./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/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_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/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_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:16,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:17,063 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:01:17,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:17,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:17,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:17,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:17,116 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:17,118 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:17,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:17,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:17,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:17,126 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:17,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:17,128 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:17,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:17,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:17,130 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:17,130 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:01:17,131 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:01:17,131 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:01:17,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:17,133 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:01:17,133 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:01:17,134 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:17,134 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:17,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:17,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:17,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:17,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:17,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:17,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:17,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:17,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:17,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:17,140 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:17,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:17,141 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:17,141 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_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-11-19 08:01:17,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:17,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:17,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:17,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:17,555 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:17,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-19 08:01:20,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:21,074 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:21,079 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-19 08:01:21,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/data/e5804abbc/b13740d7618e4d7a9e4c91170f6742db/FLAGd8d11fca6 [2023-11-19 08:01:21,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/data/e5804abbc/b13740d7618e4d7a9e4c91170f6742db [2023-11-19 08:01:21,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:21,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:21,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:21,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:21,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:21,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ed5f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21, skipping insertion in model container [2023-11-19 08:01:21,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,200 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:21,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:21,484 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:21,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:21,566 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:21,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21 WrapperNode [2023-11-19 08:01:21,567 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:21,568 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:21,568 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:21,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:21,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,674 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 411 [2023-11-19 08:01:21,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:21,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:21,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:21,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:21,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,724 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:21,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:21,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:21,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:21,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (1/1) ... [2023-11-19 08:01:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:21,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:21,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:01:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:01:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:01:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:01:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:01:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:21,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:21,876 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 08:01:22,092 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:22,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:23,122 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:23,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:23,153 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 08:01:23,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:23 BoogieIcfgContainer [2023-11-19 08:01:23,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:23,173 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:23,173 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:23,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:23,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:21" (1/3) ... [2023-11-19 08:01:23,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c376651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:23, skipping insertion in model container [2023-11-19 08:01:23,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:21" (2/3) ... [2023-11-19 08:01:23,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c376651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:23, skipping insertion in model container [2023-11-19 08:01:23,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:23" (3/3) ... [2023-11-19 08:01:23,182 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-19 08:01:23,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:23,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-19 08:01:23,201 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:23,438 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:01:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 543 places, 585 transitions, 1184 flow [2023-11-19 08:01:23,829 INFO L124 PetriNetUnfolderBase]: 49/583 cut-off events. [2023-11-19 08:01:23,829 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:23,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 583 events. 49/583 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1870 event pairs, 0 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 395. Up to 2 conditions per place. [2023-11-19 08:01:23,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 543 places, 585 transitions, 1184 flow [2023-11-19 08:01:23,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 536 places, 578 transitions, 1168 flow [2023-11-19 08:01:23,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:23,895 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 536 places, 578 transitions, 1168 flow [2023-11-19 08:01:23,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 536 places, 578 transitions, 1168 flow [2023-11-19 08:01:23,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 536 places, 578 transitions, 1168 flow [2023-11-19 08:01:24,100 INFO L124 PetriNetUnfolderBase]: 49/578 cut-off events. [2023-11-19 08:01:24,100 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:24,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 578 events. 49/578 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1874 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 395. Up to 2 conditions per place. [2023-11-19 08:01:24,165 INFO L119 LiptonReduction]: Number of co-enabled transitions 80940 [2023-11-19 08:01:57,908 INFO L134 LiptonReduction]: Checked pairs total: 88091 [2023-11-19 08:01:57,908 INFO L136 LiptonReduction]: Total number of compositions: 794 [2023-11-19 08:01:57,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:57,950 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;@714ccb1b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:57,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-19 08:01:57,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:57,954 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 08:01:57,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:57,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:57,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:01:57,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 08:01:57,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash 82353, now seen corresponding path program 1 times [2023-11-19 08:01:57,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135867192] [2023-11-19 08:01:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:58,292 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 08:01:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135867192] [2023-11-19 08:01:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135867192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:58,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:58,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587469348] [2023-11-19 08:01:58,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:58,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 543 out of 1379 [2023-11-19 08:01:58,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 543.6666666666666) internal successors, (1631), 3 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 08:01:58,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:58,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 543 of 1379 [2023-11-19 08:01:58,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,318 INFO L124 PetriNetUnfolderBase]: 1907/2912 cut-off events. [2023-11-19 08:01:59,318 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-19 08:01:59,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5888 conditions, 2912 events. 1907/2912 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 14930 event pairs, 1505 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 5696. Up to 2907 conditions per place. [2023-11-19 08:01:59,344 INFO L140 encePairwiseOnDemand]: 1360/1379 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-19 08:01:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 256 flow [2023-11-19 08:01:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1705 transitions. [2023-11-19 08:01:59,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41213439690597053 [2023-11-19 08:01:59,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1705 transitions. [2023-11-19 08:01:59,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1705 transitions. [2023-11-19 08:01:59,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1705 transitions. [2023-11-19 08:01:59,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 568.3333333333334) internal successors, (1705), 3 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states 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 08:01:59,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1379.0) internal successors, (5516), 4 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states 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 08:01:59,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1379.0) internal successors, (5516), 4 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states 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 08:01:59,413 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1705 transitions. [2023-11-19 08:01:59,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 256 flow [2023-11-19 08:01:59,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:59,422 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 134 flow [2023-11-19 08:01:59,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1379, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2023-11-19 08:01:59,429 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -17 predicate places. [2023-11-19 08:01:59,429 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 134 flow [2023-11-19 08:01:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 543.6666666666666) internal successors, (1631), 3 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 08:01:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:01:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:59,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 08:01:59,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash 82354, now seen corresponding path program 1 times [2023-11-19 08:01:59,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375432278] [2023-11-19 08:01:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,729 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 08:01:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375432278] [2023-11-19 08:01:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375432278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:59,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:59,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403894981] [2023-11-19 08:01:59,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:59,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 537 out of 1379 [2023-11-19 08:01:59,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 08:01:59,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 537 of 1379 [2023-11-19 08:01:59,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:00,651 INFO L124 PetriNetUnfolderBase]: 1907/2914 cut-off events. [2023-11-19 08:02:00,651 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 08:02:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 2914 events. 1907/2914 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 14718 event pairs, 1505 based on Foata normal form. 1/852 useless extension candidates. Maximal degree in co-relation 5831. Up to 2913 conditions per place. [2023-11-19 08:02:00,673 INFO L140 encePairwiseOnDemand]: 1370/1379 looper letters, 59 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-11-19 08:02:00,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 264 flow [2023-11-19 08:02:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1680 transitions. [2023-11-19 08:02:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40609137055837563 [2023-11-19 08:02:00,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1680 transitions. [2023-11-19 08:02:00,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1680 transitions. [2023-11-19 08:02:00,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1680 transitions. [2023-11-19 08:02:00,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 560.0) internal successors, (1680), 3 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states 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 08:02:00,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1379.0) internal successors, (5516), 4 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states 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 08:02:00,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1379.0) internal successors, (5516), 4 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states 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 08:02:00,704 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 134 flow. Second operand 3 states and 1680 transitions. [2023-11-19 08:02:00,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 264 flow [2023-11-19 08:02:00,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:00,708 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 156 flow [2023-11-19 08:02:00,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1379, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2023-11-19 08:02:00,712 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -16 predicate places. [2023-11-19 08:02:00,713 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 156 flow [2023-11-19 08:02:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 08:02:00,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:00,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:02:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:02:00,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 08:02:00,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2558479, now seen corresponding path program 1 times [2023-11-19 08:02:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:00,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126173208] [2023-11-19 08:02:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:00,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126173208] [2023-11-19 08:02:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126173208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746118625] [2023-11-19 08:02:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:00,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:00,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:01,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:02:01,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:01,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 08:02:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:01,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:02:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:01,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 08:02:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:01,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:02:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:01,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:02:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:01,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 08:02:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:01,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:01,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746118625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:01,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:01,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:02:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498527488] [2023-11-19 08:02:01,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:02:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:02:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:02:02,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1379 [2023-11-19 08:02:02,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 532.125) internal successors, (4257), 8 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states 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 08:02:02,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:02,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1379 [2023-11-19 08:02:02,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:02,985 INFO L124 PetriNetUnfolderBase]: 1919/2932 cut-off events. [2023-11-19 08:02:02,985 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 08:02:02,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5924 conditions, 2932 events. 1919/2932 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 14700 event pairs, 1505 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 5882. Up to 2922 conditions per place. [2023-11-19 08:02:03,009 INFO L140 encePairwiseOnDemand]: 1370/1379 looper letters, 59 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2023-11-19 08:02:03,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 393 flow [2023-11-19 08:02:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:02:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3273 transitions. [2023-11-19 08:02:03,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39557650471356054 [2023-11-19 08:02:03,023 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3273 transitions. [2023-11-19 08:02:03,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3273 transitions. [2023-11-19 08:02:03,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:03,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3273 transitions. [2023-11-19 08:02:03,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 545.5) internal successors, (3273), 6 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states 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 08:02:03,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1379.0) internal successors, (9653), 7 states have internal predecessors, (9653), 0 states have call successors, (0), 0 states 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 08:02:03,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1379.0) internal successors, (9653), 7 states have internal predecessors, (9653), 0 states have call successors, (0), 0 states 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 08:02:03,064 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 156 flow. Second operand 6 states and 3273 transitions. [2023-11-19 08:02:03,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 393 flow [2023-11-19 08:02:03,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:03,068 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 314 flow [2023-11-19 08:02:03,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1379, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2023-11-19 08:02:03,070 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-11-19 08:02:03,070 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 314 flow [2023-11-19 08:02:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 532.125) internal successors, (4257), 8 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states 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 08:02:03,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:03,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:02:03,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:03,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:03,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 08:02:03,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1077767705, now seen corresponding path program 1 times [2023-11-19 08:02:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442942929] [2023-11-19 08:02:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442942929] [2023-11-19 08:02:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442942929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973318486] [2023-11-19 08:02:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:03,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:03,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:03,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:02:03,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:02:03,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:02:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973318486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:03,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:03,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-11-19 08:02:03,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290382948] [2023-11-19 08:02:03,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:03,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:02:03,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:02:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:02:03,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1379 [2023-11-19 08:02:03,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 314 flow. Second operand has 9 states, 9 states have (on average 540.5555555555555) internal successors, (4865), 9 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states 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 08:02:03,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:03,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1379 [2023-11-19 08:02:03,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:04,600 INFO L124 PetriNetUnfolderBase]: 1909/2924 cut-off events. [2023-11-19 08:02:04,600 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:02:04,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5936 conditions, 2924 events. 1909/2924 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 14588 event pairs, 1505 based on Foata normal form. 4/866 useless extension candidates. Maximal degree in co-relation 5861. Up to 2911 conditions per place. [2023-11-19 08:02:04,630 INFO L140 encePairwiseOnDemand]: 1370/1379 looper letters, 59 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2023-11-19 08:02:04,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 408 flow [2023-11-19 08:02:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:02:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:02:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3862 transitions. [2023-11-19 08:02:04,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008287578990986 [2023-11-19 08:02:04,657 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3862 transitions. [2023-11-19 08:02:04,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3862 transitions. [2023-11-19 08:02:04,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:04,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3862 transitions. [2023-11-19 08:02:04,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 551.7142857142857) internal successors, (3862), 7 states have internal predecessors, (3862), 0 states have call successors, (0), 0 states 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 08:02:04,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1379.0) internal successors, (11032), 8 states have internal predecessors, (11032), 0 states have call successors, (0), 0 states 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 08:02:04,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1379.0) internal successors, (11032), 8 states have internal predecessors, (11032), 0 states have call successors, (0), 0 states 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 08:02:04,722 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 314 flow. Second operand 7 states and 3862 transitions. [2023-11-19 08:02:04,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 408 flow [2023-11-19 08:02:04,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 392 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:04,728 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 300 flow [2023-11-19 08:02:04,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1379, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-11-19 08:02:04,731 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-11-19 08:02:04,733 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 300 flow [2023-11-19 08:02:04,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 540.5555555555555) internal successors, (4865), 9 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states 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 08:02:04,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:04,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 08:02:04,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 08:02:04,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:04,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-19 08:02:04,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1084296974, now seen corresponding path program 2 times [2023-11-19 08:02:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616476139] [2023-11-19 08:02:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:05,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616476139] [2023-11-19 08:02:05,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616476139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:05,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373400785] [2023-11-19 08:02:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:05,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:05,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:05,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:05,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c47410d-ad6c-40ad-8c05-d69bf2f4f9aa/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:05,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:05,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:02:05,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:05,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 08:02:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:05,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 08:02:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:05,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 08:02:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:05,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:02:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:05,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 08:02:05,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:02:05,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:02:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:05,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373400785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:05,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:05,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 08:02:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888818590] [2023-11-19 08:02:05,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:05,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 08:02:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 08:02:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272