./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI --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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:06:34,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:06:34,337 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:06:34,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:06:34,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:06:34,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:06:34,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:06:34,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:06:34,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:06:34,373 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:06:34,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:06:34,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:06:34,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:06:34,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:06:34,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:06:34,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:06:34,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:06:34,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:06:34,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:06:34,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:06:34,380 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:06:34,381 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:06:34,382 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:06:34,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:06:34,383 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:06:34,384 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:06:34,384 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:06:34,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:06:34,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:06:34,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:06:34,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:06:34,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:06:34,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:34,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:06:34,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:06:34,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:06:34,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:06:34,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:06:34,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:06:34,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:06:34,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:06:34,392 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_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2023-11-24 22:06:34,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:06:34,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:06:34,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:06:34,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:06:34,681 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:06:34,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-24 22:06:37,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:06:38,085 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:06:38,090 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-24 22:06:38,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/data/9ad6dde1a/33f560129499491e8bf7f0f970986c7c/FLAGfbd598282 [2023-11-24 22:06:38,127 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/data/9ad6dde1a/33f560129499491e8bf7f0f970986c7c [2023-11-24 22:06:38,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:06:38,131 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:06:38,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:38,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:06:38,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:06:38,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38, skipping insertion in model container [2023-11-24 22:06:38,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,202 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:06:38,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:38,611 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:06:38,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:38,744 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:06:38,745 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:06:38,753 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:06:38,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38 WrapperNode [2023-11-24 22:06:38,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:38,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:38,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:06:38,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:06:38,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,829 INFO L138 Inliner]: procedures = 169, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-11-24 22:06:38,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:38,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:06:38,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:06:38,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:06:38,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,851 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,864 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-24 22:06:38,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,880 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:06:38,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:06:38,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:06:38,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:06:38,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (1/1) ... [2023-11-24 22:06:38,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:38,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:38,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:06:38,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb1e413-0c3f-4f29-8805-8b849aa72977/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:06:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 22:06:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 22:06:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:06:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:06:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:06:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:06:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:06:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:06:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:06:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:06:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:06:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:06:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:06:38,966 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:06:39,112 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:06:39,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:06:39,291 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:06:39,369 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:06:39,369 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:06:39,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:39 BoogieIcfgContainer [2023-11-24 22:06:39,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:06:39,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:06:39,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:06:39,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:06:39,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:06:38" (1/3) ... [2023-11-24 22:06:39,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a80bac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:39, skipping insertion in model container [2023-11-24 22:06:39,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:38" (2/3) ... [2023-11-24 22:06:39,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a80bac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:39, skipping insertion in model container [2023-11-24 22:06:39,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:39" (3/3) ... [2023-11-24 22:06:39,379 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-11-24 22:06:39,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:06:39,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 22:06:39,401 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:06:39,438 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:06:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 17 transitions, 38 flow [2023-11-24 22:06:39,505 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2023-11-24 22:06:39,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:39,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-24 22:06:39,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 17 transitions, 38 flow [2023-11-24 22:06:39,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 17 transitions, 38 flow [2023-11-24 22:06:39,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:39,531 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:39,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 22:06:39,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:39,536 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:06:39,537 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:39,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:39,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:39,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:06:39,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 144599, now seen corresponding path program 1 times [2023-11-24 22:06:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109874632] [2023-11-24 22:06:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109874632] [2023-11-24 22:06:39,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109874632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:39,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:39,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106031127] [2023-11-24 22:06:39,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:39,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 17 [2023-11-24 22:06:39,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:39,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:39,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 17 [2023-11-24 22:06:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:39,987 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-11-24 22:06:39,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:39,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 40 events. 9/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 116 event pairs, 9 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 55. Up to 28 conditions per place. [2023-11-24 22:06:39,991 INFO L140 encePairwiseOnDemand]: 14/17 looper letters, 7 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-11-24 22:06:39,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 46 flow [2023-11-24 22:06:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-24 22:06:40,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-11-24 22:06:40,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-24 22:06:40,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-24 22:06:40,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-24 22:06:40,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,019 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 38 flow. Second operand 3 states and 28 transitions. [2023-11-24 22:06:40,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 46 flow [2023-11-24 22:06:40,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:40,025 INFO L231 Difference]: Finished difference. Result has 18 places, 13 transitions, 32 flow [2023-11-24 22:06:40,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=18, PETRI_TRANSITIONS=13} [2023-11-24 22:06:40,032 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -2 predicate places. [2023-11-24 22:06:40,033 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 13 transitions, 32 flow [2023-11-24 22:06:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:06:40,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:06:40,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 144600, now seen corresponding path program 1 times [2023-11-24 22:06:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670801631] [2023-11-24 22:06:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670801631] [2023-11-24 22:06:40,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670801631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:40,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:40,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141987620] [2023-11-24 22:06:40,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 17 [2023-11-24 22:06:40,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 17 [2023-11-24 22:06:40,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,210 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2023-11-24 22:06:40,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:40,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 35 events. 9/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 97 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 63. Up to 28 conditions per place. [2023-11-24 22:06:40,211 INFO L140 encePairwiseOnDemand]: 15/17 looper letters, 7 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-11-24 22:06:40,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 12 transitions, 46 flow [2023-11-24 22:06:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2023-11-24 22:06:40,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-11-24 22:06:40,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 27 transitions. [2023-11-24 22:06:40,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 27 transitions. [2023-11-24 22:06:40,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 27 transitions. [2023-11-24 22:06:40,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,217 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 3 states and 27 transitions. [2023-11-24 22:06:40,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 12 transitions, 46 flow [2023-11-24 22:06:40,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 12 transitions, 45 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:40,219 INFO L231 Difference]: Finished difference. Result has 18 places, 12 transitions, 31 flow [2023-11-24 22:06:40,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=12} [2023-11-24 22:06:40,220 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -2 predicate places. [2023-11-24 22:06:40,220 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions, 31 flow [2023-11-24 22:06:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:06:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:06:40,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:06:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,223 INFO L85 PathProgramCache]: Analyzing trace with hash 12876617, now seen corresponding path program 1 times [2023-11-24 22:06:40,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797697279] [2023-11-24 22:06:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:40,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797697279] [2023-11-24 22:06:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797697279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:40,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:40,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:40,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139155651] [2023-11-24 22:06:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:40,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:40,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 17 [2023-11-24 22:06:40,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions, 31 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:40,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 17 [2023-11-24 22:06:40,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,378 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-24 22:06:40,378 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:06:40,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 27 events. 6/27 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 2 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 47. Up to 11 conditions per place. [2023-11-24 22:06:40,379 INFO L140 encePairwiseOnDemand]: 14/17 looper letters, 7 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-11-24 22:06:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 51 flow [2023-11-24 22:06:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2023-11-24 22:06:40,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2023-11-24 22:06:40,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 31 transitions. [2023-11-24 22:06:40,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 31 transitions. [2023-11-24 22:06:40,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 31 transitions. [2023-11-24 22:06:40,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,384 INFO L175 Difference]: Start difference. First operand has 18 places, 12 transitions, 31 flow. Second operand 3 states and 31 transitions. [2023-11-24 22:06:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 51 flow [2023-11-24 22:06:40,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:40,386 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 32 flow [2023-11-24 22:06:40,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2023-11-24 22:06:40,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -2 predicate places. [2023-11-24 22:06:40,388 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 32 flow [2023-11-24 22:06:40,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 22:06:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:06:40,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:06:40,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash -510514676, now seen corresponding path program 1 times [2023-11-24 22:06:40,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591956271] [2023-11-24 22:06:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:40,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:06:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:40,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:06:40,445 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:06:40,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-24 22:06:40,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-24 22:06:40,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-24 22:06:40,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-24 22:06:40,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-24 22:06:40,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-24 22:06:40,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:06:40,451 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 22:06:40,454 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:06:40,455 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 22:06:40,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:06:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 58 flow [2023-11-24 22:06:40,487 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2023-11-24 22:06:40,487 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:06:40,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 39 events. 0/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 101 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-11-24 22:06:40,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 24 transitions, 58 flow [2023-11-24 22:06:40,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 58 flow [2023-11-24 22:06:40,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:40,493 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:40,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 22:06:40,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:40,496 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:06:40,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:40,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:40,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:06:40,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash 168431, now seen corresponding path program 1 times [2023-11-24 22:06:40,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286659666] [2023-11-24 22:06:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:40,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286659666] [2023-11-24 22:06:40,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286659666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:40,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:40,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:40,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013724169] [2023-11-24 22:06:40,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:40,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:40,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:40,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 24 [2023-11-24 22:06:40,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:40,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 24 [2023-11-24 22:06:40,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,630 INFO L124 PetriNetUnfolderBase]: 93/228 cut-off events. [2023-11-24 22:06:40,631 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 22:06:40,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 228 events. 93/228 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1222 event pairs, 93 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 120. Up to 176 conditions per place. [2023-11-24 22:06:40,637 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-24 22:06:40,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 74 flow [2023-11-24 22:06:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2023-11-24 22:06:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2023-11-24 22:06:40,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 41 transitions. [2023-11-24 22:06:40,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 41 transitions. [2023-11-24 22:06:40,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 41 transitions. [2023-11-24 22:06:40,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,642 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 58 flow. Second operand 3 states and 41 transitions. [2023-11-24 22:06:40,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 74 flow [2023-11-24 22:06:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:40,645 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 52 flow [2023-11-24 22:06:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-11-24 22:06:40,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-24 22:06:40,646 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 52 flow [2023-11-24 22:06:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:40,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:40,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:06:40,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 168432, now seen corresponding path program 1 times [2023-11-24 22:06:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608948696] [2023-11-24 22:06:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:40,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608948696] [2023-11-24 22:06:40,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608948696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:40,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:40,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453619600] [2023-11-24 22:06:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:40,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 24 [2023-11-24 22:06:40,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:40,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 24 [2023-11-24 22:06:40,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,777 INFO L124 PetriNetUnfolderBase]: 66/180 cut-off events. [2023-11-24 22:06:40,777 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-24 22:06:40,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 180 events. 66/180 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 912 event pairs, 66 based on Foata normal form. 21/159 useless extension candidates. Maximal degree in co-relation 320. Up to 128 conditions per place. [2023-11-24 22:06:40,781 INFO L140 encePairwiseOnDemand]: 22/24 looper letters, 10 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-24 22:06:40,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 72 flow [2023-11-24 22:06:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-24 22:06:40,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 22:06:40,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-24 22:06:40,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-24 22:06:40,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-24 22:06:40,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,786 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 3 states and 42 transitions. [2023-11-24 22:06:40,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 72 flow [2023-11-24 22:06:40,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:40,789 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2023-11-24 22:06:40,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-11-24 22:06:40,790 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-24 22:06:40,790 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2023-11-24 22:06:40,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:06:40,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:06:40,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:06:40,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 722885519, now seen corresponding path program 1 times [2023-11-24 22:06:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028705633] [2023-11-24 22:06:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028705633] [2023-11-24 22:06:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028705633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:40,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:40,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:40,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420379532] [2023-11-24 22:06:40,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:40,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:40,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 24 [2023-11-24 22:06:40,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:40,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 24 [2023-11-24 22:06:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:40,927 INFO L124 PetriNetUnfolderBase]: 80/171 cut-off events. [2023-11-24 22:06:40,928 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-24 22:06:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 171 events. 80/171 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 652 event pairs, 24 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 337. Up to 123 conditions per place. [2023-11-24 22:06:40,931 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 17 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-11-24 22:06:40,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 110 flow [2023-11-24 22:06:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-24 22:06:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2023-11-24 22:06:40,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-24 22:06:40,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-24 22:06:40,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:40,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-24 22:06:40,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,943 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 51 flow. Second operand 3 states and 49 transitions. [2023-11-24 22:06:40,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 110 flow [2023-11-24 22:06:40,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:40,946 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 71 flow [2023-11-24 22:06:40,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-24 22:06:40,949 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-11-24 22:06:40,950 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 71 flow [2023-11-24 22:06:40,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:40,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:40,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 22:06:40,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:06:40,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:06:40,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash -339631164, now seen corresponding path program 1 times [2023-11-24 22:06:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170501204] [2023-11-24 22:06:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:41,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:06:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:41,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:06:41,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:06:41,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 22:06:41,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-24 22:06:41,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 22:06:41,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 22:06:41,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-24 22:06:41,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-24 22:06:41,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 22:06:41,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:06:41,053 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 22:06:41,054 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:06:41,055 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 22:06:41,090 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:06:41,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 80 flow [2023-11-24 22:06:41,112 INFO L124 PetriNetUnfolderBase]: 0/54 cut-off events. [2023-11-24 22:06:41,113 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 22:06:41,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 0/54 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 132 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-24 22:06:41,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 80 flow [2023-11-24 22:06:41,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 80 flow [2023-11-24 22:06:41,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:41,129 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:41,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-24 22:06:41,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:41,136 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:06:41,136 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:41,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:41,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:41,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:06:41,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 199214, now seen corresponding path program 1 times [2023-11-24 22:06:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:41,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516967668] [2023-11-24 22:06:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:41,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516967668] [2023-11-24 22:06:41,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516967668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:41,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:41,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:41,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396668987] [2023-11-24 22:06:41,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:41,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:41,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:41,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2023-11-24 22:06:41,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:41,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2023-11-24 22:06:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:41,447 INFO L124 PetriNetUnfolderBase]: 621/1172 cut-off events. [2023-11-24 22:06:41,447 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2023-11-24 22:06:41,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1172 events. 621/1172 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7671 event pairs, 621 based on Foata normal form. 0/882 useless extension candidates. Maximal degree in co-relation 423. Up to 960 conditions per place. [2023-11-24 22:06:41,464 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 15 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-24 22:06:41,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 104 flow [2023-11-24 22:06:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-24 22:06:41,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2023-11-24 22:06:41,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-24 22:06:41,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-24 22:06:41,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:41,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-24 22:06:41,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,469 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 80 flow. Second operand 3 states and 54 transitions. [2023-11-24 22:06:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 104 flow [2023-11-24 22:06:41,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 102 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:41,471 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 72 flow [2023-11-24 22:06:41,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-11-24 22:06:41,473 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-24 22:06:41,473 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 72 flow [2023-11-24 22:06:41,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:41,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:41,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:06:41,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:06:41,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 199215, now seen corresponding path program 1 times [2023-11-24 22:06:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:41,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168847721] [2023-11-24 22:06:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:41,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:41,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168847721] [2023-11-24 22:06:41,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168847721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:41,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:41,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023478729] [2023-11-24 22:06:41,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:41,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:41,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:41,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:41,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2023-11-24 22:06:41,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:41,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2023-11-24 22:06:41,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:41,697 INFO L124 PetriNetUnfolderBase]: 450/916 cut-off events. [2023-11-24 22:06:41,697 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2023-11-24 22:06:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 916 events. 450/916 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5970 event pairs, 450 based on Foata normal form. 85/768 useless extension candidates. Maximal degree in co-relation 1680. Up to 704 conditions per place. [2023-11-24 22:06:41,707 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-24 22:06:41,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 100 flow [2023-11-24 22:06:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-24 22:06:41,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2023-11-24 22:06:41,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-24 22:06:41,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-24 22:06:41,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:41,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-24 22:06:41,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,713 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 72 flow. Second operand 3 states and 55 transitions. [2023-11-24 22:06:41,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 100 flow [2023-11-24 22:06:41,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:41,717 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 71 flow [2023-11-24 22:06:41,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-11-24 22:06:41,725 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-24 22:06:41,725 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 71 flow [2023-11-24 22:06:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:41,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:06:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:06:41,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:06:41,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1639978421, now seen corresponding path program 1 times [2023-11-24 22:06:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:41,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652691594] [2023-11-24 22:06:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652691594] [2023-11-24 22:06:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652691594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:41,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724835423] [2023-11-24 22:06:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:41,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2023-11-24 22:06:41,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:41,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:41,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2023-11-24 22:06:41,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:41,996 INFO L124 PetriNetUnfolderBase]: 723/1152 cut-off events. [2023-11-24 22:06:41,997 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-24 22:06:41,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1152 events. 723/1152 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5584 event pairs, 245 based on Foata normal form. 0/983 useless extension candidates. Maximal degree in co-relation 2339. Up to 1028 conditions per place. [2023-11-24 22:06:42,008 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-11-24 22:06:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 157 flow [2023-11-24 22:06:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 22:06:42,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6881720430107527 [2023-11-24 22:06:42,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 22:06:42,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 22:06:42,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:42,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 22:06:42,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,016 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 71 flow. Second operand 3 states and 64 transitions. [2023-11-24 22:06:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 157 flow [2023-11-24 22:06:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:42,020 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-11-24 22:06:42,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-24 22:06:42,021 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-24 22:06:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-11-24 22:06:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:42,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:06:42,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:06:42,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash -719258102, now seen corresponding path program 1 times [2023-11-24 22:06:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544229798] [2023-11-24 22:06:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:06:42,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544229798] [2023-11-24 22:06:42,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544229798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:42,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:42,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008358273] [2023-11-24 22:06:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:42,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:42,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2023-11-24 22:06:42,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:42,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2023-11-24 22:06:42,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:42,279 INFO L124 PetriNetUnfolderBase]: 539/997 cut-off events. [2023-11-24 22:06:42,279 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2023-11-24 22:06:42,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2114 conditions, 997 events. 539/997 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5393 event pairs, 143 based on Foata normal form. 156/1137 useless extension candidates. Maximal degree in co-relation 2102. Up to 699 conditions per place. [2023-11-24 22:06:42,289 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 22 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-11-24 22:06:42,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 168 flow [2023-11-24 22:06:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-24 22:06:42,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2023-11-24 22:06:42,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-24 22:06:42,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-24 22:06:42,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:42,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-24 22:06:42,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,294 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 3 states and 61 transitions. [2023-11-24 22:06:42,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 168 flow [2023-11-24 22:06:42,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:42,298 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 105 flow [2023-11-24 22:06:42,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-24 22:06:42,299 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-24 22:06:42,300 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 105 flow [2023-11-24 22:06:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:42,300 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-24 22:06:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:06:42,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:06:42,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1486304009, now seen corresponding path program 1 times [2023-11-24 22:06:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461067114] [2023-11-24 22:06:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:42,333 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:06:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:42,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:06:42,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:06:42,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-24 22:06:42,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-24 22:06:42,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-24 22:06:42,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:06:42,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-24 22:06:42,349 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:06:42,350 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-24 22:06:42,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:06:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 38 transitions, 104 flow [2023-11-24 22:06:42,387 INFO L124 PetriNetUnfolderBase]: 0/69 cut-off events. [2023-11-24 22:06:42,388 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 22:06:42,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 69 events. 0/69 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 181 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-11-24 22:06:42,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 38 transitions, 104 flow [2023-11-24 22:06:42,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 104 flow [2023-11-24 22:06:42,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:42,394 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:42,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 22:06:42,395 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:42,395 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:06:42,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:42,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:42,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:42,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:06:42,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 236948, now seen corresponding path program 1 times [2023-11-24 22:06:42,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:42,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466147304] [2023-11-24 22:06:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:42,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:42,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:42,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466147304] [2023-11-24 22:06:42,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466147304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:42,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:42,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298843634] [2023-11-24 22:06:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:42,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2023-11-24 22:06:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2023-11-24 22:06:42,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:43,209 INFO L124 PetriNetUnfolderBase]: 3501/5716 cut-off events. [2023-11-24 22:06:43,209 INFO L125 PetriNetUnfolderBase]: For 1972/1972 co-relation queries the response was YES. [2023-11-24 22:06:43,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10984 conditions, 5716 events. 3501/5716 cut-off events. For 1972/1972 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41523 event pairs, 3501 based on Foata normal form. 0/4209 useless extension candidates. Maximal degree in co-relation 2231. Up to 4864 conditions per place. [2023-11-24 22:06:43,280 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-24 22:06:43,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 136 flow [2023-11-24 22:06:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-24 22:06:43,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2023-11-24 22:06:43,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-24 22:06:43,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-24 22:06:43,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:43,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-24 22:06:43,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:43,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:43,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:43,286 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 104 flow. Second operand 3 states and 67 transitions. [2023-11-24 22:06:43,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 136 flow [2023-11-24 22:06:43,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 34 transitions, 130 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:43,291 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 92 flow [2023-11-24 22:06:43,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-11-24 22:06:43,293 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-24 22:06:43,293 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 92 flow [2023-11-24 22:06:43,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:43,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:43,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:43,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 22:06:43,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:06:43,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:43,294 INFO L85 PathProgramCache]: Analyzing trace with hash 236949, now seen corresponding path program 1 times [2023-11-24 22:06:43,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:43,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200545851] [2023-11-24 22:06:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:43,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:43,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:43,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200545851] [2023-11-24 22:06:43,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200545851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:43,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:43,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:43,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063382423] [2023-11-24 22:06:43,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:43,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:43,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2023-11-24 22:06:43,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:43,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:43,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2023-11-24 22:06:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:44,123 INFO L124 PetriNetUnfolderBase]: 3501/5375 cut-off events. [2023-11-24 22:06:44,124 INFO L125 PetriNetUnfolderBase]: For 1620/1620 co-relation queries the response was YES. [2023-11-24 22:06:44,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10501 conditions, 5375 events. 3501/5375 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36652 event pairs, 3501 based on Foata normal form. 0/3868 useless extension candidates. Maximal degree in co-relation 10491. Up to 4864 conditions per place. [2023-11-24 22:06:44,189 INFO L140 encePairwiseOnDemand]: 36/38 looper letters, 19 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-24 22:06:44,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 130 flow [2023-11-24 22:06:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-24 22:06:44,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-24 22:06:44,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-24 22:06:44,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-24 22:06:44,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:44,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-24 22:06:44,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,194 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 92 flow. Second operand 3 states and 66 transitions. [2023-11-24 22:06:44,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 130 flow [2023-11-24 22:06:44,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:44,202 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 91 flow [2023-11-24 22:06:44,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-11-24 22:06:44,202 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-24 22:06:44,203 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 91 flow [2023-11-24 22:06:44,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:44,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:06:44,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 22:06:44,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:06:44,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1530811589, now seen corresponding path program 1 times [2023-11-24 22:06:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:44,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405931267] [2023-11-24 22:06:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405931267] [2023-11-24 22:06:44,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405931267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:44,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:44,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:44,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54701047] [2023-11-24 22:06:44,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:44,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2023-11-24 22:06:44,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2023-11-24 22:06:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:45,247 INFO L124 PetriNetUnfolderBase]: 5489/7638 cut-off events. [2023-11-24 22:06:45,248 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2023-11-24 22:06:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15600 conditions, 7638 events. 5489/7638 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 40181 event pairs, 2157 based on Foata normal form. 0/6276 useless extension candidates. Maximal degree in co-relation 15589. Up to 7338 conditions per place. [2023-11-24 22:06:45,453 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 31 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-24 22:06:45,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 204 flow [2023-11-24 22:06:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-24 22:06:45,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6929824561403509 [2023-11-24 22:06:45,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-24 22:06:45,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-24 22:06:45,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:45,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-24 22:06:45,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:45,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:45,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:45,457 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 91 flow. Second operand 3 states and 79 transitions. [2023-11-24 22:06:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 204 flow [2023-11-24 22:06:45,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:45,461 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 129 flow [2023-11-24 22:06:45,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-24 22:06:45,463 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-24 22:06:45,463 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 129 flow [2023-11-24 22:06:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:45,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:45,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 22:06:45,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:06:45,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2138875852, now seen corresponding path program 1 times [2023-11-24 22:06:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:45,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907471594] [2023-11-24 22:06:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:06:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:45,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907471594] [2023-11-24 22:06:45,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907471594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:45,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:45,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349476034] [2023-11-24 22:06:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:45,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:45,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2023-11-24 22:06:45,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:45,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:45,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2023-11-24 22:06:45,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:46,210 INFO L124 PetriNetUnfolderBase]: 3484/5564 cut-off events. [2023-11-24 22:06:46,212 INFO L125 PetriNetUnfolderBase]: For 1714/1714 co-relation queries the response was YES. [2023-11-24 22:06:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11634 conditions, 5564 events. 3484/5564 cut-off events. For 1714/1714 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35300 event pairs, 1101 based on Foata normal form. 1272/6683 useless extension candidates. Maximal degree in co-relation 11621. Up to 4192 conditions per place. [2023-11-24 22:06:46,272 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 28 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-24 22:06:46,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 218 flow [2023-11-24 22:06:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-24 22:06:46,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2023-11-24 22:06:46,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-24 22:06:46,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-24 22:06:46,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:46,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-24 22:06:46,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,276 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 129 flow. Second operand 3 states and 75 transitions. [2023-11-24 22:06:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 218 flow [2023-11-24 22:06:46,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:46,279 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 136 flow [2023-11-24 22:06:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-24 22:06:46,280 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-24 22:06:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 136 flow [2023-11-24 22:06:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:46,281 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 22:06:46,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:06:46,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash -695454821, now seen corresponding path program 1 times [2023-11-24 22:06:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015333669] [2023-11-24 22:06:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:46,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:46,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:06:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:46,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:06:46,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:06:46,327 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-24 22:06:46,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-24 22:06:46,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-24 22:06:46,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-24 22:06:46,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-24 22:06:46,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-24 22:06:46,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-24 22:06:46,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-24 22:06:46,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-24 22:06:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 22:06:46,329 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-24 22:06:46,330 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:06:46,331 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-24 22:06:46,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:06:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 45 transitions, 130 flow [2023-11-24 22:06:46,388 INFO L124 PetriNetUnfolderBase]: 0/84 cut-off events. [2023-11-24 22:06:46,388 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-24 22:06:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 84 events. 0/84 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-11-24 22:06:46,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 45 transitions, 130 flow [2023-11-24 22:06:46,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 45 transitions, 130 flow [2023-11-24 22:06:46,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:46,392 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:46,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-24 22:06:46,393 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:46,393 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:06:46,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:06:46,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:46,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:46,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 22:06:46,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 281633, now seen corresponding path program 1 times [2023-11-24 22:06:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576968229] [2023-11-24 22:06:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576968229] [2023-11-24 22:06:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576968229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:46,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783757940] [2023-11-24 22:06:46,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2023-11-24 22:06:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:46,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2023-11-24 22:06:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:49,809 INFO L124 PetriNetUnfolderBase]: 18093/26964 cut-off events. [2023-11-24 22:06:49,809 INFO L125 PetriNetUnfolderBase]: For 13236/13236 co-relation queries the response was YES. [2023-11-24 22:06:50,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52457 conditions, 26964 events. 18093/26964 cut-off events. For 13236/13236 co-relation queries the response was YES. Maximal size of possible extension queue 1549. Compared 206356 event pairs, 18093 based on Foata normal form. 0/19570 useless extension candidates. Maximal degree in co-relation 11063. Up to 23552 conditions per place. [2023-11-24 22:06:50,238 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 23 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-24 22:06:50,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 170 flow [2023-11-24 22:06:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2023-11-24 22:06:50,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-24 22:06:50,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2023-11-24 22:06:50,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2023-11-24 22:06:50,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:50,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2023-11-24 22:06:50,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:50,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:50,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:50,242 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 130 flow. Second operand 3 states and 80 transitions. [2023-11-24 22:06:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 170 flow [2023-11-24 22:06:50,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 158 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:50,251 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 112 flow [2023-11-24 22:06:50,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-11-24 22:06:50,252 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-11-24 22:06:50,252 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 112 flow [2023-11-24 22:06:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:50,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:50,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:06:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 22:06:50,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 22:06:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 281634, now seen corresponding path program 1 times [2023-11-24 22:06:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215109623] [2023-11-24 22:06:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:50,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:50,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215109623] [2023-11-24 22:06:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215109623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:50,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:50,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692381086] [2023-11-24 22:06:50,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2023-11-24 22:06:50,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:50,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:50,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2023-11-24 22:06:50,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:52,852 INFO L124 PetriNetUnfolderBase]: 18093/25599 cut-off events. [2023-11-24 22:06:52,852 INFO L125 PetriNetUnfolderBase]: For 10580/10580 co-relation queries the response was YES. [2023-11-24 22:06:52,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50182 conditions, 25599 events. 18093/25599 cut-off events. For 10580/10580 co-relation queries the response was YES. Maximal size of possible extension queue 1452. Compared 181047 event pairs, 18093 based on Foata normal form. 0/18205 useless extension candidates. Maximal degree in co-relation 50171. Up to 23552 conditions per place. [2023-11-24 22:06:53,078 INFO L140 encePairwiseOnDemand]: 43/45 looper letters, 23 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-24 22:06:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 158 flow [2023-11-24 22:06:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-24 22:06:53,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2023-11-24 22:06:53,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-24 22:06:53,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-24 22:06:53,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:53,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-24 22:06:53,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:53,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:53,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:53,082 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 112 flow. Second operand 3 states and 79 transitions. [2023-11-24 22:06:53,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 158 flow [2023-11-24 22:06:53,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:53,107 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 111 flow [2023-11-24 22:06:53,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-11-24 22:06:53,109 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-11-24 22:06:53,109 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 111 flow [2023-11-24 22:06:53,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:53,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:53,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:06:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 22:06:53,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 22:06:53,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash -199550495, now seen corresponding path program 1 times [2023-11-24 22:06:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:53,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52632425] [2023-11-24 22:06:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:53,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52632425] [2023-11-24 22:06:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52632425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:53,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:53,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:06:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129812196] [2023-11-24 22:06:53,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:53,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-24 22:06:53,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:53,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-24 22:06:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:56,934 INFO L124 PetriNetUnfolderBase]: 37470/48441 cut-off events. [2023-11-24 22:06:56,934 INFO L125 PetriNetUnfolderBase]: For 2391/2391 co-relation queries the response was YES. [2023-11-24 22:06:57,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98807 conditions, 48441 events. 37470/48441 cut-off events. For 2391/2391 co-relation queries the response was YES. Maximal size of possible extension queue 2007. Compared 264984 event pairs, 16562 based on Foata normal form. 0/38888 useless extension candidates. Maximal degree in co-relation 98795. Up to 47741 conditions per place. [2023-11-24 22:06:57,318 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 38 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-11-24 22:06:57,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 251 flow [2023-11-24 22:06:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-24 22:06:57,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2023-11-24 22:06:57,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-24 22:06:57,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-24 22:06:57,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-24 22:06:57,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:57,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:57,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:57,321 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 111 flow. Second operand 3 states and 94 transitions. [2023-11-24 22:06:57,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 251 flow [2023-11-24 22:06:57,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:57,326 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 158 flow [2023-11-24 22:06:57,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-24 22:06:57,327 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-11-24 22:06:57,327 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 158 flow [2023-11-24 22:06:57,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:57,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:57,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:57,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 22:06:57,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 22:06:57,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash -777933216, now seen corresponding path program 1 times [2023-11-24 22:06:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:57,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921807709] [2023-11-24 22:06:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:57,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:06:57,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921807709] [2023-11-24 22:06:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921807709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:57,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487400931] [2023-11-24 22:06:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:57,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-24 22:06:57,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:57,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:57,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-24 22:06:57,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:07:00,309 INFO L124 PetriNetUnfolderBase]: 20892/30533 cut-off events. [2023-11-24 22:07:00,309 INFO L125 PetriNetUnfolderBase]: For 11139/11139 co-relation queries the response was YES. [2023-11-24 22:07:00,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63123 conditions, 30533 events. 20892/30533 cut-off events. For 11139/11139 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 213003 event pairs, 7898 based on Foata normal form. 8502/37752 useless extension candidates. Maximal degree in co-relation 63109. Up to 23578 conditions per place. [2023-11-24 22:07:00,535 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 34 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2023-11-24 22:07:00,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 268 flow [2023-11-24 22:07:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:07:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:07:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-24 22:07:00,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2023-11-24 22:07:00,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-24 22:07:00,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-24 22:07:00,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:07:00,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-24 22:07:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:00,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:00,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:00,540 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 158 flow. Second operand 3 states and 89 transitions. [2023-11-24 22:07:00,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 268 flow [2023-11-24 22:07:00,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:07:00,547 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 167 flow [2023-11-24 22:07:00,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-24 22:07:00,547 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-11-24 22:07:00,548 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 167 flow [2023-11-24 22:07:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:00,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:07:00,548 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:07:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 22:07:00,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-24 22:07:00,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:07:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 256311610, now seen corresponding path program 1 times [2023-11-24 22:07:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:07:00,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424785424] [2023-11-24 22:07:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:07:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:07:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:07:00,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:07:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:07:00,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:07:00,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:07:00,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-24 22:07:00,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-24 22:07:00,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-24 22:07:00,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-24 22:07:00,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-11-24 22:07:00,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-24 22:07:00,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-24 22:07:00,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-24 22:07:00,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-24 22:07:00,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-24 22:07:00,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 22:07:00,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-24 22:07:00,586 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:07:00,586 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-24 22:07:00,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:07:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 158 flow [2023-11-24 22:07:00,623 INFO L124 PetriNetUnfolderBase]: 0/99 cut-off events. [2023-11-24 22:07:00,623 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-24 22:07:00,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 99 events. 0/99 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 267 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-24 22:07:00,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 158 flow [2023-11-24 22:07:00,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 52 transitions, 158 flow [2023-11-24 22:07:00,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:07:00,627 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;@729575a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:07:00,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-24 22:07:00,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:07:00,628 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:07:00,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:07:00,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:07:00,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:07:00,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 22:07:00,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:07:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 333269, now seen corresponding path program 1 times [2023-11-24 22:07:00,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:07:00,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855934136] [2023-11-24 22:07:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:07:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:07:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:07:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:07:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:07:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855934136] [2023-11-24 22:07:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855934136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:07:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:07:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:07:00,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205039763] [2023-11-24 22:07:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:07:00,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:07:00,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:07:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:07:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:07:00,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2023-11-24 22:07:00,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:00,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:07:00,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2023-11-24 22:07:00,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:07:12,406 INFO L124 PetriNetUnfolderBase]: 88749/124244 cut-off events. [2023-11-24 22:07:12,406 INFO L125 PetriNetUnfolderBase]: For 79796/79796 co-relation queries the response was YES. [2023-11-24 22:07:13,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243946 conditions, 124244 events. 88749/124244 cut-off events. For 79796/79796 co-relation queries the response was YES. Maximal size of possible extension queue 5811. Compared 986191 event pairs, 88749 based on Foata normal form. 0/89202 useless extension candidates. Maximal degree in co-relation 52791. Up to 110592 conditions per place. [2023-11-24 22:07:13,790 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 27 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 22:07:13,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 206 flow [2023-11-24 22:07:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:07:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:07:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-24 22:07:13,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2023-11-24 22:07:13,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-24 22:07:13,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-24 22:07:13,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:07:13,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-24 22:07:13,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:13,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:13,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:13,793 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 158 flow. Second operand 3 states and 93 transitions. [2023-11-24 22:07:13,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 206 flow [2023-11-24 22:07:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 48 transitions, 186 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-24 22:07:13,859 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 132 flow [2023-11-24 22:07:13,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-11-24 22:07:13,860 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-24 22:07:13,860 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 132 flow [2023-11-24 22:07:13,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:13,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:07:13,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:07:13,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 22:07:13,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-24 22:07:13,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:07:13,862 INFO L85 PathProgramCache]: Analyzing trace with hash 333270, now seen corresponding path program 1 times [2023-11-24 22:07:13,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:07:13,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660494903] [2023-11-24 22:07:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:07:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:07:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:07:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:07:13,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:07:13,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660494903] [2023-11-24 22:07:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660494903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:07:13,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:07:13,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:07:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615905317] [2023-11-24 22:07:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:07:13,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:07:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:07:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:07:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:07:13,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2023-11-24 22:07:13,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:07:13,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:07:13,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2023-11-24 22:07:13,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand