./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-hard1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-hard1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34f393fd72a97393a0a39d407b9330aa7c1c7e210ad76310ea88c9427f882106 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:30:16,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:30:16,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:30:16,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:30:16,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:30:16,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:30:16,289 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:30:16,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:30:16,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:30:16,291 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:30:16,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:30:16,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:30:16,297 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:30:16,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:30:16,298 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:30:16,299 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:30:16,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:30:16,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:30:16,301 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:30:16,301 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:30:16,302 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:30:16,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:30:16,307 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:30:16,307 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:30:16,308 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:30:16,308 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:30:16,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:30:16,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:30:16,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:30:16,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:16,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:30:16,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:30:16,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:30:16,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:30:16,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:30:16,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:30:16,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:30:16,314 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:30:16,315 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_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f393fd72a97393a0a39d407b9330aa7c1c7e210ad76310ea88c9427f882106 [2023-11-12 02:30:16,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:30:16,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:30:16,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:30:16,641 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:30:16,642 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:30:16,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/test-hard1.wvr.c [2023-11-12 02:30:19,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:30:20,193 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:30:20,194 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/sv-benchmarks/c/weaver/test-hard1.wvr.c [2023-11-12 02:30:20,205 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/data/116b39ccf/fae8ebcaa42847a5aa3c3f7df5dcc00b/FLAG33346396d [2023-11-12 02:30:20,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/data/116b39ccf/fae8ebcaa42847a5aa3c3f7df5dcc00b [2023-11-12 02:30:20,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:30:20,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:30:20,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:20,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:30:20,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:30:20,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2189dbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20, skipping insertion in model container [2023-11-12 02:30:20,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,266 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:30:20,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:20,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:30:20,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:20,543 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:30:20,543 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:30:20,550 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:30:20,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20 WrapperNode [2023-11-12 02:30:20,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:20,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:20,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:30:20,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:30:20,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,568 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,594 INFO L138 Inliner]: procedures = 24, calls = 57, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2023-11-12 02:30:20,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:20,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:30:20,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:30:20,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:30:20,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,624 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:30:20,633 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:30:20,633 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:30:20,633 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:30:20,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (1/1) ... [2023-11-12 02:30:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:20,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:30:20,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:30:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:30:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:30:20,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:30:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:30:20,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:30:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:30:20,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:30:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:30:20,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:30:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:30:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:30:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:30:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:30:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:30:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:30:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:30:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:30:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:30:20,744 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:30:20,919 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:30:20,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:30:21,366 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:30:21,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:30:21,460 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:30:21,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:21 BoogieIcfgContainer [2023-11-12 02:30:21,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:30:21,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:30:21,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:30:21,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:30:21,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:30:20" (1/3) ... [2023-11-12 02:30:21,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfac6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:21, skipping insertion in model container [2023-11-12 02:30:21,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:20" (2/3) ... [2023-11-12 02:30:21,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfac6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:21, skipping insertion in model container [2023-11-12 02:30:21,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:21" (3/3) ... [2023-11-12 02:30:21,513 INFO L112 eAbstractionObserver]: Analyzing ICFG test-hard1.wvr.c [2023-11-12 02:30:21,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:30:21,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-12 02:30:21,536 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:30:21,677 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:30:21,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 163 transitions, 354 flow [2023-11-12 02:30:21,801 INFO L124 PetriNetUnfolderBase]: 10/159 cut-off events. [2023-11-12 02:30:21,801 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:30:21,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 159 events. 10/159 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 02:30:21,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 163 transitions, 354 flow [2023-11-12 02:30:21,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 154 transitions, 332 flow [2023-11-12 02:30:21,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:30:21,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 154 transitions, 332 flow [2023-11-12 02:30:21,847 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 154 transitions, 332 flow [2023-11-12 02:30:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 154 transitions, 332 flow [2023-11-12 02:30:21,894 INFO L124 PetriNetUnfolderBase]: 10/154 cut-off events. [2023-11-12 02:30:21,895 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:30:21,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 154 events. 10/154 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 133 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 02:30:21,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 2736 [2023-11-12 02:30:28,751 INFO L134 LiptonReduction]: Checked pairs total: 4939 [2023-11-12 02:30:28,752 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-11-12 02:30:28,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:28,776 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;@445aec8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:28,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-12 02:30:28,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:30:28,779 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:30:28,779 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:30:28,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:28,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:30:28,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:28,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 634, now seen corresponding path program 1 times [2023-11-12 02:30:28,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:28,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879364810] [2023-11-12 02:30:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879364810] [2023-11-12 02:30:28,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879364810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:28,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:28,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:30:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116624789] [2023-11-12 02:30:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:28,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:30:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:30:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:30:28,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 306 [2023-11-12 02:30:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:28,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:28,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 306 [2023-11-12 02:30:28,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:29,854 INFO L124 PetriNetUnfolderBase]: 4525/6224 cut-off events. [2023-11-12 02:30:29,854 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-12 02:30:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12369 conditions, 6224 events. 4525/6224 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27037 event pairs, 4185 based on Foata normal form. 0/3896 useless extension candidates. Maximal degree in co-relation 10228. Up to 5885 conditions per place. [2023-11-12 02:30:29,932 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 43 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-11-12 02:30:29,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 204 flow [2023-11-12 02:30:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:30:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:30:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 334 transitions. [2023-11-12 02:30:29,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545751633986928 [2023-11-12 02:30:29,950 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 334 transitions. [2023-11-12 02:30:29,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 334 transitions. [2023-11-12 02:30:29,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:29,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 334 transitions. [2023-11-12 02:30:29,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:29,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:29,966 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:29,968 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 124 flow. Second operand 2 states and 334 transitions. [2023-11-12 02:30:29,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 204 flow [2023-11-12 02:30:29,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-12 02:30:29,981 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 102 flow [2023-11-12 02:30:29,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-12 02:30:29,987 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-11-12 02:30:29,988 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 102 flow [2023-11-12 02:30:29,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:29,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:29,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:30:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:30:29,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:29,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 622959, now seen corresponding path program 1 times [2023-11-12 02:30:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298729481] [2023-11-12 02:30:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298729481] [2023-11-12 02:30:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298729481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:30,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:30,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486201122] [2023-11-12 02:30:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:30,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:30,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-11-12 02:30:30,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:30,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:30,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-11-12 02:30:30,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:31,174 INFO L124 PetriNetUnfolderBase]: 4377/6008 cut-off events. [2023-11-12 02:30:31,175 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:31,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11765 conditions, 6008 events. 4377/6008 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25859 event pairs, 4038 based on Foata normal form. 0/3797 useless extension candidates. Maximal degree in co-relation 11762. Up to 5669 conditions per place. [2023-11-12 02:30:31,234 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 40 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-12 02:30:31,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 180 flow [2023-11-12 02:30:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-11-12 02:30:31,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782135076252723 [2023-11-12 02:30:31,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-11-12 02:30:31,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-11-12 02:30:31,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:31,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-11-12 02:30:31,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:31,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:31,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:31,247 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 102 flow. Second operand 3 states and 439 transitions. [2023-11-12 02:30:31,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 180 flow [2023-11-12 02:30:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:30:31,250 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 100 flow [2023-11-12 02:30:31,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-12 02:30:31,251 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-11-12 02:30:31,251 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 100 flow [2023-11-12 02:30:31,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:31,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:31,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:30:31,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:30:31,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:31,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash 622960, now seen corresponding path program 1 times [2023-11-12 02:30:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:31,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294134259] [2023-11-12 02:30:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:31,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294134259] [2023-11-12 02:30:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294134259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:31,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:31,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:31,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917760063] [2023-11-12 02:30:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:31,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:31,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:31,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 306 [2023-11-12 02:30:31,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:31,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:31,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 306 [2023-11-12 02:30:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:32,274 INFO L124 PetriNetUnfolderBase]: 4229/5792 cut-off events. [2023-11-12 02:30:32,274 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:32,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11336 conditions, 5792 events. 4229/5792 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24723 event pairs, 3891 based on Foata normal form. 0/3698 useless extension candidates. Maximal degree in co-relation 11332. Up to 5454 conditions per place. [2023-11-12 02:30:32,329 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 38 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-12 02:30:32,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 174 flow [2023-11-12 02:30:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-11-12 02:30:32,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49564270152505446 [2023-11-12 02:30:32,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-11-12 02:30:32,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-11-12 02:30:32,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:32,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-11-12 02:30:32,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:32,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:32,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:32,348 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 100 flow. Second operand 3 states and 455 transitions. [2023-11-12 02:30:32,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 174 flow [2023-11-12 02:30:32,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:32,352 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 97 flow [2023-11-12 02:30:32,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-12 02:30:32,354 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -11 predicate places. [2023-11-12 02:30:32,355 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 97 flow [2023-11-12 02:30:32,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:32,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:30:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:30:32,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:32,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash 598677156, now seen corresponding path program 1 times [2023-11-12 02:30:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659857960] [2023-11-12 02:30:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:32,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659857960] [2023-11-12 02:30:32,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659857960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:32,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:32,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:32,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041212336] [2023-11-12 02:30:32,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:32,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:32,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:32,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:32,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-11-12 02:30:32,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:32,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:32,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-11-12 02:30:32,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:33,307 INFO L124 PetriNetUnfolderBase]: 4177/5708 cut-off events. [2023-11-12 02:30:33,308 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11173 conditions, 5708 events. 4177/5708 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24304 event pairs, 3843 based on Foata normal form. 0/3662 useless extension candidates. Maximal degree in co-relation 11169. Up to 5374 conditions per place. [2023-11-12 02:30:33,356 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-12 02:30:33,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 167 flow [2023-11-12 02:30:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-11-12 02:30:33,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2023-11-12 02:30:33,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-11-12 02:30:33,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-11-12 02:30:33,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:33,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-11-12 02:30:33,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:33,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:33,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:33,367 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 97 flow. Second operand 3 states and 435 transitions. [2023-11-12 02:30:33,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 167 flow [2023-11-12 02:30:33,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:33,369 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 94 flow [2023-11-12 02:30:33,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=94, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-12 02:30:33,372 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -12 predicate places. [2023-11-12 02:30:33,372 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 94 flow [2023-11-12 02:30:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:33,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:33,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:30:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:30:33,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 598677157, now seen corresponding path program 1 times [2023-11-12 02:30:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865712003] [2023-11-12 02:30:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:33,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:33,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865712003] [2023-11-12 02:30:33,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865712003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:33,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:33,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:33,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760192226] [2023-11-12 02:30:33,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:33,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 306 [2023-11-12 02:30:33,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:33,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:33,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 306 [2023-11-12 02:30:33,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:34,263 INFO L124 PetriNetUnfolderBase]: 4125/5624 cut-off events. [2023-11-12 02:30:34,263 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:34,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 5624 events. 4125/5624 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23912 event pairs, 3795 based on Foata normal form. 0/3626 useless extension candidates. Maximal degree in co-relation 11006. Up to 5294 conditions per place. [2023-11-12 02:30:34,311 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-12 02:30:34,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 160 flow [2023-11-12 02:30:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-12 02:30:34,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912854030501089 [2023-11-12 02:30:34,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-12 02:30:34,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-12 02:30:34,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:34,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-12 02:30:34,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:34,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:34,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:34,323 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 94 flow. Second operand 3 states and 451 transitions. [2023-11-12 02:30:34,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 160 flow [2023-11-12 02:30:34,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:34,326 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2023-11-12 02:30:34,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-12 02:30:34,330 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -13 predicate places. [2023-11-12 02:30:34,330 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2023-11-12 02:30:34,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:34,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:34,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:30:34,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:34,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -196854108, now seen corresponding path program 1 times [2023-11-12 02:30:34,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:34,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705158458] [2023-11-12 02:30:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:34,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:34,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705158458] [2023-11-12 02:30:34,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705158458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:34,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461061068] [2023-11-12 02:30:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:34,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-11-12 02:30:34,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:34,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:34,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-11-12 02:30:34,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:35,240 INFO L124 PetriNetUnfolderBase]: 3962/5393 cut-off events. [2023-11-12 02:30:35,240 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:35,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10565 conditions, 5393 events. 3962/5393 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22727 event pairs, 3648 based on Foata normal form. 0/3512 useless extension candidates. Maximal degree in co-relation 10561. Up to 5079 conditions per place. [2023-11-12 02:30:35,281 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-12 02:30:35,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 153 flow [2023-11-12 02:30:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-12 02:30:35,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46949891067538124 [2023-11-12 02:30:35,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-12 02:30:35,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-12 02:30:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-12 02:30:35,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,291 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 431 transitions. [2023-11-12 02:30:35,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 153 flow [2023-11-12 02:30:35,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:35,293 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 88 flow [2023-11-12 02:30:35,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-12 02:30:35,294 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -14 predicate places. [2023-11-12 02:30:35,295 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 88 flow [2023-11-12 02:30:35,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:35,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:35,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:30:35,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:35,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash -196854110, now seen corresponding path program 1 times [2023-11-12 02:30:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:35,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915006129] [2023-11-12 02:30:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:35,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:35,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915006129] [2023-11-12 02:30:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915006129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:35,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318150120] [2023-11-12 02:30:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:35,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:35,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 306 [2023-11-12 02:30:35,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:35,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 306 [2023-11-12 02:30:35,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:35,929 INFO L124 PetriNetUnfolderBase]: 3799/5162 cut-off events. [2023-11-12 02:30:35,930 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:35,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 5162 events. 3799/5162 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21577 event pairs, 3501 based on Foata normal form. 0/3398 useless extension candidates. Maximal degree in co-relation 10116. Up to 4864 conditions per place. [2023-11-12 02:30:35,979 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-12 02:30:35,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 35 transitions, 146 flow [2023-11-12 02:30:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-11-12 02:30:35,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2023-11-12 02:30:35,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-11-12 02:30:35,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-11-12 02:30:35,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:35,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-11-12 02:30:35,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:36,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:36,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:36,105 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 88 flow. Second operand 3 states and 447 transitions. [2023-11-12 02:30:36,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 35 transitions, 146 flow [2023-11-12 02:30:36,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:36,107 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 85 flow [2023-11-12 02:30:36,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-12 02:30:36,108 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -15 predicate places. [2023-11-12 02:30:36,108 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 85 flow [2023-11-12 02:30:36,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:36,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:36,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:36,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:30:36,109 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:36,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -198223160, now seen corresponding path program 1 times [2023-11-12 02:30:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:36,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700900202] [2023-11-12 02:30:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:36,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:36,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700900202] [2023-11-12 02:30:36,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700900202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:36,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:36,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:36,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937574226] [2023-11-12 02:30:36,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:30:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:30:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:36,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 306 [2023-11-12 02:30:36,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:36,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:36,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 306 [2023-11-12 02:30:36,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:36,980 INFO L124 PetriNetUnfolderBase]: 2967/4074 cut-off events. [2023-11-12 02:30:36,980 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8009 conditions, 4074 events. 2967/4074 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16554 event pairs, 2733 based on Foata normal form. 0/2822 useless extension candidates. Maximal degree in co-relation 8005. Up to 3840 conditions per place. [2023-11-12 02:30:37,011 INFO L140 encePairwiseOnDemand]: 304/306 looper letters, 29 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-12 02:30:37,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 143 flow [2023-11-12 02:30:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-11-12 02:30:37,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553376906318083 [2023-11-12 02:30:37,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-11-12 02:30:37,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-11-12 02:30:37,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:37,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-11-12 02:30:37,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,020 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 85 flow. Second operand 3 states and 418 transitions. [2023-11-12 02:30:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 143 flow [2023-11-12 02:30:37,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:37,022 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 84 flow [2023-11-12 02:30:37,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=84, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-12 02:30:37,023 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -15 predicate places. [2023-11-12 02:30:37,023 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 84 flow [2023-11-12 02:30:37,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:37,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:30:37,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:37,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash -198223161, now seen corresponding path program 1 times [2023-11-12 02:30:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018696142] [2023-11-12 02:30:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018696142] [2023-11-12 02:30:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018696142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:37,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:30:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679669157] [2023-11-12 02:30:37,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:37,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:37,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:37,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 306 [2023-11-12 02:30:37,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:37,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 306 [2023-11-12 02:30:37,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:37,620 INFO L124 PetriNetUnfolderBase]: 2135/2986 cut-off events. [2023-11-12 02:30:37,620 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:30:37,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 2986 events. 2135/2986 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11690 event pairs, 1965 based on Foata normal form. 0/2246 useless extension candidates. Maximal degree in co-relation 5894. Up to 2816 conditions per place. [2023-11-12 02:30:37,642 INFO L140 encePairwiseOnDemand]: 304/306 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-12 02:30:37,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 33 transitions, 140 flow [2023-11-12 02:30:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-12 02:30:37,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42483660130718953 [2023-11-12 02:30:37,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-12 02:30:37,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-12 02:30:37,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:37,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-12 02:30:37,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,650 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 84 flow. Second operand 3 states and 390 transitions. [2023-11-12 02:30:37,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 33 transitions, 140 flow [2023-11-12 02:30:37,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:37,652 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 83 flow [2023-11-12 02:30:37,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=83, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-11-12 02:30:37,653 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -15 predicate places. [2023-11-12 02:30:37,653 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 83 flow [2023-11-12 02:30:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:37,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:30:37,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:37,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -446273618, now seen corresponding path program 1 times [2023-11-12 02:30:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:37,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266971249] [2023-11-12 02:30:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266971249] [2023-11-12 02:30:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266971249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:37,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:30:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695876779] [2023-11-12 02:30:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:37,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 306 [2023-11-12 02:30:37,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:37,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:37,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 306 [2023-11-12 02:30:37,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:38,321 INFO L124 PetriNetUnfolderBase]: 3286/4448 cut-off events. [2023-11-12 02:30:38,321 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-12 02:30:38,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 4448 events. 3286/4448 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18180 event pairs, 656 based on Foata normal form. 1/3333 useless extension candidates. Maximal degree in co-relation 8477. Up to 2975 conditions per place. [2023-11-12 02:30:38,355 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 49 selfloop transitions, 5 changer transitions 1/59 dead transitions. [2023-11-12 02:30:38,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 252 flow [2023-11-12 02:30:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-11-12 02:30:38,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-12 02:30:38,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-11-12 02:30:38,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-11-12 02:30:38,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:38,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-11-12 02:30:38,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:38,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:38,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:38,365 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 83 flow. Second operand 3 states and 476 transitions. [2023-11-12 02:30:38,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 252 flow [2023-11-12 02:30:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:38,368 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 115 flow [2023-11-12 02:30:38,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=82, 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=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-11-12 02:30:38,370 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -13 predicate places. [2023-11-12 02:30:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 115 flow [2023-11-12 02:30:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:38,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:38,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:38,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:30:38,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash 29174449, now seen corresponding path program 1 times [2023-11-12 02:30:38,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:38,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008413033] [2023-11-12 02:30:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008413033] [2023-11-12 02:30:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008413033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:38,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:38,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:30:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771723821] [2023-11-12 02:30:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:30:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:30:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:38,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-11-12 02:30:38,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:38,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:38,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-11-12 02:30:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:40,059 INFO L124 PetriNetUnfolderBase]: 5756/7745 cut-off events. [2023-11-12 02:30:40,059 INFO L125 PetriNetUnfolderBase]: For 1562/1562 co-relation queries the response was YES. [2023-11-12 02:30:40,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18003 conditions, 7745 events. 5756/7745 cut-off events. For 1562/1562 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34952 event pairs, 1528 based on Foata normal form. 186/7929 useless extension candidates. Maximal degree in co-relation 17998. Up to 3082 conditions per place. [2023-11-12 02:30:40,131 INFO L140 encePairwiseOnDemand]: 298/306 looper letters, 110 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2023-11-12 02:30:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 129 transitions, 637 flow [2023-11-12 02:30:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:30:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:30:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 923 transitions. [2023-11-12 02:30:40,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027233115468409 [2023-11-12 02:30:40,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 923 transitions. [2023-11-12 02:30:40,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 923 transitions. [2023-11-12 02:30:40,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:40,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 923 transitions. [2023-11-12 02:30:40,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.83333333333334) internal successors, (923), 6 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:40,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:40,148 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:40,148 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 115 flow. Second operand 6 states and 923 transitions. [2023-11-12 02:30:40,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 129 transitions, 637 flow [2023-11-12 02:30:40,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 129 transitions, 620 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:40,154 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 231 flow [2023-11-12 02:30:40,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-12 02:30:40,155 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-11-12 02:30:40,156 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 231 flow [2023-11-12 02:30:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:40,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:40,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:40,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:30:40,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:40,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash -220061965, now seen corresponding path program 2 times [2023-11-12 02:30:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345594118] [2023-11-12 02:30:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:40,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345594118] [2023-11-12 02:30:40,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345594118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:40,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:40,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:30:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824257481] [2023-11-12 02:30:40,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:40,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 306 [2023-11-12 02:30:40,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 138.5) internal successors, (831), 6 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:40,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:40,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 306 [2023-11-12 02:30:40,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:42,451 INFO L124 PetriNetUnfolderBase]: 10318/14021 cut-off events. [2023-11-12 02:30:42,451 INFO L125 PetriNetUnfolderBase]: For 14264/14518 co-relation queries the response was YES. [2023-11-12 02:30:42,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40486 conditions, 14021 events. 10318/14021 cut-off events. For 14264/14518 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 71487 event pairs, 995 based on Foata normal form. 514/14389 useless extension candidates. Maximal degree in co-relation 40478. Up to 6021 conditions per place. [2023-11-12 02:30:42,567 INFO L140 encePairwiseOnDemand]: 297/306 looper letters, 164 selfloop transitions, 43 changer transitions 0/211 dead transitions. [2023-11-12 02:30:42,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 211 transitions, 1269 flow [2023-11-12 02:30:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:30:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:30:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1241 transitions. [2023-11-12 02:30:42,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-11-12 02:30:42,574 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1241 transitions. [2023-11-12 02:30:42,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1241 transitions. [2023-11-12 02:30:42,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:42,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1241 transitions. [2023-11-12 02:30:42,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.125) internal successors, (1241), 8 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:42,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:42,586 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:42,586 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 231 flow. Second operand 8 states and 1241 transitions. [2023-11-12 02:30:42,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 211 transitions, 1269 flow [2023-11-12 02:30:42,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 211 transitions, 1269 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:30:42,655 INFO L231 Difference]: Finished difference. Result has 66 places, 87 transitions, 622 flow [2023-11-12 02:30:42,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=622, PETRI_PLACES=66, PETRI_TRANSITIONS=87} [2023-11-12 02:30:42,656 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-11-12 02:30:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 87 transitions, 622 flow [2023-11-12 02:30:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.5) internal successors, (831), 6 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:42,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:42,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:30:42,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1677554983, now seen corresponding path program 1 times [2023-11-12 02:30:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666363249] [2023-11-12 02:30:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666363249] [2023-11-12 02:30:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666363249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:43,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197841724] [2023-11-12 02:30:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:43,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:43,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:43,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:43,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:30:43,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:43,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197841724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:44,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:44,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-12 02:30:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603034507] [2023-11-12 02:30:44,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:30:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:30:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:30:44,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 306 [2023-11-12 02:30:44,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 87 transitions, 622 flow. Second operand has 15 states, 15 states have (on average 129.73333333333332) internal successors, (1946), 15 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:44,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:44,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 306 [2023-11-12 02:30:44,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:53,981 INFO L124 PetriNetUnfolderBase]: 36092/48875 cut-off events. [2023-11-12 02:30:53,982 INFO L125 PetriNetUnfolderBase]: For 123848/124982 co-relation queries the response was YES. [2023-11-12 02:30:54,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183650 conditions, 48875 events. 36092/48875 cut-off events. For 123848/124982 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 286081 event pairs, 1016 based on Foata normal form. 2783/51652 useless extension candidates. Maximal degree in co-relation 183635. Up to 16126 conditions per place. [2023-11-12 02:30:54,484 INFO L140 encePairwiseOnDemand]: 292/306 looper letters, 540 selfloop transitions, 624 changer transitions 19/1187 dead transitions. [2023-11-12 02:30:54,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 1187 transitions, 10136 flow [2023-11-12 02:30:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-12 02:30:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-12 02:30:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5259 transitions. [2023-11-12 02:30:54,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46449390567037624 [2023-11-12 02:30:54,509 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5259 transitions. [2023-11-12 02:30:54,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5259 transitions. [2023-11-12 02:30:54,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:54,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5259 transitions. [2023-11-12 02:30:54,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 142.13513513513513) internal successors, (5259), 37 states have internal predecessors, (5259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:54,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 306.0) internal successors, (11628), 38 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:54,566 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 306.0) internal successors, (11628), 38 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:54,566 INFO L175 Difference]: Start difference. First operand has 66 places, 87 transitions, 622 flow. Second operand 37 states and 5259 transitions. [2023-11-12 02:30:54,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 1187 transitions, 10136 flow [2023-11-12 02:30:55,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 1187 transitions, 9900 flow, removed 118 selfloop flow, removed 0 redundant places. [2023-11-12 02:30:55,523 INFO L231 Difference]: Finished difference. Result has 130 places, 737 transitions, 8367 flow [2023-11-12 02:30:55,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8367, PETRI_PLACES=130, PETRI_TRANSITIONS=737} [2023-11-12 02:30:55,524 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 71 predicate places. [2023-11-12 02:30:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 737 transitions, 8367 flow [2023-11-12 02:30:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.73333333333332) internal successors, (1946), 15 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:55,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:55,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:55,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d250805-423b-4bed-813c-641a75d4c7ed/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:55,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-12 02:30:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1609421045, now seen corresponding path program 1 times [2023-11-12 02:30:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366522507] [2023-11-12 02:30:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366522507] [2023-11-12 02:30:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366522507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:56,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:30:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721443223] [2023-11-12 02:30:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:30:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:30:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:56,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 306 [2023-11-12 02:30:56,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 737 transitions, 8367 flow. Second operand has 7 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:56,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:56,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 306 [2023-11-12 02:30:56,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand