./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --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_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/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_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/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_1ad05f50-26a3-48e8-9217-bad8c44faf4d/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 b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:20,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:20,680 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:45:20,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:20,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:20,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:20,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:20,729 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:20,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:20,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:20,736 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:20,737 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:20,737 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:20,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:20,740 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:20,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:20,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:20,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:20,742 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:45:20,742 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:45:20,743 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:45:20,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:20,744 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:45:20,746 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:45:20,746 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:20,747 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:20,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:20,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:20,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:20,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:20,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:20,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:20,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:20,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:20,753 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:20,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:20,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:20,754 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:20,754 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_1ad05f50-26a3-48e8-9217-bad8c44faf4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 [2023-11-19 07:45:21,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:21,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:21,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:21,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:21,119 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:21,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-19 07:45:24,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:24,580 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:24,580 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-19 07:45:24,597 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/data/6896136d3/bf09f63761b14fd7bed488909d26aa26/FLAG785822d53 [2023-11-19 07:45:24,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/data/6896136d3/bf09f63761b14fd7bed488909d26aa26 [2023-11-19 07:45:24,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:24,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:24,625 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:24,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:24,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:24,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:24" (1/1) ... [2023-11-19 07:45:24,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2518296d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:24, skipping insertion in model container [2023-11-19 07:45:24,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:24" (1/1) ... [2023-11-19 07:45:24,706 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:25,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:25,167 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:25,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:25,301 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:25,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25 WrapperNode [2023-11-19 07:45:25,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:25,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:25,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:25,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:25,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,379 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 100 [2023-11-19 07:45:25,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:25,381 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:25,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:25,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:25,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,408 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:25,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:25,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:25,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:25,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (1/1) ... [2023-11-19 07:45:25,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:25,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:25,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:45:25,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:45:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:45:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:25,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:45:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:45:25,510 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:45:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:45:25,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:25,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:25,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:25,512 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 07:45:25,704 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:25,707 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:26,006 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:26,016 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:26,016 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 07:45:26,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:26 BoogieIcfgContainer [2023-11-19 07:45:26,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:26,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:26,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:26,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:26,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:24" (1/3) ... [2023-11-19 07:45:26,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f1acea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:26, skipping insertion in model container [2023-11-19 07:45:26,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:25" (2/3) ... [2023-11-19 07:45:26,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f1acea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:26, skipping insertion in model container [2023-11-19 07:45:26,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:26" (3/3) ... [2023-11-19 07:45:26,030 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-19 07:45:26,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:26,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:45:26,051 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:45:26,112 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:45:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,270 INFO L124 PetriNetUnfolderBase]: 32/217 cut-off events. [2023-11-19 07:45:26,270 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:45:26,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 32/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-11-19 07:45:26,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:26,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,315 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 145 transitions, 297 flow [2023-11-19 07:45:26,393 INFO L124 PetriNetUnfolderBase]: 32/217 cut-off events. [2023-11-19 07:45:26,394 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:45:26,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 32/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-11-19 07:45:26,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 5460 [2023-11-19 07:45:29,868 INFO L134 LiptonReduction]: Checked pairs total: 15249 [2023-11-19 07:45:29,869 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-19 07:45:29,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:29,892 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;@259baa6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:29,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:45:29,895 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:29,895 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:45:29,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:29,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:29,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:29,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:29,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 17573, now seen corresponding path program 1 times [2023-11-19 07:45:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175952449] [2023-11-19 07:45:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:30,296 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 07:45:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175952449] [2023-11-19 07:45:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175952449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656854417] [2023-11-19 07:45:30,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:30,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 258 [2023-11-19 07:45:30,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 64 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 07:45:30,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:30,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 258 [2023-11-19 07:45:30,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:30,633 INFO L124 PetriNetUnfolderBase]: 199/467 cut-off events. [2023-11-19 07:45:30,633 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:45:30,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 467 events. 199/467 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2190 event pairs, 126 based on Foata normal form. 65/442 useless extension candidates. Maximal degree in co-relation 856. Up to 404 conditions per place. [2023-11-19 07:45:30,640 INFO L140 encePairwiseOnDemand]: 239/258 looper letters, 43 selfloop transitions, 2 changer transitions 1/59 dead transitions. [2023-11-19 07:45:30,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 217 flow [2023-11-19 07:45:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-19 07:45:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2023-11-19 07:45:30,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-19 07:45:30,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-19 07:45:30,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:30,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-19 07:45:30,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 07:45:30,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 07:45:30,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 07:45:30,693 INFO L175 Difference]: Start difference. First operand has 50 places, 64 transitions, 135 flow. Second operand 3 states and 420 transitions. [2023-11-19 07:45:30,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 217 flow [2023-11-19 07:45:30,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:30,702 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 111 flow [2023-11-19 07:45:30,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 07:45:30,709 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-11-19 07:45:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 111 flow [2023-11-19 07:45:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 07:45:30,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:30,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:30,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:45:30,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:30,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash 17574, now seen corresponding path program 1 times [2023-11-19 07:45:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:30,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69890865] [2023-11-19 07:45:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:30,842 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 07:45:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69890865] [2023-11-19 07:45:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69890865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:30,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149407192] [2023-11-19 07:45:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:30,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 258 [2023-11-19 07:45:30,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 07:45:30,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:30,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 258 [2023-11-19 07:45:30,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:31,026 INFO L124 PetriNetUnfolderBase]: 172/417 cut-off events. [2023-11-19 07:45:31,027 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:45:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 417 events. 172/417 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1870 event pairs, 144 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 794. Up to 340 conditions per place. [2023-11-19 07:45:31,034 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 39 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-19 07:45:31,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 207 flow [2023-11-19 07:45:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-11-19 07:45:31,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2023-11-19 07:45:31,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-11-19 07:45:31,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-11-19 07:45:31,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:31,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-11-19 07:45:31,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 07:45:31,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 07:45:31,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 07:45:31,044 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 111 flow. Second operand 3 states and 388 transitions. [2023-11-19 07:45:31,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 207 flow [2023-11-19 07:45:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:31,048 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 107 flow [2023-11-19 07:45:31,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-19 07:45:31,050 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-19 07:45:31,051 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 107 flow [2023-11-19 07:45:31,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 07:45:31,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:31,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:45:31,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:45:31,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:31,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 523893796, now seen corresponding path program 1 times [2023-11-19 07:45:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758963555] [2023-11-19 07:45:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:31,308 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 07:45:31,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758963555] [2023-11-19 07:45:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758963555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038285123] [2023-11-19 07:45:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:31,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:31,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:31,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:31,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:31,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:31,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:31,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:45:31,607 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 07:45:31,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:31,690 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 07:45:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038285123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:31,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:45:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308202035] [2023-11-19 07:45:31,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:45:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:45:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:45:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-11-19 07:45:31,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 107 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 07:45:31,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:31,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-11-19 07:45:31,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:32,013 INFO L124 PetriNetUnfolderBase]: 19/66 cut-off events. [2023-11-19 07:45:32,013 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:45:32,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 66 events. 19/66 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 6 based on Foata normal form. 9/72 useless extension candidates. Maximal degree in co-relation 123. Up to 36 conditions per place. [2023-11-19 07:45:32,015 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 21 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-19 07:45:32,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 120 flow [2023-11-19 07:45:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:45:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:45:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 477 transitions. [2023-11-19 07:45:32,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2023-11-19 07:45:32,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 477 transitions. [2023-11-19 07:45:32,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 477 transitions. [2023-11-19 07:45:32,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:32,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 477 transitions. [2023-11-19 07:45:32,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 07:45:32,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 07:45:32,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 07:45:32,025 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 107 flow. Second operand 4 states and 477 transitions. [2023-11-19 07:45:32,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 120 flow [2023-11-19 07:45:32,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:32,028 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-19 07:45:32,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-19 07:45:32,029 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -21 predicate places. [2023-11-19 07:45:32,030 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-19 07:45:32,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 07:45:32,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:32,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:45:32,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:32,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:32,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:32,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -939161134, now seen corresponding path program 1 times [2023-11-19 07:45:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:32,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886453676] [2023-11-19 07:45:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:32,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:45:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:32,325 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:45:32,325 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:45:32,326 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:45:32,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:45:32,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:45:32,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:45:32,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:45:32,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:45:32,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:45:32,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:45:32,333 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:45:32,335 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:45:32,336 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:45:32,379 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:45:32,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,447 INFO L124 PetriNetUnfolderBase]: 54/357 cut-off events. [2023-11-19 07:45:32,447 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:45:32,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 357 events. 54/357 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1377 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-11-19 07:45:32,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:32,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 182 transitions, 380 flow [2023-11-19 07:45:32,520 INFO L124 PetriNetUnfolderBase]: 54/357 cut-off events. [2023-11-19 07:45:32,520 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:45:32,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 357 events. 54/357 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1377 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-11-19 07:45:32,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 14140 [2023-11-19 07:45:35,770 INFO L134 LiptonReduction]: Checked pairs total: 44955 [2023-11-19 07:45:35,771 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-11-19 07:45:35,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:35,775 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;@259baa6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:35,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:45:35,777 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:35,777 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:45:35,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:35,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:35,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:35,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:35,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 28779, now seen corresponding path program 1 times [2023-11-19 07:45:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444704938] [2023-11-19 07:45:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:35,812 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 07:45:35,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:35,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444704938] [2023-11-19 07:45:35,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444704938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:35,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:35,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586987933] [2023-11-19 07:45:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:35,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 313 [2023-11-19 07:45:35,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 92 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 07:45:35,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:35,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 313 [2023-11-19 07:45:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:37,088 INFO L124 PetriNetUnfolderBase]: 5225/8773 cut-off events. [2023-11-19 07:45:37,089 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-19 07:45:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 8773 events. 5225/8773 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 60100 event pairs, 4247 based on Foata normal form. 1563/8912 useless extension candidates. Maximal degree in co-relation 4599. Up to 7248 conditions per place. [2023-11-19 07:45:37,160 INFO L140 encePairwiseOnDemand]: 287/313 looper letters, 67 selfloop transitions, 2 changer transitions 1/90 dead transitions. [2023-11-19 07:45:37,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 336 flow [2023-11-19 07:45:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-11-19 07:45:37,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718849840255591 [2023-11-19 07:45:37,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-11-19 07:45:37,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-11-19 07:45:37,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:37,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-11-19 07:45:37,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 07:45:37,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 07:45:37,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 07:45:37,171 INFO L175 Difference]: Start difference. First operand has 72 places, 92 transitions, 200 flow. Second operand 3 states and 537 transitions. [2023-11-19 07:45:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 336 flow [2023-11-19 07:45:37,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:37,177 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 154 flow [2023-11-19 07:45:37,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-11-19 07:45:37,178 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-19 07:45:37,179 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 154 flow [2023-11-19 07:45:37,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 07:45:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:37,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:45:37,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash 28778, now seen corresponding path program 1 times [2023-11-19 07:45:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115466051] [2023-11-19 07:45:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:37,305 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 07:45:37,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115466051] [2023-11-19 07:45:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115466051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:37,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482460067] [2023-11-19 07:45:37,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:37,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 313 [2023-11-19 07:45:37,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 07:45:37,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:37,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 313 [2023-11-19 07:45:37,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:38,393 INFO L124 PetriNetUnfolderBase]: 4962/8200 cut-off events. [2023-11-19 07:45:38,393 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-19 07:45:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16044 conditions, 8200 events. 4962/8200 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 54766 event pairs, 3440 based on Foata normal form. 0/7108 useless extension candidates. Maximal degree in co-relation 15083. Up to 7627 conditions per place. [2023-11-19 07:45:38,466 INFO L140 encePairwiseOnDemand]: 309/313 looper letters, 57 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-19 07:45:38,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 296 flow [2023-11-19 07:45:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-11-19 07:45:38,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531416400425985 [2023-11-19 07:45:38,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-11-19 07:45:38,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-11-19 07:45:38,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:38,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-11-19 07:45:38,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 07:45:38,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 07:45:38,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 07:45:38,476 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 154 flow. Second operand 3 states and 499 transitions. [2023-11-19 07:45:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 296 flow [2023-11-19 07:45:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:38,494 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 164 flow [2023-11-19 07:45:38,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-19 07:45:38,500 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-19 07:45:38,500 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 164 flow [2023-11-19 07:45:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 07:45:38,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:38,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:45:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:45:38,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:38,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash 831592346, now seen corresponding path program 1 times [2023-11-19 07:45:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114024054] [2023-11-19 07:45:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:38,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:38,659 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 07:45:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:38,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114024054] [2023-11-19 07:45:38,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114024054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198910792] [2023-11-19 07:45:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:38,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:38,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:38,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:38,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:45:38,824 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 07:45:38,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:38,895 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 07:45:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198910792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:38,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:38,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:45:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87777222] [2023-11-19 07:45:38,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:45:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:45:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:45:39,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 313 [2023-11-19 07:45:39,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 144.71428571428572) internal successors, (1013), 7 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:39,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:39,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 313 [2023-11-19 07:45:39,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:40,285 INFO L124 PetriNetUnfolderBase]: 4582/7480 cut-off events. [2023-11-19 07:45:40,285 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-11-19 07:45:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14812 conditions, 7480 events. 4582/7480 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 48642 event pairs, 996 based on Foata normal form. 10/6634 useless extension candidates. Maximal degree in co-relation 8669. Up to 5987 conditions per place. [2023-11-19 07:45:40,352 INFO L140 encePairwiseOnDemand]: 309/313 looper letters, 99 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2023-11-19 07:45:40,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 478 flow [2023-11-19 07:45:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:45:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:45:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-11-19 07:45:40,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246006389776358 [2023-11-19 07:45:40,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-11-19 07:45:40,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-11-19 07:45:40,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:40,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-11-19 07:45:40,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 07:45:40,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states 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 07:45:40,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states 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 07:45:40,366 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 164 flow. Second operand 5 states and 821 transitions. [2023-11-19 07:45:40,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 478 flow [2023-11-19 07:45:40,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 123 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:40,371 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 166 flow [2023-11-19 07:45:40,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-11-19 07:45:40,373 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-19 07:45:40,373 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 166 flow [2023-11-19 07:45:40,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.71428571428572) internal successors, (1013), 7 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:40,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:40,374 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:45:40,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:45:40,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:40,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1807201004, now seen corresponding path program 1 times [2023-11-19 07:45:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093382786] [2023-11-19 07:45:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:40,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:45:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:40,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:45:40,638 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:45:40,638 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:45:40,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:45:40,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:45:40,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:45:40,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:45:40,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:45:40,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:45:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:45:40,644 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:45:40,651 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:45:40,651 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:45:40,691 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:45:40,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,782 INFO L124 PetriNetUnfolderBase]: 81/542 cut-off events. [2023-11-19 07:45:40,783 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:45:40,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 542 events. 81/542 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2279 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 365. Up to 16 conditions per place. [2023-11-19 07:45:40,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:40,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 219 transitions, 465 flow [2023-11-19 07:45:40,878 INFO L124 PetriNetUnfolderBase]: 81/542 cut-off events. [2023-11-19 07:45:40,878 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:45:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 542 events. 81/542 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2279 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 365. Up to 16 conditions per place. [2023-11-19 07:45:40,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 25200 [2023-11-19 07:45:44,534 INFO L134 LiptonReduction]: Checked pairs total: 89223 [2023-11-19 07:45:44,534 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-11-19 07:45:44,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:44,537 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;@259baa6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:44,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:45:44,539 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:44,539 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:45:44,539 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:44,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:44,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:44,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:44,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash 41609, now seen corresponding path program 1 times [2023-11-19 07:45:44,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201480894] [2023-11-19 07:45:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:44,568 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 07:45:44,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:44,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201480894] [2023-11-19 07:45:44,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201480894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:44,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:44,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:44,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859644335] [2023-11-19 07:45:44,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:44,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:44,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:44,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:44,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 364 [2023-11-19 07:45:44,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 07:45:44,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:44,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 364 [2023-11-19 07:45:44,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:55,176 INFO L124 PetriNetUnfolderBase]: 65397/97028 cut-off events. [2023-11-19 07:45:55,177 INFO L125 PetriNetUnfolderBase]: For 1271/1271 co-relation queries the response was YES. [2023-11-19 07:45:55,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186539 conditions, 97028 events. 65397/97028 cut-off events. For 1271/1271 co-relation queries the response was YES. Maximal size of possible extension queue 2726. Compared 782890 event pairs, 52513 based on Foata normal form. 20402/104482 useless extension candidates. Maximal degree in co-relation 26766. Up to 79775 conditions per place. [2023-11-19 07:45:55,876 INFO L140 encePairwiseOnDemand]: 331/364 looper letters, 83 selfloop transitions, 2 changer transitions 2/118 dead transitions. [2023-11-19 07:45:55,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 437 flow [2023-11-19 07:45:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-11-19 07:45:55,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989010989010989 [2023-11-19 07:45:55,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-11-19 07:45:55,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-11-19 07:45:55,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:55,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-11-19 07:45:55,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 07:45:55,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 07:45:55,889 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 267 flow. Second operand 3 states and 654 transitions. [2023-11-19 07:45:55,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 437 flow [2023-11-19 07:45:55,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:55,896 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 205 flow [2023-11-19 07:45:55,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-11-19 07:45:55,898 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2023-11-19 07:45:55,898 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 205 flow [2023-11-19 07:45:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 07:45:55,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:55,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:45:55,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:45:55,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:45:55,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 41611, now seen corresponding path program 1 times [2023-11-19 07:45:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929523604] [2023-11-19 07:45:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:55,962 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 07:45:55,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:55,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929523604] [2023-11-19 07:45:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929523604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:55,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:45:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699772911] [2023-11-19 07:45:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:56,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 364 [2023-11-19 07:45:56,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 07:45:56,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:56,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 364 [2023-11-19 07:45:56,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:03,807 INFO L124 PetriNetUnfolderBase]: 59217/87478 cut-off events. [2023-11-19 07:46:03,807 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2023-11-19 07:46:04,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169797 conditions, 87478 events. 59217/87478 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 2433. Compared 687465 event pairs, 34340 based on Foata normal form. 0/79074 useless extension candidates. Maximal degree in co-relation 159580. Up to 80357 conditions per place. [2023-11-19 07:46:04,541 INFO L140 encePairwiseOnDemand]: 360/364 looper letters, 66 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-19 07:46:04,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 365 flow [2023-11-19 07:46:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:46:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-19 07:46:04,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2023-11-19 07:46:04,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-19 07:46:04,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-19 07:46:04,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:04,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-19 07:46:04,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 07:46:04,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 07:46:04,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 07:46:04,555 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 205 flow. Second operand 3 states and 595 transitions. [2023-11-19 07:46:04,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 365 flow [2023-11-19 07:46:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:46:05,332 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 215 flow [2023-11-19 07:46:05,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2023-11-19 07:46:05,333 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2023-11-19 07:46:05,333 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 215 flow [2023-11-19 07:46:05,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 07:46:05,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:05,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:46:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:46:05,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:46:05,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -192716704, now seen corresponding path program 1 times [2023-11-19 07:46:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:05,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508095722] [2023-11-19 07:46:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:05,469 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 07:46:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:05,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508095722] [2023-11-19 07:46:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508095722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:46:05,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423238152] [2023-11-19 07:46:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:05,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:05,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad05f50-26a3-48e8-9217-bad8c44faf4d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:46:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:05,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:46:05,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:05,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:46:05,627 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 07:46:05,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:05,679 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 07:46:05,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423238152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:46:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:46:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057954218] [2023-11-19 07:46:05,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:05,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:46:05,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:46:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:46:05,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 364 [2023-11-19 07:46:05,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 215 flow. Second operand has 7 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 07:46:05,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:05,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 364 [2023-11-19 07:46:05,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand