./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx --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 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:05:07,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:05:07,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:05:07,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:05:07,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:05:07,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:05:07,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:05:07,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:05:07,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:05:07,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:05:07,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:05:07,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:05:07,254 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:05:07,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:05:07,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:05:07,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:05:07,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:05:07,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:05:07,261 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:05:07,261 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:05:07,265 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:05:07,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:05:07,267 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:05:07,267 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:05:07,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:05:07,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:05:07,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:05:07,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:05:07,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:05:07,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:05:07,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:07,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:05:07,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:05:07,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:05:07,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:05:07,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:05:07,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:05:07,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:05:07,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:05:07,274 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_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2023-11-21 22:05:07,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:05:07,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:05:07,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:05:07,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:05:07,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:05:07,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread/fib_safe-11.i [2023-11-21 22:05:10,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:05:11,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:05:11,216 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/sv-benchmarks/c/pthread/fib_safe-11.i [2023-11-21 22:05:11,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/data/51e9664a5/5274ec0e1f7045249efdb37f385afe3f/FLAG002892b47 [2023-11-21 22:05:11,260 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/data/51e9664a5/5274ec0e1f7045249efdb37f385afe3f [2023-11-21 22:05:11,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:05:11,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:05:11,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:11,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:05:11,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:05:11,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:11,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299bb067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11, skipping insertion in model container [2023-11-21 22:05:11,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:11,346 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:11,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:11,826 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:05:11,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:11,923 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:05:11,923 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:05:11,932 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:05:11,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11 WrapperNode [2023-11-21 22:05:11,933 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:11,934 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:11,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:05:11,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:05:11,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:11,983 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,021 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-21 22:05:12,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:12,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:05:12,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:05:12,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:05:12,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,067 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:05:12,095 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:05:12,095 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:05:12,095 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:05:12,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (1/1) ... [2023-11-21 22:05:12,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:12,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:05:12,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:05:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-21 22:05:12,200 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-21 22:05:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-21 22:05:12,200 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-21 22:05:12,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:05:12,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:05:12,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:05:12,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:05:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:05:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:05:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:05:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:05:12,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:05:12,205 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:05:12,509 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:05:12,512 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:05:12,761 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:05:12,955 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:05:12,955 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:05:12,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:12 BoogieIcfgContainer [2023-11-21 22:05:12,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:05:12,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:05:12,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:05:12,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:05:12,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:05:11" (1/3) ... [2023-11-21 22:05:12,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c689c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:12, skipping insertion in model container [2023-11-21 22:05:12,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:11" (2/3) ... [2023-11-21 22:05:12,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c689c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:12, skipping insertion in model container [2023-11-21 22:05:12,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:12" (3/3) ... [2023-11-21 22:05:12,973 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2023-11-21 22:05:12,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:05:12,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-21 22:05:12,993 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:05:13,035 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:05:13,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 88 flow [2023-11-21 22:05:13,125 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-21 22:05:13,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:13,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 38 events. 5/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-21 22:05:13,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 88 flow [2023-11-21 22:05:13,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 82 flow [2023-11-21 22:05:13,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:13,173 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;@14a909aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:13,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-21 22:05:13,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:05:13,188 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-21 22:05:13,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:13,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:13,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:13,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 265637985, now seen corresponding path program 1 times [2023-11-21 22:05:13,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:13,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467288977] [2023-11-21 22:05:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:13,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:13,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467288977] [2023-11-21 22:05:13,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467288977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:13,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:13,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564719424] [2023-11-21 22:05:13,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:13,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-21 22:05:13,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:13,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-21 22:05:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:13,928 INFO L124 PetriNetUnfolderBase]: 133/268 cut-off events. [2023-11-21 22:05:13,929 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:05:13,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 268 events. 133/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 911 event pairs, 56 based on Foata normal form. 18/266 useless extension candidates. Maximal degree in co-relation 468. Up to 151 conditions per place. [2023-11-21 22:05:13,936 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-11-21 22:05:13,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 136 flow [2023-11-21 22:05:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-21 22:05:13,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2023-11-21 22:05:13,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-21 22:05:13,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-21 22:05:13,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:13,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-21 22:05:13,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,965 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 82 flow. Second operand 3 states and 79 transitions. [2023-11-21 22:05:13,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 136 flow [2023-11-21 22:05:13,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:13,972 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 74 flow [2023-11-21 22:05:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-21 22:05:13,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-21 22:05:13,978 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 74 flow [2023-11-21 22:05:13,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:13,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:13,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:13,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:05:13,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:13,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 265637986, now seen corresponding path program 1 times [2023-11-21 22:05:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946295424] [2023-11-21 22:05:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:14,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:14,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946295424] [2023-11-21 22:05:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946295424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:14,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:14,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251185332] [2023-11-21 22:05:14,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:14,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:14,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-21 22:05:14,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:14,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-21 22:05:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:14,477 INFO L124 PetriNetUnfolderBase]: 115/240 cut-off events. [2023-11-21 22:05:14,477 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:05:14,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 240 events. 115/240 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 810 event pairs, 56 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 423. Up to 150 conditions per place. [2023-11-21 22:05:14,484 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-21 22:05:14,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 130 flow [2023-11-21 22:05:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-21 22:05:14,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-21 22:05:14,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:14,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,497 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 74 flow. Second operand 3 states and 78 transitions. [2023-11-21 22:05:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 130 flow [2023-11-21 22:05:14,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:14,503 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 72 flow [2023-11-21 22:05:14,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-21 22:05:14,504 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-21 22:05:14,505 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 72 flow [2023-11-21 22:05:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:14,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:14,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:05:14,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281308, now seen corresponding path program 1 times [2023-11-21 22:05:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:14,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483948957] [2023-11-21 22:05:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:14,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483948957] [2023-11-21 22:05:14,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483948957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:14,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:14,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805632694] [2023-11-21 22:05:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:14,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:14,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2023-11-21 22:05:14,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:14,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2023-11-21 22:05:14,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:14,690 INFO L124 PetriNetUnfolderBase]: 118/242 cut-off events. [2023-11-21 22:05:14,690 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:05:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 242 events. 118/242 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 798 event pairs, 58 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 431. Up to 156 conditions per place. [2023-11-21 22:05:14,693 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-21 22:05:14,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 130 flow [2023-11-21 22:05:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-21 22:05:14,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-21 22:05:14,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-21 22:05:14,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-21 22:05:14,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:14,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-21 22:05:14,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,699 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 72 flow. Second operand 3 states and 76 transitions. [2023-11-21 22:05:14,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 130 flow [2023-11-21 22:05:14,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:14,702 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-11-21 22:05:14,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-21 22:05:14,703 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-21 22:05:14,703 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-11-21 22:05:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:14,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:05:14,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2003281307, now seen corresponding path program 1 times [2023-11-21 22:05:14,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:14,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297341111] [2023-11-21 22:05:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297341111] [2023-11-21 22:05:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297341111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:14,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:14,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615507643] [2023-11-21 22:05:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:14,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2023-11-21 22:05:14,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:14,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2023-11-21 22:05:14,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:14,925 INFO L124 PetriNetUnfolderBase]: 115/238 cut-off events. [2023-11-21 22:05:14,926 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:05:14,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 238 events. 115/238 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 795 event pairs, 56 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 421. Up to 150 conditions per place. [2023-11-21 22:05:14,931 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-21 22:05:14,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 126 flow [2023-11-21 22:05:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-21 22:05:14,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-21 22:05:14,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:14,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-21 22:05:14,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,943 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 78 transitions. [2023-11-21 22:05:14,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 126 flow [2023-11-21 22:05:14,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:14,946 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-11-21 22:05:14,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-21 22:05:14,950 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-11-21 22:05:14,950 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-11-21 22:05:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:14,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:14,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:05:14,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:14,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 581954235, now seen corresponding path program 1 times [2023-11-21 22:05:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:14,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252750773] [2023-11-21 22:05:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:14,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:15,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252750773] [2023-11-21 22:05:15,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252750773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:15,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:15,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249854305] [2023-11-21 22:05:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:15,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:15,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-21 22:05:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-21 22:05:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:15,128 INFO L124 PetriNetUnfolderBase]: 133/265 cut-off events. [2023-11-21 22:05:15,129 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:05:15,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 265 events. 133/265 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 867 event pairs, 20 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 475. Up to 145 conditions per place. [2023-11-21 22:05:15,132 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-21 22:05:15,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 130 flow [2023-11-21 22:05:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-21 22:05:15,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-21 22:05:15,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-21 22:05:15,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-21 22:05:15,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:15,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-21 22:05:15,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,137 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 82 transitions. [2023-11-21 22:05:15,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 130 flow [2023-11-21 22:05:15,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:15,140 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 76 flow [2023-11-21 22:05:15,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-21 22:05:15,141 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-21 22:05:15,142 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 76 flow [2023-11-21 22:05:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:15,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:05:15,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:15,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 81967731, now seen corresponding path program 1 times [2023-11-21 22:05:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391161346] [2023-11-21 22:05:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391161346] [2023-11-21 22:05:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391161346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271657232] [2023-11-21 22:05:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:15,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:15,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:05:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:15,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:05:15,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271657232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:15,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:05:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417443089] [2023-11-21 22:05:15,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:05:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:05:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:05:15,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-21 22:05:15,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:15,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-21 22:05:15,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:15,571 INFO L124 PetriNetUnfolderBase]: 187/346 cut-off events. [2023-11-21 22:05:15,571 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:05:15,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 346 events. 187/346 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1068 event pairs, 20 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 691. Up to 145 conditions per place. [2023-11-21 22:05:15,575 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-11-21 22:05:15,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 226 flow [2023-11-21 22:05:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:05:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:05:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2023-11-21 22:05:15,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-21 22:05:15,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 162 transitions. [2023-11-21 22:05:15,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 162 transitions. [2023-11-21 22:05:15,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:15,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 162 transitions. [2023-11-21 22:05:15,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,581 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 76 flow. Second operand 6 states and 162 transitions. [2023-11-21 22:05:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 226 flow [2023-11-21 22:05:15,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:15,584 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 110 flow [2023-11-21 22:05:15,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-11-21 22:05:15,585 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-21 22:05:15,586 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 110 flow [2023-11-21 22:05:15,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:15,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:15,587 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:15,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:15,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:15,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:15,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2134763333, now seen corresponding path program 2 times [2023-11-21 22:05:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092638887] [2023-11-21 22:05:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:15,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:15,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092638887] [2023-11-21 22:05:15,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092638887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555030014] [2023-11-21 22:05:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:05:15,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:15,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:15,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:15,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:05:16,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:05:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:16,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:05:16,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:05:16,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:16,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555030014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:16,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:05:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-21 22:05:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430466278] [2023-11-21 22:05:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:05:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:05:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:05:17,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-21 22:05:17,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:17,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-21 22:05:17,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:17,377 INFO L124 PetriNetUnfolderBase]: 187/337 cut-off events. [2023-11-21 22:05:17,377 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-21 22:05:17,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 337 events. 187/337 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 991 event pairs, 104 based on Foata normal form. 9/337 useless extension candidates. Maximal degree in co-relation 772. Up to 259 conditions per place. [2023-11-21 22:05:17,382 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 20 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-21 22:05:17,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 176 flow [2023-11-21 22:05:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:05:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:05:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2023-11-21 22:05:17,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2023-11-21 22:05:17,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 77 transitions. [2023-11-21 22:05:17,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 77 transitions. [2023-11-21 22:05:17,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:17,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 77 transitions. [2023-11-21 22:05:17,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,392 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 110 flow. Second operand 4 states and 77 transitions. [2023-11-21 22:05:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 176 flow [2023-11-21 22:05:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 162 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:17,399 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-11-21 22:05:17,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-11-21 22:05:17,400 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-21 22:05:17,400 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-11-21 22:05:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:17,401 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:17,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:17,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:17,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2134762226, now seen corresponding path program 1 times [2023-11-21 22:05:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13402273] [2023-11-21 22:05:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13402273] [2023-11-21 22:05:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13402273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309211453] [2023-11-21 22:05:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:17,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:17,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:17,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:17,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:05:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:17,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:05:17,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:17,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309211453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:17,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-21 22:05:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596908457] [2023-11-21 22:05:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:05:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:05:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:05:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-21 22:05:17,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:17,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:17,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-21 22:05:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:18,219 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2023-11-21 22:05:18,219 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-21 22:05:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 472 events. 277/472 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1298 event pairs, 20 based on Foata normal form. 54/520 useless extension candidates. Maximal degree in co-relation 1105. Up to 118 conditions per place. [2023-11-21 22:05:18,225 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 75 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-11-21 22:05:18,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 98 transitions, 422 flow [2023-11-21 22:05:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:05:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:05:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2023-11-21 22:05:18,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 22:05:18,228 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 320 transitions. [2023-11-21 22:05:18,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 320 transitions. [2023-11-21 22:05:18,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:18,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 320 transitions. [2023-11-21 22:05:18,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,233 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,233 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 12 states and 320 transitions. [2023-11-21 22:05:18,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 98 transitions, 422 flow [2023-11-21 22:05:18,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 98 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:18,239 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 177 flow [2023-11-21 22:05:18,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-11-21 22:05:18,243 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-11-21 22:05:18,243 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 177 flow [2023-11-21 22:05:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:18,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:18,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:18,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:18,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -226475506, now seen corresponding path program 2 times [2023-11-21 22:05:18,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:18,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898322941] [2023-11-21 22:05:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:18,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898322941] [2023-11-21 22:05:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898322941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522650099] [2023-11-21 22:05:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:05:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:18,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:18,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:05:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:05:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:18,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:05:18,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:18,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522650099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:19,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-21 22:05:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185720494] [2023-11-21 22:05:19,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:19,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:05:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:05:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:05:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-21 22:05:19,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 177 flow. Second operand has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-21 22:05:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:19,546 INFO L124 PetriNetUnfolderBase]: 493/796 cut-off events. [2023-11-21 22:05:19,546 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-21 22:05:19,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 796 events. 493/796 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2099 event pairs, 20 based on Foata normal form. 108/898 useless extension candidates. Maximal degree in co-relation 2284. Up to 190 conditions per place. [2023-11-21 22:05:19,558 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 147 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2023-11-21 22:05:19,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 182 transitions, 877 flow [2023-11-21 22:05:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:05:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-21 22:05:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 638 transitions. [2023-11-21 22:05:19,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2023-11-21 22:05:19,562 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 638 transitions. [2023-11-21 22:05:19,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 638 transitions. [2023-11-21 22:05:19,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:19,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 638 transitions. [2023-11-21 22:05:19,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 26.583333333333332) internal successors, (638), 24 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:19,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:19,571 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 40.0) internal successors, (1000), 25 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:19,571 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 177 flow. Second operand 24 states and 638 transitions. [2023-11-21 22:05:19,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 182 transitions, 877 flow [2023-11-21 22:05:19,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 805 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-21 22:05:19,586 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 297 flow [2023-11-21 22:05:19,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=297, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2023-11-21 22:05:19,588 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2023-11-21 22:05:19,588 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 297 flow [2023-11-21 22:05:19,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 20.32) internal successors, (508), 25 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:19,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:19,589 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:19,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 22:05:19,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:19,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1728230386, now seen corresponding path program 3 times [2023-11-21 22:05:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916674433] [2023-11-21 22:05:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916674433] [2023-11-21 22:05:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916674433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250053256] [2023-11-21 22:05:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:05:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:20,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:20,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:05:20,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-21 22:05:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:20,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 22:05:20,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:20,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250053256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:21,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-11-21 22:05:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598102568] [2023-11-21 22:05:21,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:21,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:05:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:05:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:05:21,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2023-11-21 22:05:21,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 297 flow. Second operand has 27 states, 27 states have (on average 20.333333333333332) internal successors, (549), 27 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:21,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:21,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2023-11-21 22:05:21,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:21,635 INFO L124 PetriNetUnfolderBase]: 529/850 cut-off events. [2023-11-21 22:05:21,635 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2023-11-21 22:05:21,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 850 events. 529/850 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2229 event pairs, 20 based on Foata normal form. 18/862 useless extension candidates. Maximal degree in co-relation 2554. Up to 178 conditions per place. [2023-11-21 22:05:21,649 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 159 selfloop transitions, 25 changer transitions 0/196 dead transitions. [2023-11-21 22:05:21,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 969 flow [2023-11-21 22:05:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:05:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-21 22:05:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 680 transitions. [2023-11-21 22:05:21,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2023-11-21 22:05:21,654 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 680 transitions. [2023-11-21 22:05:21,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 680 transitions. [2023-11-21 22:05:21,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:21,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 680 transitions. [2023-11-21 22:05:21,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 26.153846153846153) internal successors, (680), 26 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:21,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 40.0) internal successors, (1080), 27 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:21,662 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 40.0) internal successors, (1080), 27 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:21,662 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 297 flow. Second operand 26 states and 680 transitions. [2023-11-21 22:05:21,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 969 flow [2023-11-21 22:05:21,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 196 transitions, 869 flow, removed 39 selfloop flow, removed 11 redundant places. [2023-11-21 22:05:21,686 INFO L231 Difference]: Finished difference. Result has 103 places, 52 transitions, 273 flow [2023-11-21 22:05:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=273, PETRI_PLACES=103, PETRI_TRANSITIONS=52} [2023-11-21 22:05:21,688 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2023-11-21 22:05:21,688 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 52 transitions, 273 flow [2023-11-21 22:05:21,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 20.333333333333332) internal successors, (549), 27 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:21,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:21,689 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:21,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:21,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:21,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 22:05:21,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2123103474, now seen corresponding path program 4 times [2023-11-21 22:05:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:21,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854253063] [2023-11-21 22:05:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:21,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:24,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854253063] [2023-11-21 22:05:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854253063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:05:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601261816] [2023-11-21 22:05:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:05:24,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:24,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:24,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1066e81-41dc-4231-a270-571941903e17/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:05:24,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:05:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:24,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-21 22:05:24,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:26,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601261816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:29,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:05:29,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 89 [2023-11-21 22:05:29,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817405882] [2023-11-21 22:05:29,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-21 22:05:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-21 22:05:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=6838, Unknown=0, NotChecked=0, Total=8010 [2023-11-21 22:05:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2023-11-21 22:05:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 52 transitions, 273 flow. Second operand has 90 states, 90 states have (on average 14.177777777777777) internal successors, (1276), 90 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2023-11-21 22:05:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand