [2023-11-12 02:23:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:23:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:23:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1130 transitions. [2023-11-12 02:23:51,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503786369071343 [2023-11-12 02:23:51,079 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1130 transitions. [2023-11-12 02:23:51,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1130 transitions. [2023-11-12 02:23:51,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:51,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1130 transitions. [2023-11-12 02:23:51,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 86.92307692307692) internal successors, (1130), 13 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:51,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 193.0) internal successors, (2702), 14 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:51,085 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 193.0) internal successors, (2702), 14 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:51,086 INFO L175 Difference]: Start difference. First operand has 263 places, 477 transitions, 11470 flow. Second operand 13 states and 1130 transitions. [2023-11-12 02:23:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 617 transitions, 15133 flow [2023-11-12 02:23:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 617 transitions, 14822 flow, removed 32 selfloop flow, removed 7 redundant places. [2023-11-12 02:23:51,884 INFO L231 Difference]: Finished difference. Result has 276 places, 547 transitions, 13046 flow [2023-11-12 02:23:51,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=11251, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13046, PETRI_PLACES=276, PETRI_TRANSITIONS=547} [2023-11-12 02:23:51,885 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 247 predicate places. [2023-11-12 02:23:51,885 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 547 transitions, 13046 flow [2023-11-12 02:23:51,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.3157894736842) internal successors, (1564), 19 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:51,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:51,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:51,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-12 02:23:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:52,091 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:52,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1322654318, now seen corresponding path program 24 times [2023-11-12 02:23:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815149349] [2023-11-12 02:23:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815149349] [2023-11-12 02:23:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815149349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957797977] [2023-11-12 02:23:52,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:23:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:52,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:52,230 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:52,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-12 02:23:52,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-12 02:23:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:52,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:52,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:23:52,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957797977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:52,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-12 02:23:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708194526] [2023-11-12 02:23:52,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:23:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:23:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:52,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:52,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 547 transitions, 13046 flow. Second operand has 6 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:52,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:52,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:53,590 INFO L124 PetriNetUnfolderBase]: 1409/2692 cut-off events. [2023-11-12 02:23:53,590 INFO L125 PetriNetUnfolderBase]: For 46861/46861 co-relation queries the response was YES. [2023-11-12 02:23:53,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26950 conditions, 2692 events. 1409/2692 cut-off events. For 46861/46861 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18005 event pairs, 172 based on Foata normal form. 33/2724 useless extension candidates. Maximal degree in co-relation 26863. Up to 1025 conditions per place. [2023-11-12 02:23:53,620 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 47 selfloop transitions, 2 changer transitions 557/608 dead transitions. [2023-11-12 02:23:53,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 608 transitions, 15319 flow [2023-11-12 02:23:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:23:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:23:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 514 transitions. [2023-11-12 02:23:53,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438687392055268 [2023-11-12 02:23:53,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 514 transitions. [2023-11-12 02:23:53,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 514 transitions. [2023-11-12 02:23:53,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:53,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 514 transitions. [2023-11-12 02:23:53,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:53,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:53,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:53,625 INFO L175 Difference]: Start difference. First operand has 276 places, 547 transitions, 13046 flow. Second operand 6 states and 514 transitions. [2023-11-12 02:23:53,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 608 transitions, 15319 flow [2023-11-12 02:23:54,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 608 transitions, 15115 flow, removed 71 selfloop flow, removed 1 redundant places. [2023-11-12 02:23:54,294 INFO L231 Difference]: Finished difference. Result has 277 places, 48 transitions, 798 flow [2023-11-12 02:23:54,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=12863, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=798, PETRI_PLACES=277, PETRI_TRANSITIONS=48} [2023-11-12 02:23:54,295 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-11-12 02:23:54,295 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 48 transitions, 798 flow [2023-11-12 02:23:54,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:54,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:54,296 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:54,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-12 02:23:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-12 02:23:54,496 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:54,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 166724289, now seen corresponding path program 25 times [2023-11-12 02:23:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494626131] [2023-11-12 02:23:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:54,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494626131] [2023-11-12 02:23:54,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494626131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768220109] [2023-11-12 02:23:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:23:54,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:54,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:54,612 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:54,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-12 02:23:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:54,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:23:54,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:54,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768220109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:54,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:54,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-12 02:23:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431465377] [2023-11-12 02:23:54,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:23:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:23:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:23:55,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:55,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 48 transitions, 798 flow. Second operand has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:55,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:55,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:55,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:55,288 INFO L124 PetriNetUnfolderBase]: 150/354 cut-off events. [2023-11-12 02:23:55,288 INFO L125 PetriNetUnfolderBase]: For 8869/8869 co-relation queries the response was YES. [2023-11-12 02:23:55,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3299 conditions, 354 events. 150/354 cut-off events. For 8869/8869 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1614 event pairs, 18 based on Foata normal form. 16/369 useless extension candidates. Maximal degree in co-relation 3209. Up to 138 conditions per place. [2023-11-12 02:23:55,293 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 56 selfloop transitions, 16 changer transitions 18/92 dead transitions. [2023-11-12 02:23:55,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 92 transitions, 1436 flow [2023-11-12 02:23:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:23:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:23:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1026 transitions. [2023-11-12 02:23:55,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430051813471503 [2023-11-12 02:23:55,296 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1026 transitions. [2023-11-12 02:23:55,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1026 transitions. [2023-11-12 02:23:55,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:55,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1026 transitions. [2023-11-12 02:23:55,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 85.5) internal successors, (1026), 12 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:55,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 193.0) internal successors, (2509), 13 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:55,302 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 193.0) internal successors, (2509), 13 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:55,303 INFO L175 Difference]: Start difference. First operand has 277 places, 48 transitions, 798 flow. Second operand 12 states and 1026 transitions. [2023-11-12 02:23:55,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 92 transitions, 1436 flow [2023-11-12 02:23:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 92 transitions, 827 flow, removed 127 selfloop flow, removed 78 redundant places. [2023-11-12 02:23:55,330 INFO L231 Difference]: Finished difference. Result has 122 places, 48 transitions, 526 flow [2023-11-12 02:23:55,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=526, PETRI_PLACES=122, PETRI_TRANSITIONS=48} [2023-11-12 02:23:55,331 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2023-11-12 02:23:55,332 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 48 transitions, 526 flow [2023-11-12 02:23:55,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:55,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:55,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:55,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-12 02:23:55,539 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:55,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 634353471, now seen corresponding path program 26 times [2023-11-12 02:23:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:55,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836786318] [2023-11-12 02:23:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:55,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:55,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836786318] [2023-11-12 02:23:55,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836786318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:55,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249638471] [2023-11-12 02:23:55,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:23:55,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:55,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:55,645 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:55,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-12 02:23:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:23:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:55,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:23:55,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:55,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249638471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:55,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:55,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-12 02:23:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165256695] [2023-11-12 02:23:55,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:55,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:23:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:23:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:23:56,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:56,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 48 transitions, 526 flow. Second operand has 22 states, 22 states have (on average 81.9090909090909) internal successors, (1802), 22 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:56,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:56,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:56,347 INFO L124 PetriNetUnfolderBase]: 111/257 cut-off events. [2023-11-12 02:23:56,347 INFO L125 PetriNetUnfolderBase]: For 1135/1135 co-relation queries the response was YES. [2023-11-12 02:23:56,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 257 events. 111/257 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 979 event pairs, 18 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 1612. Up to 138 conditions per place. [2023-11-12 02:23:56,350 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 55 selfloop transitions, 12 changer transitions 7/76 dead transitions. [2023-11-12 02:23:56,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 76 transitions, 772 flow [2023-11-12 02:23:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:23:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:23:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2023-11-12 02:23:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394724446537918 [2023-11-12 02:23:56,352 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2023-11-12 02:23:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2023-11-12 02:23:56,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:56,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2023-11-12 02:23:56,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,356 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,356 INFO L175 Difference]: Start difference. First operand has 122 places, 48 transitions, 526 flow. Second operand 11 states and 933 transitions. [2023-11-12 02:23:56,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 76 transitions, 772 flow [2023-11-12 02:23:56,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 76 transitions, 710 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-12 02:23:56,366 INFO L231 Difference]: Finished difference. Result has 126 places, 44 transitions, 437 flow [2023-11-12 02:23:56,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=437, PETRI_PLACES=126, PETRI_TRANSITIONS=44} [2023-11-12 02:23:56,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2023-11-12 02:23:56,367 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 44 transitions, 437 flow [2023-11-12 02:23:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.9090909090909) internal successors, (1802), 22 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:56,367 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:56,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:56,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-12 02:23:56,572 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:56,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash 987949653, now seen corresponding path program 27 times [2023-11-12 02:23:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:56,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690031339] [2023-11-12 02:23:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690031339] [2023-11-12 02:23:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690031339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289360312] [2023-11-12 02:23:56,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:23:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:56,686 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:56,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-12 02:23:56,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:23:56,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:56,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:23:56,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:23:56,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:56,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289360312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:56,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-12 02:23:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048840949] [2023-11-12 02:23:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:56,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:23:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:23:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:23:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:56,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 44 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:56,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:56,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:56,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:56,994 INFO L124 PetriNetUnfolderBase]: 101/232 cut-off events. [2023-11-12 02:23:56,994 INFO L125 PetriNetUnfolderBase]: For 931/931 co-relation queries the response was YES. [2023-11-12 02:23:56,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 232 events. 101/232 cut-off events. For 931/931 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 841 event pairs, 2 based on Foata normal form. 4/235 useless extension candidates. Maximal degree in co-relation 1370. Up to 90 conditions per place. [2023-11-12 02:23:56,997 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 24 selfloop transitions, 3 changer transitions 35/64 dead transitions. [2023-11-12 02:23:56,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 64 transitions, 704 flow [2023-11-12 02:23:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:23:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:23:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2023-11-12 02:23:57,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421416234887737 [2023-11-12 02:23:57,000 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2023-11-12 02:23:57,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2023-11-12 02:23:57,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:57,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2023-11-12 02:23:57,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,005 INFO L175 Difference]: Start difference. First operand has 126 places, 44 transitions, 437 flow. Second operand 6 states and 512 transitions. [2023-11-12 02:23:57,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 64 transitions, 704 flow [2023-11-12 02:23:57,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 64 transitions, 667 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-11-12 02:23:57,013 INFO L231 Difference]: Finished difference. Result has 123 places, 24 transitions, 183 flow [2023-11-12 02:23:57,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=123, PETRI_TRANSITIONS=24} [2023-11-12 02:23:57,014 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-11-12 02:23:57,014 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 24 transitions, 183 flow [2023-11-12 02:23:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:57,015 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:57,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-12 02:23:57,221 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:23:57,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash 866635980, now seen corresponding path program 28 times [2023-11-12 02:23:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:57,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508951877] [2023-11-12 02:23:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:57,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508951877] [2023-11-12 02:23:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508951877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878691957] [2023-11-12 02:23:57,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:23:57,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:57,429 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:57,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-12 02:23:57,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:23:57,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:23:57,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:23:57,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:57,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:23:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878691957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:57,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:57,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 22 [2023-11-12 02:23:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945987805] [2023-11-12 02:23:57,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:57,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:23:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:23:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:23:58,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:23:58,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 24 transitions, 183 flow. Second operand has 24 states, 24 states have (on average 82.08333333333333) internal successors, (1970), 24 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:23:58,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:23:58,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:23:58,410 INFO L124 PetriNetUnfolderBase]: 55/135 cut-off events. [2023-11-12 02:23:58,410 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2023-11-12 02:23:58,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 135 events. 55/135 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 4 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 945. Up to 33 conditions per place. [2023-11-12 02:23:58,412 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 37 selfloop transitions, 16 changer transitions 16/71 dead transitions. [2023-11-12 02:23:58,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 71 transitions, 595 flow [2023-11-12 02:23:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:23:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:23:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1348 transitions. [2023-11-12 02:23:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365284974093264 [2023-11-12 02:23:58,416 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1348 transitions. [2023-11-12 02:23:58,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1348 transitions. [2023-11-12 02:23:58,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:23:58,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1348 transitions. [2023-11-12 02:23:58,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.25) internal successors, (1348), 16 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 193.0) internal successors, (3281), 17 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,422 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 193.0) internal successors, (3281), 17 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,422 INFO L175 Difference]: Start difference. First operand has 123 places, 24 transitions, 183 flow. Second operand 16 states and 1348 transitions. [2023-11-12 02:23:58,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 71 transitions, 595 flow [2023-11-12 02:23:58,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 71 transitions, 485 flow, removed 27 selfloop flow, removed 20 redundant places. [2023-11-12 02:23:58,427 INFO L231 Difference]: Finished difference. Result has 105 places, 31 transitions, 226 flow [2023-11-12 02:23:58,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=226, PETRI_PLACES=105, PETRI_TRANSITIONS=31} [2023-11-12 02:23:58,428 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2023-11-12 02:23:58,428 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 31 transitions, 226 flow [2023-11-12 02:23:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.08333333333333) internal successors, (1970), 24 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:58,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:23:58,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:58,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12aaa519-0403-4476-9bec-c3afd6e9e7a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0