./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu --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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:01,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:02,052 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:35:02,062 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:02,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:02,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:02,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:02,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:02,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:02,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:02,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:02,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:02,110 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:02,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:02,116 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:02,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:02,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:02,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:02,118 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:35:02,119 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:35:02,119 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:35:02,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:02,120 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:35:02,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:35:02,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:02,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:02,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:02,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:02,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:02,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:02,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:02,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:02,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:02,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:02,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:02,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:02,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:02,127 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:02,127 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_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2023-11-19 07:35:02,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:02,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:02,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:02,412 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:02,413 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:02,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-19 07:35:05,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:06,039 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:06,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-19 07:35:06,065 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/data/027bef506/7959ed81b89543e4991e615bec246414/FLAG39bb25a65 [2023-11-19 07:35:06,080 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/data/027bef506/7959ed81b89543e4991e615bec246414 [2023-11-19 07:35:06,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:06,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:06,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:06,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:06,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:06,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23609165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06, skipping insertion in model container [2023-11-19 07:35:06,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:06,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:06,560 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:06,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:06,667 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:06,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06 WrapperNode [2023-11-19 07:35:06,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:06,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:06,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:06,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:06,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,721 INFO L138 Inliner]: procedures = 170, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2023-11-19 07:35:06,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:06,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:06,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:06,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:06,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,748 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:06,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:06,763 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:06,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:06,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:06,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:35:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:35:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:35:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:06,841 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:35:06,988 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:06,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:07,251 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:07,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:07,263 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 07:35:07,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:07 BoogieIcfgContainer [2023-11-19 07:35:07,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:07,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:07,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:07,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:07,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:06" (1/3) ... [2023-11-19 07:35:07,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323e05a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:07, skipping insertion in model container [2023-11-19 07:35:07,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (2/3) ... [2023-11-19 07:35:07,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323e05a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:07, skipping insertion in model container [2023-11-19 07:35:07,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:07" (3/3) ... [2023-11-19 07:35:07,279 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-11-19 07:35:07,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:07,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:35:07,297 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:07,384 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:35:07,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,542 INFO L124 PetriNetUnfolderBase]: 19/176 cut-off events. [2023-11-19 07:35:07,543 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 176 events. 19/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-19 07:35:07,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:07,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 126 transitions, 259 flow [2023-11-19 07:35:07,669 INFO L124 PetriNetUnfolderBase]: 19/176 cut-off events. [2023-11-19 07:35:07,670 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:07,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 176 events. 19/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-19 07:35:07,676 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2023-11-19 07:35:12,020 INFO L134 LiptonReduction]: Checked pairs total: 5387 [2023-11-19 07:35:12,020 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-19 07:35:12,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:12,045 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;@2f0a1874, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:12,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:35:12,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:12,048 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:35:12,048 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:12,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:12,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:12,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash 15548, now seen corresponding path program 1 times [2023-11-19 07:35:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095061918] [2023-11-19 07:35:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095061918] [2023-11-19 07:35:12,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095061918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:12,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:12,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657521976] [2023-11-19 07:35:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:12,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 245 [2023-11-19 07:35:12,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 38 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:12,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 245 [2023-11-19 07:35:12,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:12,620 INFO L124 PetriNetUnfolderBase]: 105/252 cut-off events. [2023-11-19 07:35:12,620 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 252 events. 105/252 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 958 event pairs, 88 based on Foata normal form. 14/204 useless extension candidates. Maximal degree in co-relation 464. Up to 209 conditions per place. [2023-11-19 07:35:12,624 INFO L140 encePairwiseOnDemand]: 231/245 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-11-19 07:35:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 143 flow [2023-11-19 07:35:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-11-19 07:35:12,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48435374149659866 [2023-11-19 07:35:12,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-11-19 07:35:12,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-11-19 07:35:12,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:12,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-11-19 07:35:12,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,663 INFO L175 Difference]: Start difference. First operand has 31 places, 38 transitions, 83 flow. Second operand 3 states and 356 transitions. [2023-11-19 07:35:12,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 143 flow [2023-11-19 07:35:12,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:12,668 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 63 flow [2023-11-19 07:35:12,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-19 07:35:12,674 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-19 07:35:12,674 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 63 flow [2023-11-19 07:35:12,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:12,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:12,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 15549, now seen corresponding path program 1 times [2023-11-19 07:35:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191534100] [2023-11-19 07:35:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191534100] [2023-11-19 07:35:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191534100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:12,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425941856] [2023-11-19 07:35:12,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:12,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:12,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:12,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:12,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 245 [2023-11-19 07:35:12,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:12,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 245 [2023-11-19 07:35:12,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:13,052 INFO L124 PetriNetUnfolderBase]: 96/223 cut-off events. [2023-11-19 07:35:13,053 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:35:13,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 223 events. 96/223 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 767 event pairs, 77 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2023-11-19 07:35:13,055 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-19 07:35:13,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 147 flow [2023-11-19 07:35:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-11-19 07:35:13,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47210884353741495 [2023-11-19 07:35:13,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-11-19 07:35:13,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-11-19 07:35:13,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:13,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-11-19 07:35:13,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,077 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 63 flow. Second operand 3 states and 347 transitions. [2023-11-19 07:35:13,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 147 flow [2023-11-19 07:35:13,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:13,080 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 69 flow [2023-11-19 07:35:13,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-19 07:35:13,084 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-19 07:35:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 69 flow [2023-11-19 07:35:13,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:13,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:35:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:35:13,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:13,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 463498502, now seen corresponding path program 1 times [2023-11-19 07:35:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418595699] [2023-11-19 07:35:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418595699] [2023-11-19 07:35:13,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418595699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520767419] [2023-11-19 07:35:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:13,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:13,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:35:13,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:13,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:35:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520767419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:13,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:35:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52440338] [2023-11-19 07:35:13,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:13,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:13,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 245 [2023-11-19 07:35:13,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 69 flow. Second operand has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:13,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 245 [2023-11-19 07:35:13,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:13,778 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events. [2023-11-19 07:35:13,778 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:35:13,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 55 events. 16/55 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-11-19 07:35:13,779 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-19 07:35:13,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 98 flow [2023-11-19 07:35:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2023-11-19 07:35:13,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316326530612245 [2023-11-19 07:35:13,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2023-11-19 07:35:13,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2023-11-19 07:35:13,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:13,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2023-11-19 07:35:13,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,788 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,788 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 69 flow. Second operand 4 states and 423 transitions. [2023-11-19 07:35:13,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 98 flow [2023-11-19 07:35:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:35:13,790 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-11-19 07:35:13,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-11-19 07:35:13,791 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -11 predicate places. [2023-11-19 07:35:13,791 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-11-19 07:35:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:13,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:35:13,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:14,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:14,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:14,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1483551948, now seen corresponding path program 1 times [2023-11-19 07:35:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247205002] [2023-11-19 07:35:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:14,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:14,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:14,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:14,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:14,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:35:14,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:35:14,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:35:14,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:35:14,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:35:14,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:35:14,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:35:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:35:14,094 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:35:14,097 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:14,098 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:35:14,132 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:35:14,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,185 INFO L124 PetriNetUnfolderBase]: 34/287 cut-off events. [2023-11-19 07:35:14,185 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:35:14,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 287 events. 34/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 919 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-19 07:35:14,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:14,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 156 transitions, 328 flow [2023-11-19 07:35:14,250 INFO L124 PetriNetUnfolderBase]: 34/287 cut-off events. [2023-11-19 07:35:14,251 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:35:14,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 287 events. 34/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 919 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-19 07:35:14,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 8456 [2023-11-19 07:35:18,149 INFO L134 LiptonReduction]: Checked pairs total: 18938 [2023-11-19 07:35:18,150 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-11-19 07:35:18,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:18,154 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;@2f0a1874, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:18,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:35:18,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:18,157 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-19 07:35:18,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:18,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:18,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:18,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:18,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash 25596, now seen corresponding path program 1 times [2023-11-19 07:35:18,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73717530] [2023-11-19 07:35:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73717530] [2023-11-19 07:35:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73717530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:18,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:18,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:18,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240981234] [2023-11-19 07:35:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:18,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 285 [2023-11-19 07:35:18,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 61 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:18,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 285 [2023-11-19 07:35:18,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:18,816 INFO L124 PetriNetUnfolderBase]: 1864/3311 cut-off events. [2023-11-19 07:35:18,816 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-19 07:35:18,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6420 conditions, 3311 events. 1864/3311 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20890 event pairs, 896 based on Foata normal form. 665/3353 useless extension candidates. Maximal degree in co-relation 855. Up to 3055 conditions per place. [2023-11-19 07:35:18,842 INFO L140 encePairwiseOnDemand]: 266/285 looper letters, 41 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-11-19 07:35:18,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 214 flow [2023-11-19 07:35:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-11-19 07:35:18,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52046783625731 [2023-11-19 07:35:18,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-11-19 07:35:18,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-11-19 07:35:18,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:18,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-11-19 07:35:18,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,852 INFO L175 Difference]: Start difference. First operand has 49 places, 61 transitions, 138 flow. Second operand 3 states and 445 transitions. [2023-11-19 07:35:18,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 214 flow [2023-11-19 07:35:18,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:18,857 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 120 flow [2023-11-19 07:35:18,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-19 07:35:18,859 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-19 07:35:18,860 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 120 flow [2023-11-19 07:35:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:18,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:18,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:35:18,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:18,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash 25597, now seen corresponding path program 1 times [2023-11-19 07:35:18,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780094499] [2023-11-19 07:35:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780094499] [2023-11-19 07:35:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780094499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:18,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:18,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377893953] [2023-11-19 07:35:18,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:18,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:18,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 285 [2023-11-19 07:35:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 285 [2023-11-19 07:35:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:19,371 INFO L124 PetriNetUnfolderBase]: 1500/2696 cut-off events. [2023-11-19 07:35:19,371 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-11-19 07:35:19,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2696 events. 1500/2696 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16307 event pairs, 1368 based on Foata normal form. 0/2347 useless extension candidates. Maximal degree in co-relation 5369. Up to 2265 conditions per place. [2023-11-19 07:35:19,391 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-19 07:35:19,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 238 flow [2023-11-19 07:35:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-19 07:35:19,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-11-19 07:35:19,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-19 07:35:19,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-19 07:35:19,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:19,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-19 07:35:19,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,401 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 120 flow. Second operand 3 states and 420 transitions. [2023-11-19 07:35:19,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 238 flow [2023-11-19 07:35:19,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:19,406 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 118 flow [2023-11-19 07:35:19,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-19 07:35:19,410 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-19 07:35:19,411 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 118 flow [2023-11-19 07:35:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:35:19,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:35:19,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:19,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2109907495, now seen corresponding path program 1 times [2023-11-19 07:35:19,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:19,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877636843] [2023-11-19 07:35:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:19,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877636843] [2023-11-19 07:35:19,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877636843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439923418] [2023-11-19 07:35:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:19,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:19,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:35:19,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:19,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:35:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439923418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:19,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:35:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106965852] [2023-11-19 07:35:19,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:19,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:19,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 285 [2023-11-19 07:35:19,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 123.875) internal successors, (991), 8 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:19,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 285 [2023-11-19 07:35:19,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:20,377 INFO L124 PetriNetUnfolderBase]: 1347/2295 cut-off events. [2023-11-19 07:35:20,377 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2023-11-19 07:35:20,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 2295 events. 1347/2295 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13636 event pairs, 100 based on Foata normal form. 7/2155 useless extension candidates. Maximal degree in co-relation 4270. Up to 1714 conditions per place. [2023-11-19 07:35:20,397 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 64 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-11-19 07:35:20,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 322 flow [2023-11-19 07:35:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-11-19 07:35:20,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47789473684210526 [2023-11-19 07:35:20,401 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-11-19 07:35:20,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-11-19 07:35:20,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:20,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-11-19 07:35:20,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,410 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,410 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 118 flow. Second operand 5 states and 681 transitions. [2023-11-19 07:35:20,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 322 flow [2023-11-19 07:35:20,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:20,419 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 118 flow [2023-11-19 07:35:20,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-11-19 07:35:20,421 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-19 07:35:20,421 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 118 flow [2023-11-19 07:35:20,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.875) internal successors, (991), 8 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:20,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:35:20,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:20,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:20,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1466818616, now seen corresponding path program 1 times [2023-11-19 07:35:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285296417] [2023-11-19 07:35:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:20,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:20,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:20,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:20,683 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:20,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:35:20,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:35:20,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:35:20,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:35:20,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:35:20,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:35:20,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:35:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:35:20,685 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:35:20,686 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:20,686 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:35:20,720 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:35:20,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,793 INFO L124 PetriNetUnfolderBase]: 54/443 cut-off events. [2023-11-19 07:35:20,793 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:35:20,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 443 events. 54/443 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1617 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 295. Up to 16 conditions per place. [2023-11-19 07:35:20,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:20,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 399 flow [2023-11-19 07:35:20,864 INFO L124 PetriNetUnfolderBase]: 54/443 cut-off events. [2023-11-19 07:35:20,864 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:35:20,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 443 events. 54/443 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1617 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 295. Up to 16 conditions per place. [2023-11-19 07:35:20,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 15288 [2023-11-19 07:35:24,899 INFO L134 LiptonReduction]: Checked pairs total: 42297 [2023-11-19 07:35:24,900 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-19 07:35:24,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:24,910 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;@2f0a1874, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:24,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:35:24,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:24,912 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:35:24,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:24,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:24,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:24,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:24,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 37141, now seen corresponding path program 1 times [2023-11-19 07:35:24,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:24,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840125402] [2023-11-19 07:35:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840125402] [2023-11-19 07:35:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840125402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:24,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004465292] [2023-11-19 07:35:24,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:24,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 330 [2023-11-19 07:35:24,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 80 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:24,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:24,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 330 [2023-11-19 07:35:24,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:30,521 INFO L124 PetriNetUnfolderBase]: 30712/45491 cut-off events. [2023-11-19 07:35:30,521 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2023-11-19 07:35:30,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89511 conditions, 45491 events. 30712/45491 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 320086 event pairs, 25801 based on Foata normal form. 9142/48617 useless extension candidates. Maximal degree in co-relation 21268. Up to 36562 conditions per place. [2023-11-19 07:35:30,779 INFO L140 encePairwiseOnDemand]: 304/330 looper letters, 66 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-11-19 07:35:30,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 327 flow [2023-11-19 07:35:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-11-19 07:35:30,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535353535353535 [2023-11-19 07:35:30,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-11-19 07:35:30,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-11-19 07:35:30,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:30,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-11-19 07:35:30,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:30,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:30,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:30,790 INFO L175 Difference]: Start difference. First operand has 63 places, 80 transitions, 187 flow. Second operand 3 states and 548 transitions. [2023-11-19 07:35:30,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 327 flow [2023-11-19 07:35:30,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:30,795 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 143 flow [2023-11-19 07:35:30,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-19 07:35:30,796 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-19 07:35:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 143 flow [2023-11-19 07:35:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:30,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:30,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:35:30,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:30,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash 37139, now seen corresponding path program 1 times [2023-11-19 07:35:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:30,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51702493] [2023-11-19 07:35:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:30,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51702493] [2023-11-19 07:35:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51702493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:30,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474930996] [2023-11-19 07:35:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 330 [2023-11-19 07:35:30,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 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) [2023-11-19 07:35:30,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:30,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 330 [2023-11-19 07:35:30,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:34,869 INFO L124 PetriNetUnfolderBase]: 28311/42507 cut-off events. [2023-11-19 07:35:34,869 INFO L125 PetriNetUnfolderBase]: For 1827/1827 co-relation queries the response was YES. [2023-11-19 07:35:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84122 conditions, 42507 events. 28311/42507 cut-off events. For 1827/1827 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 298705 event pairs, 18305 based on Foata normal form. 0/38663 useless extension candidates. Maximal degree in co-relation 76151. Up to 39945 conditions per place. [2023-11-19 07:35:35,173 INFO L140 encePairwiseOnDemand]: 326/330 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:35:35,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 271 flow [2023-11-19 07:35:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-11-19 07:35:35,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2023-11-19 07:35:35,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-11-19 07:35:35,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-11-19 07:35:35,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:35,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-11-19 07:35:35,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,184 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 143 flow. Second operand 3 states and 500 transitions. [2023-11-19 07:35:35,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 271 flow [2023-11-19 07:35:35,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:35,340 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 153 flow [2023-11-19 07:35:35,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-19 07:35:35,342 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-19 07:35:35,342 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 153 flow [2023-11-19 07:35:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 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) [2023-11-19 07:35:35,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:35,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:35:35,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:35:35,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:35,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -30029948, now seen corresponding path program 1 times [2023-11-19 07:35:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:35,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789008543] [2023-11-19 07:35:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789008543] [2023-11-19 07:35:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789008543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175656023] [2023-11-19 07:35:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:35,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:35,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:35,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:35,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:35:35,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:35,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:35:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:35,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:35,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175656023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:35,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:35,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:35:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103697655] [2023-11-19 07:35:35,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:35,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 330 [2023-11-19 07:35:35,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 145.875) internal successors, (1167), 8 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:35,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 330 [2023-11-19 07:35:35,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:37,046 INFO L124 PetriNetUnfolderBase]: 5560/8977 cut-off events. [2023-11-19 07:35:37,046 INFO L125 PetriNetUnfolderBase]: For 3483/3483 co-relation queries the response was YES. [2023-11-19 07:35:37,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18185 conditions, 8977 events. 5560/8977 cut-off events. For 3483/3483 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 58705 event pairs, 630 based on Foata normal form. 819/9778 useless extension candidates. Maximal degree in co-relation 2075. Up to 5346 conditions per place. [2023-11-19 07:35:37,107 INFO L140 encePairwiseOnDemand]: 326/330 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-19 07:35:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 382 flow [2023-11-19 07:35:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-11-19 07:35:37,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813131313131313 [2023-11-19 07:35:37,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-11-19 07:35:37,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-11-19 07:35:37,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:37,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-11-19 07:35:37,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,134 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,134 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 153 flow. Second operand 6 states and 953 transitions. [2023-11-19 07:35:37,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 382 flow [2023-11-19 07:35:37,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 378 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:37,145 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-19 07:35:37,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-19 07:35:37,146 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-19 07:35:37,146 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-19 07:35:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.875) internal successors, (1167), 8 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:37,147 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:35:37,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:35:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c97b710a-9ad1-4af9-a62b-db69f3d9fe26/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:35:37,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:37,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1577479122, now seen corresponding path program 1 times [2023-11-19 07:35:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389567841] [2023-11-19 07:35:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:37,378 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:37,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:37,403 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:37,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:35:37,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:35:37,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:35:37,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:35:37,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:35:37,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:35:37,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:35:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:35:37,405 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:35:37,406 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:37,406 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:35:37,440 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:35:37,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,540 INFO L124 PetriNetUnfolderBase]: 86/691 cut-off events. [2023-11-19 07:35:37,540 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:35:37,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 691 events. 86/691 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2944 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 463. Up to 32 conditions per place. [2023-11-19 07:35:37,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:37,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 216 transitions, 472 flow [2023-11-19 07:35:37,652 INFO L124 PetriNetUnfolderBase]: 86/691 cut-off events. [2023-11-19 07:35:37,653 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:35:37,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 691 events. 86/691 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2944 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 463. Up to 32 conditions per place. [2023-11-19 07:35:37,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 23856 [2023-11-19 07:35:41,692 INFO L134 LiptonReduction]: Checked pairs total: 69159 [2023-11-19 07:35:41,692 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-11-19 07:35:41,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:41,694 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;@2f0a1874, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:41,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:35:41,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:41,696 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:35:41,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:41,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:41,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:35:41,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:35:41,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash 50091, now seen corresponding path program 1 times [2023-11-19 07:35:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:41,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889528866] [2023-11-19 07:35:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:41,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:41,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889528866] [2023-11-19 07:35:41,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889528866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:41,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:41,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943846390] [2023-11-19 07:35:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:41,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:41,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 375 [2023-11-19 07:35:41,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 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) [2023-11-19 07:35:41,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:41,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 375 [2023-11-19 07:35:41,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand