./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_power.opt.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_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/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_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/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_a223848a-9286-424b-8028-8bc9ee6ea96c/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 be536b3b382c4e63adbabc11deb06983f35dbd290b78e0d42f1a068990873986 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:17,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:18,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:58:18,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:18,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:18,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:18,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:18,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:18,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:18,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:18,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:18,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:18,115 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:18,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:18,117 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:18,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:18,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:18,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:18,119 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:58:18,119 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:58:18,119 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:58:18,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:18,120 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:58:18,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:58:18,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:18,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:18,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:18,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:18,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:18,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:18,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:18,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:18,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:18,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:18,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:18,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:18,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:18,127 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:18,127 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_a223848a-9286-424b-8028-8bc9ee6ea96c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be536b3b382c4e63adbabc11deb06983f35dbd290b78e0d42f1a068990873986 [2023-11-19 07:58:18,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:18,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:18,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:18,495 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:18,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:18,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-wmm/safe009_power.opt.i [2023-11-19 07:58:21,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:21,977 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:21,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/sv-benchmarks/c/pthread-wmm/safe009_power.opt.i [2023-11-19 07:58:21,996 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/data/78ceccae3/4a38853237d6454b979403385b65f2d3/FLAGbcbf990bf [2023-11-19 07:58:22,012 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/data/78ceccae3/4a38853237d6454b979403385b65f2d3 [2023-11-19 07:58:22,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:22,016 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:22,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:22,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:22,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:22,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d3ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22, skipping insertion in model container [2023-11-19 07:58:22,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:22,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:22,620 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:22,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:22,788 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:58:22,789 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:58:22,797 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:22,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22 WrapperNode [2023-11-19 07:58:22,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:22,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:22,799 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:22,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:22,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,907 INFO L138 Inliner]: procedures = 176, calls = 72, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 185 [2023-11-19 07:58:22,908 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:22,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:22,909 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:22,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:22,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,951 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:22,991 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:22,992 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:22,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:22,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:22,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (1/1) ... [2023-11-19 07:58:23,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:23,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:23,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a223848a-9286-424b-8028-8bc9ee6ea96c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:58:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-19 07:58:23,088 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-19 07:58:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-19 07:58:23,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-19 07:58:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-19 07:58:23,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-19 07:58:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:58:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:58:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:23,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:23,094 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 07:58:23,289 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:23,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:24,008 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:24,817 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:24,818 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:58:24,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:24 BoogieIcfgContainer [2023-11-19 07:58:24,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:24,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:24,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:24,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:24,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:22" (1/3) ... [2023-11-19 07:58:24,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6850171b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:24, skipping insertion in model container [2023-11-19 07:58:24,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:22" (2/3) ... [2023-11-19 07:58:24,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6850171b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:24, skipping insertion in model container [2023-11-19 07:58:24,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:24" (3/3) ... [2023-11-19 07:58:24,832 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.opt.i [2023-11-19 07:58:24,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:24,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-11-19 07:58:24,855 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:58:25,138 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:58:25,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 232 transitions, 476 flow [2023-11-19 07:58:25,355 INFO L124 PetriNetUnfolderBase]: 58/229 cut-off events. [2023-11-19 07:58:25,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 58/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 340 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2023-11-19 07:58:25,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 232 transitions, 476 flow [2023-11-19 07:58:25,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 229 transitions, 467 flow [2023-11-19 07:58:25,393 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:58:25,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 229 transitions, 467 flow [2023-11-19 07:58:25,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 229 transitions, 467 flow [2023-11-19 07:58:25,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 229 transitions, 467 flow [2023-11-19 07:58:25,565 INFO L124 PetriNetUnfolderBase]: 58/229 cut-off events. [2023-11-19 07:58:25,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:25,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 58/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 340 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2023-11-19 07:58:25,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 16954 [2023-11-19 07:58:40,125 INFO L134 LiptonReduction]: Checked pairs total: 40967 [2023-11-19 07:58:40,125 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-11-19 07:58:40,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:40,149 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;@37514794, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:40,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-19 07:58:40,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:58:40,152 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:58:40,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:58:40,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:58:40,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1398, now seen corresponding path program 1 times [2023-11-19 07:58:40,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66250194] [2023-11-19 07:58:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,303 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 07:58:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66250194] [2023-11-19 07:58:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66250194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:40,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:58:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413583846] [2023-11-19 07:58:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:58:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:58:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:58:40,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 496 [2023-11-19 07:58:40,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 153 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:40,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:40,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 496 [2023-11-19 07:58:40,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:48,015 INFO L124 PetriNetUnfolderBase]: 31868/44217 cut-off events. [2023-11-19 07:58:48,016 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-19 07:58:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88643 conditions, 44217 events. 31868/44217 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3264. Compared 298575 event pairs, 31868 based on Foata normal form. 0/18261 useless extension candidates. Maximal degree in co-relation 88632. Up to 44200 conditions per place. [2023-11-19 07:58:48,317 INFO L140 encePairwiseOnDemand]: 473/496 looper letters, 47 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-11-19 07:58:48,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 199 flow [2023-11-19 07:58:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:58:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:58:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 326 transitions. [2023-11-19 07:58:48,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3286290322580645 [2023-11-19 07:58:48,340 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 326 transitions. [2023-11-19 07:58:48,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 326 transitions. [2023-11-19 07:58:48,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:48,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 326 transitions. [2023-11-19 07:58:48,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 163.0) internal successors, (326), 2 states have internal predecessors, (326), 0 states have call successors, (0), 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 07:58:48,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 496.0) internal successors, (1488), 3 states have internal predecessors, (1488), 0 states have call successors, (0), 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 07:58:48,361 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 496.0) internal successors, (1488), 3 states have internal predecessors, (1488), 0 states have call successors, (0), 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 07:58:48,363 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 153 flow. Second operand 2 states and 326 transitions. [2023-11-19 07:58:48,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 199 flow [2023-11-19 07:58:48,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:48,384 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 102 flow [2023-11-19 07:58:48,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-19 07:58:48,391 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -23 predicate places. [2023-11-19 07:58:48,391 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 102 flow [2023-11-19 07:58:48,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:48,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:48,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:58:48,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:58:48,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:58:48,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 42773190, now seen corresponding path program 1 times [2023-11-19 07:58:48,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:48,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44576842] [2023-11-19 07:58:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:48,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:48,996 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 07:58:48,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44576842] [2023-11-19 07:58:48,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44576842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:48,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:48,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359235722] [2023-11-19 07:58:48,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:48,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:48,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:49,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 496 [2023-11-19 07:58:49,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 07:58:49,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:49,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 496 [2023-11-19 07:58:49,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:55,705 INFO L124 PetriNetUnfolderBase]: 28558/39660 cut-off events. [2023-11-19 07:58:55,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:55,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79519 conditions, 39660 events. 28558/39660 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2900. Compared 295931 event pairs, 5388 based on Foata normal form. 0/16924 useless extension candidates. Maximal degree in co-relation 79516. Up to 31802 conditions per place. [2023-11-19 07:58:55,969 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 80 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-19 07:58:55,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 340 flow [2023-11-19 07:58:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-19 07:58:55,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2023-11-19 07:58:55,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-19 07:58:55,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-19 07:58:55,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:55,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-19 07:58:55,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 07:58:55,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 0 states have call successors, (0), 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 07:58:55,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 0 states have call successors, (0), 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 07:58:55,991 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 102 flow. Second operand 3 states and 464 transitions. [2023-11-19 07:58:55,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 340 flow [2023-11-19 07:58:55,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:58:55,996 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 104 flow [2023-11-19 07:58:55,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-11-19 07:58:55,998 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -22 predicate places. [2023-11-19 07:58:55,999 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 104 flow [2023-11-19 07:58:56,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 07:58:56,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:56,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:58:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:58:56,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:58:56,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1325976969, now seen corresponding path program 1 times [2023-11-19 07:58:56,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760576010] [2023-11-19 07:58:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:56,197 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 07:58:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:56,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760576010] [2023-11-19 07:58:56,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760576010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:56,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:56,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105215703] [2023-11-19 07:58:56,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:56,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:56,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:56,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 496 [2023-11-19 07:58:56,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 07:58:56,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:56,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 496 [2023-11-19 07:58:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:03,658 INFO L124 PetriNetUnfolderBase]: 36763/50969 cut-off events. [2023-11-19 07:59:03,659 INFO L125 PetriNetUnfolderBase]: For 1231/1231 co-relation queries the response was YES. [2023-11-19 07:59:03,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103393 conditions, 50969 events. 36763/50969 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 3856. Compared 365315 event pairs, 23433 based on Foata normal form. 0/21417 useless extension candidates. Maximal degree in co-relation 103389. Up to 38760 conditions per place. [2023-11-19 07:59:03,995 INFO L140 encePairwiseOnDemand]: 488/496 looper letters, 79 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-11-19 07:59:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 356 flow [2023-11-19 07:59:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-11-19 07:59:04,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-19 07:59:04,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-11-19 07:59:04,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-11-19 07:59:04,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:04,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-11-19 07:59:04,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 07:59:04,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 0 states have call successors, (0), 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 07:59:04,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 0 states have call successors, (0), 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 07:59:04,016 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 104 flow. Second operand 3 states and 465 transitions. [2023-11-19 07:59:04,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 356 flow [2023-11-19 07:59:04,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:59:04,021 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 142 flow [2023-11-19 07:59:04,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-19 07:59:04,023 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -21 predicate places. [2023-11-19 07:59:04,024 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 142 flow [2023-11-19 07:59:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 07:59:04,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:04,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:59:04,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:59:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1325977191, now seen corresponding path program 1 times [2023-11-19 07:59:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891363082] [2023-11-19 07:59:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:04,257 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 07:59:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891363082] [2023-11-19 07:59:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891363082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:04,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887946832] [2023-11-19 07:59:04,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:04,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 496 [2023-11-19 07:59:04,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:04,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:04,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 496 [2023-11-19 07:59:04,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:08,204 INFO L124 PetriNetUnfolderBase]: 17391/24473 cut-off events. [2023-11-19 07:59:08,205 INFO L125 PetriNetUnfolderBase]: For 5052/5057 co-relation queries the response was YES. [2023-11-19 07:59:08,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56508 conditions, 24473 events. 17391/24473 cut-off events. For 5052/5057 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 158087 event pairs, 5128 based on Foata normal form. 4/16748 useless extension candidates. Maximal degree in co-relation 56503. Up to 13571 conditions per place. [2023-11-19 07:59:08,347 INFO L140 encePairwiseOnDemand]: 481/496 looper letters, 89 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-19 07:59:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 94 transitions, 449 flow [2023-11-19 07:59:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:59:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-11-19 07:59:08,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29788306451612906 [2023-11-19 07:59:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-11-19 07:59:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-11-19 07:59:08,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:08,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-11-19 07:59:08,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 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 07:59:08,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 0 states have call successors, (0), 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 07:59:08,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 0 states have call successors, (0), 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 07:59:08,366 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 142 flow. Second operand 4 states and 591 transitions. [2023-11-19 07:59:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 94 transitions, 449 flow [2023-11-19 07:59:08,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:08,426 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 183 flow [2023-11-19 07:59:08,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-19 07:59:08,429 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -19 predicate places. [2023-11-19 07:59:08,429 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 183 flow [2023-11-19 07:59:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:08,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:08,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:08,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:59:08,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:59:08,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1325977252, now seen corresponding path program 1 times [2023-11-19 07:59:08,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:08,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348441842] [2023-11-19 07:59:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:08,697 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 07:59:08,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:08,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348441842] [2023-11-19 07:59:08,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348441842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800691498] [2023-11-19 07:59:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:08,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:08,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 496 [2023-11-19 07:59:08,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 07:59:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 496 [2023-11-19 07:59:08,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:10,066 INFO L124 PetriNetUnfolderBase]: 4951/7131 cut-off events. [2023-11-19 07:59:10,066 INFO L125 PetriNetUnfolderBase]: For 4978/4991 co-relation queries the response was YES. [2023-11-19 07:59:10,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19715 conditions, 7131 events. 4951/7131 cut-off events. For 4978/4991 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39027 event pairs, 2440 based on Foata normal form. 2621/8744 useless extension candidates. Maximal degree in co-relation 19708. Up to 5691 conditions per place. [2023-11-19 07:59:10,106 INFO L140 encePairwiseOnDemand]: 483/496 looper letters, 63 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-19 07:59:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 361 flow [2023-11-19 07:59:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:59:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-11-19 07:59:10,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2908266129032258 [2023-11-19 07:59:10,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-11-19 07:59:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-11-19 07:59:10,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:10,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-11-19 07:59:10,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 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 07:59:10,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 0 states have call successors, (0), 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 07:59:10,127 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 0 states have call successors, (0), 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 07:59:10,127 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 183 flow. Second operand 4 states and 577 transitions. [2023-11-19 07:59:10,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 361 flow [2023-11-19 07:59:10,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:10,131 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 167 flow [2023-11-19 07:59:10,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-11-19 07:59:10,135 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -25 predicate places. [2023-11-19 07:59:10,135 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 167 flow [2023-11-19 07:59:10,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 07:59:10,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:10,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:10,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:59:10,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0ASSERT_VIOLATIONMEMORY_LEAK, P0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-19 07:59:10,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash -202969233, now seen corresponding path program 1 times [2023-11-19 07:59:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:10,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449231901] [2023-11-19 07:59:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:10,340 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 07:59:10,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449231901] [2023-11-19 07:59:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449231901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:10,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402669844] [2023-11-19 07:59:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:10,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 496 [2023-11-19 07:59:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 07:59:10,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:10,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 496 [2023-11-19 07:59:10,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand