./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-easy10.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-easy10.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58ff882a2a27d6746f141646b2befb8bb2c361fcab13fbe9966095432ec78b12 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:34,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:34,523 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:34,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:34,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:34,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:34,560 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:34,561 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:34,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:34,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:34,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:34,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:34,565 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:34,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:34,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:34,568 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:34,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:34,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:34,570 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:34,570 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:34,571 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:34,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:34,572 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:34,573 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:34,573 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:34,574 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:34,575 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:34,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:34,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:34,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:34,577 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:34,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:34,578 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:34,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:34,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:34,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:34,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:34,581 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:34,582 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_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58ff882a2a27d6746f141646b2befb8bb2c361fcab13fbe9966095432ec78b12 [2023-11-19 07:50:34,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:34,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:34,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:34,945 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:34,945 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:34,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/test-easy10.wvr.c [2023-11-19 07:50:38,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:38,602 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:38,603 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/sv-benchmarks/c/weaver/test-easy10.wvr.c [2023-11-19 07:50:38,614 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/data/808e9441c/87150081f03b45ecb4c0e5b9b7423fc2/FLAGeb2db6efc [2023-11-19 07:50:38,631 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/data/808e9441c/87150081f03b45ecb4c0e5b9b7423fc2 [2023-11-19 07:50:38,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:38,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:38,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:38,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:38,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:38,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:38,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2135e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38, skipping insertion in model container [2023-11-19 07:50:38,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:38,685 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:38,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:38,887 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:38,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:38,930 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:38,934 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:50:38,942 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:38,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38 WrapperNode [2023-11-19 07:50:38,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:38,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:38,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:38,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:38,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:38,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,001 INFO L138 Inliner]: procedures = 23, calls = 85, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 197 [2023-11-19 07:50:39,001 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:39,002 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:39,002 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:39,002 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:39,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,028 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,041 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:39,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:39,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:39,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:39,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (1/1) ... [2023-11-19 07:50:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:39,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3a04610-baad-48c7-bb64-e117ec252e34/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:39,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:39,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:50:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:50:39,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:50:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:50:39,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:50:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:50:39,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:50:39,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:50:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:50:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:50:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:39,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:39,117 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:50:39,237 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:39,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:39,662 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:39,780 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:39,780 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:50:39,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:39 BoogieIcfgContainer [2023-11-19 07:50:39,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:39,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:39,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:39,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:39,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:38" (1/3) ... [2023-11-19 07:50:39,809 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2b6904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:39, skipping insertion in model container [2023-11-19 07:50:39,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:38" (2/3) ... [2023-11-19 07:50:39,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2b6904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:39, skipping insertion in model container [2023-11-19 07:50:39,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:39" (3/3) ... [2023-11-19 07:50:39,812 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy10.wvr.c [2023-11-19 07:50:39,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:39,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-19 07:50:39,834 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:39,929 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:50:39,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 165 transitions, 358 flow [2023-11-19 07:50:40,056 INFO L124 PetriNetUnfolderBase]: 2/161 cut-off events. [2023-11-19 07:50:40,056 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:50:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 161 events. 2/161 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-11-19 07:50:40,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 165 transitions, 358 flow [2023-11-19 07:50:40,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 156 transitions, 336 flow [2023-11-19 07:50:40,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:40,083 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 156 transitions, 336 flow [2023-11-19 07:50:40,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 156 transitions, 336 flow [2023-11-19 07:50:40,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 156 transitions, 336 flow [2023-11-19 07:50:40,135 INFO L124 PetriNetUnfolderBase]: 2/156 cut-off events. [2023-11-19 07:50:40,135 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:50:40,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 2/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-11-19 07:50:40,140 INFO L119 LiptonReduction]: Number of co-enabled transitions 2736 [2023-11-19 07:50:48,255 INFO L134 LiptonReduction]: Checked pairs total: 17796 [2023-11-19 07:50:48,255 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-11-19 07:50:48,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:48,285 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;@536407b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:48,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-19 07:50:48,288 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:48,288 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:48,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:48,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:48,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:50:48,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:50:48,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 621, now seen corresponding path program 1 times [2023-11-19 07:50:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52905888] [2023-11-19 07:50:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52905888] [2023-11-19 07:50:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52905888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:48,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:50:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415149144] [2023-11-19 07:50:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:48,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:48,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 303 [2023-11-19 07:50:48,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 140 flow. Second operand has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:48,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:48,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 303 [2023-11-19 07:50:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:50,001 INFO L124 PetriNetUnfolderBase]: 4185/6895 cut-off events. [2023-11-19 07:50:50,001 INFO L125 PetriNetUnfolderBase]: For 241/241 co-relation queries the response was YES. [2023-11-19 07:50:50,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13040 conditions, 6895 events. 4185/6895 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 48065 event pairs, 4185 based on Foata normal form. 0/5904 useless extension candidates. Maximal degree in co-relation 10899. Up to 5885 conditions per place. [2023-11-19 07:50:50,099 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 43 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-11-19 07:50:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 220 flow [2023-11-19 07:50:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 346 transitions. [2023-11-19 07:50:50,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570957095709571 [2023-11-19 07:50:50,126 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 346 transitions. [2023-11-19 07:50:50,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 346 transitions. [2023-11-19 07:50:50,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:50,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 346 transitions. [2023-11-19 07:50:50,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 173.0) internal successors, (346), 2 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:50,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:50,155 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:50,157 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 140 flow. Second operand 2 states and 346 transitions. [2023-11-19 07:50:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 220 flow [2023-11-19 07:50:50,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 204 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:50:50,177 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 118 flow [2023-11-19 07:50:50,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-19 07:50:50,188 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-11-19 07:50:50,189 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 118 flow [2023-11-19 07:50:50,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 150.5) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:50,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:50,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:50,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:50:50,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,197 INFO L85 PathProgramCache]: Analyzing trace with hash 610077, now seen corresponding path program 1 times [2023-11-19 07:50:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:50,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876605943] [2023-11-19 07:50:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876605943] [2023-11-19 07:50:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876605943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:50,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83130020] [2023-11-19 07:50:50,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:50,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:50,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-11-19 07:50:50,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 118 flow. Second operand has 3 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) [2023-11-19 07:50:50,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:50,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-11-19 07:50:50,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:51,930 INFO L124 PetriNetUnfolderBase]: 4038/6680 cut-off events. [2023-11-19 07:50:51,931 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:51,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12437 conditions, 6680 events. 4038/6680 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 46651 event pairs, 4038 based on Foata normal form. 0/5759 useless extension candidates. Maximal degree in co-relation 12434. Up to 5669 conditions per place. [2023-11-19 07:50:52,000 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 40 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-19 07:50:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 196 flow [2023-11-19 07:50:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-11-19 07:50:52,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225522552255225 [2023-11-19 07:50:52,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-11-19 07:50:52,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-11-19 07:50:52,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:52,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-11-19 07:50:52,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:52,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:52,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:52,022 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 118 flow. Second operand 3 states and 475 transitions. [2023-11-19 07:50:52,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 196 flow [2023-11-19 07:50:52,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:52,026 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 116 flow [2023-11-19 07:50:52,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-19 07:50:52,028 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-11-19 07:50:52,029 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 116 flow [2023-11-19 07:50:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 07:50:52,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:52,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:50:52,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:52,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:50:52,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 610076, now seen corresponding path program 1 times [2023-11-19 07:50:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:52,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727884852] [2023-11-19 07:50:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727884852] [2023-11-19 07:50:52,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727884852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:52,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:52,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:52,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003997440] [2023-11-19 07:50:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:52,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 303 [2023-11-19 07:50:52,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 116 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) [2023-11-19 07:50:52,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:52,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 303 [2023-11-19 07:50:52,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:53,149 INFO L124 PetriNetUnfolderBase]: 3891/6465 cut-off events. [2023-11-19 07:50:53,149 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:53,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12009 conditions, 6465 events. 3891/6465 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45149 event pairs, 3891 based on Foata normal form. 0/5614 useless extension candidates. Maximal degree in co-relation 12005. Up to 5454 conditions per place. [2023-11-19 07:50:53,210 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 38 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-19 07:50:53,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 190 flow [2023-11-19 07:50:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-11-19 07:50:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005500550055005 [2023-11-19 07:50:53,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-11-19 07:50:53,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-11-19 07:50:53,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:53,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-11-19 07:50:53,218 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) [2023-11-19 07:50:53,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:53,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:53,223 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 116 flow. Second operand 3 states and 455 transitions. [2023-11-19 07:50:53,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 190 flow [2023-11-19 07:50:53,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:53,227 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 113 flow [2023-11-19 07:50:53,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-11-19 07:50:53,230 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-11-19 07:50:53,230 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 113 flow [2023-11-19 07:50:53,231 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) [2023-11-19 07:50:53,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:53,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:53,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:53,236 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)] === [2023-11-19 07:50:53,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 586299336, now seen corresponding path program 1 times [2023-11-19 07:50:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843793459] [2023-11-19 07:50:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843793459] [2023-11-19 07:50:53,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843793459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:53,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:53,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928467116] [2023-11-19 07:50:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:53,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:53,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 303 [2023-11-19 07:50:53,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 113 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) [2023-11-19 07:50:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 303 [2023-11-19 07:50:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:54,575 INFO L124 PetriNetUnfolderBase]: 3843/6373 cut-off events. [2023-11-19 07:50:54,575 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:54,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11838 conditions, 6373 events. 3843/6373 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 44364 event pairs, 3843 based on Foata normal form. 0/5554 useless extension candidates. Maximal degree in co-relation 11834. Up to 5374 conditions per place. [2023-11-19 07:50:54,631 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 36 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-19 07:50:54,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 183 flow [2023-11-19 07:50:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-19 07:50:54,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49834983498349833 [2023-11-19 07:50:54,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-19 07:50:54,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-19 07:50:54,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:54,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-19 07:50:54,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:54,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:54,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:54,643 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 113 flow. Second operand 3 states and 453 transitions. [2023-11-19 07:50:54,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 183 flow [2023-11-19 07:50:54,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:54,646 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 110 flow [2023-11-19 07:50:54,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-11-19 07:50:54,649 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -12 predicate places. [2023-11-19 07:50:54,650 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 110 flow [2023-11-19 07:50:54,650 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) [2023-11-19 07:50:54,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:54,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:54,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:54,651 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)] === [2023-11-19 07:50:54,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 586299335, now seen corresponding path program 1 times [2023-11-19 07:50:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:54,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604056813] [2023-11-19 07:50:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:54,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:54,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604056813] [2023-11-19 07:50:54,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604056813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:54,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322076110] [2023-11-19 07:50:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:54,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:54,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-11-19 07:50:54,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:54,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:54,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-11-19 07:50:54,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:55,713 INFO L124 PetriNetUnfolderBase]: 3795/6281 cut-off events. [2023-11-19 07:50:55,714 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:55,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11667 conditions, 6281 events. 3795/6281 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43625 event pairs, 3795 based on Foata normal form. 0/5494 useless extension candidates. Maximal degree in co-relation 11663. Up to 5294 conditions per place. [2023-11-19 07:50:55,781 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 34 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-19 07:50:55,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 176 flow [2023-11-19 07:50:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-11-19 07:50:55,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159515951595159 [2023-11-19 07:50:55,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-11-19 07:50:55,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-11-19 07:50:55,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:55,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-11-19 07:50:55,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,793 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 110 flow. Second operand 3 states and 469 transitions. [2023-11-19 07:50:55,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 176 flow [2023-11-19 07:50:55,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:55,797 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 107 flow [2023-11-19 07:50:55,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-19 07:50:55,801 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-19 07:50:55,801 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 107 flow [2023-11-19 07:50:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:55,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:55,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:55,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:50:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 792958528, now seen corresponding path program 1 times [2023-11-19 07:50:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:55,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149012592] [2023-11-19 07:50:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:55,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:55,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149012592] [2023-11-19 07:50:55,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149012592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:55,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:55,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:55,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004895554] [2023-11-19 07:50:55,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:55,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:55,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:56,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-11-19 07:50:56,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 107 flow. Second operand has 3 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) [2023-11-19 07:50:56,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:56,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-11-19 07:50:56,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:56,639 INFO L124 PetriNetUnfolderBase]: 3648/6018 cut-off events. [2023-11-19 07:50:56,639 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11190 conditions, 6018 events. 3648/6018 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41385 event pairs, 3648 based on Foata normal form. 0/5303 useless extension candidates. Maximal degree in co-relation 11186. Up to 5079 conditions per place. [2023-11-19 07:50:56,694 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 32 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 07:50:56,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 169 flow [2023-11-19 07:50:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-19 07:50:56,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137513751375138 [2023-11-19 07:50:56,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-19 07:50:56,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-19 07:50:56,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:56,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-19 07:50:56,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:56,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:56,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:56,705 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 107 flow. Second operand 3 states and 467 transitions. [2023-11-19 07:50:56,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 169 flow [2023-11-19 07:50:56,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:56,707 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 104 flow [2023-11-19 07:50:56,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=104, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-11-19 07:50:56,708 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-19 07:50:56,708 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 104 flow [2023-11-19 07:50:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 07:50:56,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:56,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:56,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:56,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:50:56,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 792958527, now seen corresponding path program 1 times [2023-11-19 07:50:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800587253] [2023-11-19 07:50:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:56,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800587253] [2023-11-19 07:50:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800587253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:56,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459062384] [2023-11-19 07:50:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:56,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 303 [2023-11-19 07:50:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 104 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) [2023-11-19 07:50:56,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:56,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 303 [2023-11-19 07:50:56,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:57,452 INFO L124 PetriNetUnfolderBase]: 3501/5755 cut-off events. [2023-11-19 07:50:57,453 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10713 conditions, 5755 events. 3501/5755 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39188 event pairs, 3501 based on Foata normal form. 0/5112 useless extension candidates. Maximal degree in co-relation 10709. Up to 4864 conditions per place. [2023-11-19 07:50:57,507 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 30 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-19 07:50:57,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 162 flow [2023-11-19 07:50:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-11-19 07:50:57,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49174917491749176 [2023-11-19 07:50:57,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-11-19 07:50:57,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-11-19 07:50:57,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:57,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-11-19 07:50:57,514 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) [2023-11-19 07:50:57,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:57,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:57,518 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 104 flow. Second operand 3 states and 447 transitions. [2023-11-19 07:50:57,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 162 flow [2023-11-19 07:50:57,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:57,520 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 101 flow [2023-11-19 07:50:57,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=101, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-19 07:50:57,522 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-19 07:50:57,522 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 101 flow [2023-11-19 07:50:57,522 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) [2023-11-19 07:50:57,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:57,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:57,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:50:57,523 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)] === [2023-11-19 07:50:57,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1823949392, now seen corresponding path program 1 times [2023-11-19 07:50:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:57,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463059583] [2023-11-19 07:50:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463059583] [2023-11-19 07:50:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463059583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:57,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834445294] [2023-11-19 07:50:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:58,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 303 [2023-11-19 07:50:58,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:58,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:58,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 303 [2023-11-19 07:50:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:58,719 INFO L124 PetriNetUnfolderBase]: 2733/4539 cut-off events. [2023-11-19 07:50:58,719 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8474 conditions, 4539 events. 2733/4539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30013 event pairs, 2733 based on Foata normal form. 0/4168 useless extension candidates. Maximal degree in co-relation 8470. Up to 3840 conditions per place. [2023-11-19 07:50:58,760 INFO L140 encePairwiseOnDemand]: 301/303 looper letters, 29 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-19 07:50:58,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 159 flow [2023-11-19 07:50:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-19 07:50:58,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47964796479647964 [2023-11-19 07:50:58,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-19 07:50:58,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-19 07:50:58,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:58,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-19 07:50:58,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:58,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:58,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:58,771 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 101 flow. Second operand 3 states and 436 transitions. [2023-11-19 07:50:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 159 flow [2023-11-19 07:50:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:58,773 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 100 flow [2023-11-19 07:50:58,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-11-19 07:50:58,775 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-19 07:50:58,775 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 100 flow [2023-11-19 07:50:58,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:58,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:58,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:50:58,777 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)] === [2023-11-19 07:50:58,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1823949391, now seen corresponding path program 1 times [2023-11-19 07:50:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740679847] [2023-11-19 07:50:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740679847] [2023-11-19 07:50:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740679847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:50:58,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745266763] [2023-11-19 07:50:58,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:58,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:59,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 303 [2023-11-19 07:50:59,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:59,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 303 [2023-11-19 07:50:59,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:59,600 INFO L124 PetriNetUnfolderBase]: 1965/3323 cut-off events. [2023-11-19 07:50:59,600 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:50:59,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6235 conditions, 3323 events. 1965/3323 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21273 event pairs, 1965 based on Foata normal form. 0/3224 useless extension candidates. Maximal degree in co-relation 6231. Up to 2816 conditions per place. [2023-11-19 07:50:59,636 INFO L140 encePairwiseOnDemand]: 301/303 looper letters, 28 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 07:50:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 41 transitions, 156 flow [2023-11-19 07:50:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-19 07:50:59,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44884488448844884 [2023-11-19 07:50:59,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-19 07:50:59,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-19 07:50:59,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:59,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-19 07:50:59,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,648 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 100 flow. Second operand 3 states and 408 transitions. [2023-11-19 07:50:59,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 41 transitions, 156 flow [2023-11-19 07:50:59,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:59,651 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 99 flow [2023-11-19 07:50:59,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=99, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-11-19 07:50:59,653 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-19 07:50:59,654 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 99 flow [2023-11-19 07:50:59,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:59,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:50:59,656 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)] === [2023-11-19 07:50:59,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash -316281342, now seen corresponding path program 1 times [2023-11-19 07:50:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160295803] [2023-11-19 07:50:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:59,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160295803] [2023-11-19 07:50:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160295803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:59,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301711319] [2023-11-19 07:50:59,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:59,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:59,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:59,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-11-19 07:50:59,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:59,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:59,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-11-19 07:50:59,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:00,411 INFO L124 PetriNetUnfolderBase]: 1839/2990 cut-off events. [2023-11-19 07:51:00,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:51:00,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5739 conditions, 2990 events. 1839/2990 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17021 event pairs, 555 based on Foata normal form. 84/3056 useless extension candidates. Maximal degree in co-relation 5735. Up to 2159 conditions per place. [2023-11-19 07:51:00,436 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-19 07:51:00,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 209 flow [2023-11-19 07:51:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-19 07:51:00,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357535753575358 [2023-11-19 07:51:00,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-19 07:51:00,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-19 07:51:00,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:00,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-19 07:51:00,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:00,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:00,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:00,446 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 99 flow. Second operand 3 states and 487 transitions. [2023-11-19 07:51:00,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 209 flow [2023-11-19 07:51:00,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:51:00,451 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 106 flow [2023-11-19 07:51:00,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-11-19 07:51:00,454 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-19 07:51:00,454 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 106 flow [2023-11-19 07:51:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:00,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:00,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:51:00,456 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)] === [2023-11-19 07:51:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -652853710, now seen corresponding path program 2 times [2023-11-19 07:51:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331731557] [2023-11-19 07:51:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331731557] [2023-11-19 07:51:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331731557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265437959] [2023-11-19 07:51:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:00,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-11-19 07:51:00,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:00,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:00,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-11-19 07:51:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:01,146 INFO L124 PetriNetUnfolderBase]: 1463/2444 cut-off events. [2023-11-19 07:51:01,147 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2023-11-19 07:51:01,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 2444 events. 1463/2444 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13423 event pairs, 563 based on Foata normal form. 70/2494 useless extension candidates. Maximal degree in co-relation 4756. Up to 1489 conditions per place. [2023-11-19 07:51:01,167 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-19 07:51:01,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 218 flow [2023-11-19 07:51:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-19 07:51:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357535753575358 [2023-11-19 07:51:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-19 07:51:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-19 07:51:01,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:01,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-19 07:51:01,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,203 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 106 flow. Second operand 3 states and 487 transitions. [2023-11-19 07:51:01,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 218 flow [2023-11-19 07:51:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:01,206 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 110 flow [2023-11-19 07:51:01,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-11-19 07:51:01,207 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -12 predicate places. [2023-11-19 07:51:01,207 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 110 flow [2023-11-19 07:51:01,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:01,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:01,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:51:01,209 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)] === [2023-11-19 07:51:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1941893030, now seen corresponding path program 3 times [2023-11-19 07:51:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481868588] [2023-11-19 07:51:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481868588] [2023-11-19 07:51:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481868588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:01,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855673409] [2023-11-19 07:51:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:01,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-11-19 07:51:01,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:01,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-11-19 07:51:01,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:01,785 INFO L124 PetriNetUnfolderBase]: 1327/2264 cut-off events. [2023-11-19 07:51:01,786 INFO L125 PetriNetUnfolderBase]: For 256/287 co-relation queries the response was YES. [2023-11-19 07:51:01,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 2264 events. 1327/2264 cut-off events. For 256/287 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12667 event pairs, 563 based on Foata normal form. 94/2292 useless extension candidates. Maximal degree in co-relation 4620. Up to 1309 conditions per place. [2023-11-19 07:51:01,799 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-19 07:51:01,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 231 flow [2023-11-19 07:51:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-19 07:51:01,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379537953795379 [2023-11-19 07:51:01,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-19 07:51:01,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-19 07:51:01,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:01,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-19 07:51:01,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,807 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 110 flow. Second operand 3 states and 489 transitions. [2023-11-19 07:51:01,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 231 flow [2023-11-19 07:51:01,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:01,810 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 114 flow [2023-11-19 07:51:01,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-11-19 07:51:01,812 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-11-19 07:51:01,813 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 114 flow [2023-11-19 07:51:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:01,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:01,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:51:01,814 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)] === [2023-11-19 07:51:01,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1642629506, now seen corresponding path program 4 times [2023-11-19 07:51:01,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:01,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596220532] [2023-11-19 07:51:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:01,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596220532] [2023-11-19 07:51:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596220532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:01,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:51:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459359900] [2023-11-19 07:51:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:51:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:51:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:51:01,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-11-19 07:51:01,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:01,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:01,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-11-19 07:51:01,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:02,225 INFO L124 PetriNetUnfolderBase]: 1063/1803 cut-off events. [2023-11-19 07:51:02,225 INFO L125 PetriNetUnfolderBase]: For 304/309 co-relation queries the response was YES. [2023-11-19 07:51:02,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 1803 events. 1063/1803 cut-off events. For 304/309 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9349 event pairs, 379 based on Foata normal form. 56/1820 useless extension candidates. Maximal degree in co-relation 3796. Up to 1259 conditions per place. [2023-11-19 07:51:02,238 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-19 07:51:02,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 237 flow [2023-11-19 07:51:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:51:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:51:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-11-19 07:51:02,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379537953795379 [2023-11-19 07:51:02,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-11-19 07:51:02,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-11-19 07:51:02,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:02,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-11-19 07:51:02,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,246 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 114 flow. Second operand 3 states and 489 transitions. [2023-11-19 07:51:02,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 237 flow [2023-11-19 07:51:02,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:02,249 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 118 flow [2023-11-19 07:51:02,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-11-19 07:51:02,250 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-11-19 07:51:02,250 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 118 flow [2023-11-19 07:51:02,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:02,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:02,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:02,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:51:02,252 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)] === [2023-11-19 07:51:02,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash -899461376, now seen corresponding path program 5 times [2023-11-19 07:51:02,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:02,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609397308] [2023-11-19 07:51:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:02,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:05,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609397308] [2023-11-19 07:51:05,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609397308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:05,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:05,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:51:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218762531] [2023-11-19 07:51:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:51:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:51:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:51:05,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-11-19 07:51:05,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 118 flow. Second operand has 14 states, 14 states have (on average 124.64285714285714) internal successors, (1745), 14 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:05,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:05,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-11-19 07:51:05,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:08,640 INFO L124 PetriNetUnfolderBase]: 6288/9415 cut-off events. [2023-11-19 07:51:08,640 INFO L125 PetriNetUnfolderBase]: For 1979/1979 co-relation queries the response was YES. [2023-11-19 07:51:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20743 conditions, 9415 events. 6288/9415 cut-off events. For 1979/1979 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 50083 event pairs, 1535 based on Foata normal form. 1/9412 useless extension candidates. Maximal degree in co-relation 20735. Up to 2954 conditions per place. [2023-11-19 07:51:08,734 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 187 selfloop transitions, 13 changer transitions 14/218 dead transitions. [2023-11-19 07:51:08,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 218 transitions, 979 flow [2023-11-19 07:51:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:51:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:51:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1923 transitions. [2023-11-19 07:51:08,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533239038189533 [2023-11-19 07:51:08,745 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1923 transitions. [2023-11-19 07:51:08,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1923 transitions. [2023-11-19 07:51:08,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:08,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1923 transitions. [2023-11-19 07:51:08,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.35714285714286) internal successors, (1923), 14 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:08,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:08,768 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:08,768 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 118 flow. Second operand 14 states and 1923 transitions. [2023-11-19 07:51:08,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 218 transitions, 979 flow [2023-11-19 07:51:08,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 218 transitions, 975 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:51:08,775 INFO L231 Difference]: Finished difference. Result has 83 places, 52 transitions, 211 flow [2023-11-19 07:51:08,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=211, PETRI_PLACES=83, PETRI_TRANSITIONS=52} [2023-11-19 07:51:08,777 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-19 07:51:08,777 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 52 transitions, 211 flow [2023-11-19 07:51:08,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.64285714285714) internal successors, (1745), 14 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:08,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:08,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:51:08,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:51:08,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1547317874, now seen corresponding path program 6 times [2023-11-19 07:51:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401728423] [2023-11-19 07:51:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:51:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401728423] [2023-11-19 07:51:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401728423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:11,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:51:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959619455] [2023-11-19 07:51:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:51:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:51:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:51:11,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 303 [2023-11-19 07:51:11,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 52 transitions, 211 flow. Second operand has 14 states, 14 states have (on average 124.64285714285714) internal successors, (1745), 14 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:11,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:51:11,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 303 [2023-11-19 07:51:11,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:51:16,970 INFO L124 PetriNetUnfolderBase]: 16736/25174 cut-off events. [2023-11-19 07:51:16,970 INFO L125 PetriNetUnfolderBase]: For 24038/24038 co-relation queries the response was YES. [2023-11-19 07:51:17,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73914 conditions, 25174 events. 16736/25174 cut-off events. For 24038/24038 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 162927 event pairs, 2835 based on Foata normal form. 1/25175 useless extension candidates. Maximal degree in co-relation 73895. Up to 6482 conditions per place. [2023-11-19 07:51:17,243 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 251 selfloop transitions, 23 changer transitions 9/287 dead transitions. [2023-11-19 07:51:17,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 287 transitions, 1673 flow [2023-11-19 07:51:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:51:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:51:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1939 transitions. [2023-11-19 07:51:17,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570957095709571 [2023-11-19 07:51:17,254 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1939 transitions. [2023-11-19 07:51:17,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1939 transitions. [2023-11-19 07:51:17,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:51:17,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1939 transitions. [2023-11-19 07:51:17,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 138.5) internal successors, (1939), 14 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:17,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:17,277 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:17,278 INFO L175 Difference]: Start difference. First operand has 83 places, 52 transitions, 211 flow. Second operand 14 states and 1939 transitions. [2023-11-19 07:51:17,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 287 transitions, 1673 flow [2023-11-19 07:51:17,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 287 transitions, 1635 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-19 07:51:17,849 INFO L231 Difference]: Finished difference. Result has 103 places, 72 transitions, 438 flow [2023-11-19 07:51:17,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=103, PETRI_TRANSITIONS=72} [2023-11-19 07:51:17,850 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-11-19 07:51:17,850 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 72 transitions, 438 flow [2023-11-19 07:51:17,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.64285714285714) internal successors, (1745), 14 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:51:17,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:51:17,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:51:17,853 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-19 07:51:17,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1470689458, now seen corresponding path program 7 times [2023-11-19 07:51:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:17,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604806896] [2023-11-19 07:51:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat