./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme --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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:41,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:41,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:53:41,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:41,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:41,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:41,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:41,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:41,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:41,222 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:41,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:41,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:41,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:41,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:41,225 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:41,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:41,226 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:41,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:41,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:41,228 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:41,228 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:53:41,229 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:53:41,230 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:53:41,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:41,232 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:53:41,233 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:53:41,233 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:41,234 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:41,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:41,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:41,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:41,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:41,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:41,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:41,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:41,238 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:41,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:41,238 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:41,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:41,239 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:41,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:41,239 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_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2023-11-26 11:53:41,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:41,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:41,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:41,607 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:41,608 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:41,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-26 11:53:44,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:45,016 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:45,018 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-26 11:53:45,036 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/data/e4019be3e/17da3ba5107a4e978f969dbd93464236/FLAG78e3a0e4c [2023-11-26 11:53:45,058 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/data/e4019be3e/17da3ba5107a4e978f969dbd93464236 [2023-11-26 11:53:45,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:45,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:45,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:45,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:45,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:45,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6119edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45, skipping insertion in model container [2023-11-26 11:53:45,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:45,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:45,570 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:45,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:45,686 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:53:45,686 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:53:45,695 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:45,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45 WrapperNode [2023-11-26 11:53:45,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:45,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:45,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:45,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:45,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,763 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-11-26 11:53:45,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:45,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:45,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:45,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:45,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,781 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,797 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 11:53:45,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:45,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:45,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:45,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:45,818 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (1/1) ... [2023-11-26 11:53:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:45,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:45,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:53:45,904 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:53:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:53:45,906 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:53:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:53:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:53:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:53:45,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:53:45,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:45,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:53:45,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:53:45,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:53:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:53:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:53:45,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:45,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:45,915 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:53:46,109 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:46,111 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:46,280 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:46,432 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:46,432 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:53:46,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:46 BoogieIcfgContainer [2023-11-26 11:53:46,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:46,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:46,437 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:46,441 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:46,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:45" (1/3) ... [2023-11-26 11:53:46,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eba431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:46, skipping insertion in model container [2023-11-26 11:53:46,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:45" (2/3) ... [2023-11-26 11:53:46,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eba431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:46, skipping insertion in model container [2023-11-26 11:53:46,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:46" (3/3) ... [2023-11-26 11:53:46,445 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-11-26 11:53:46,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:46,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-26 11:53:46,466 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:53:46,507 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:53:46,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 35 transitions, 78 flow [2023-11-26 11:53:46,578 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-11-26 11:53:46,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:53:46,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2023-11-26 11:53:46,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 35 transitions, 78 flow [2023-11-26 11:53:46,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 33 transitions, 72 flow [2023-11-26 11:53:46,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:46,605 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;@a383731, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:46,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-26 11:53:46,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:53:46,610 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:53:46,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:53:46,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:46,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:53:46,612 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)] === [2023-11-26 11:53:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 6737, now seen corresponding path program 1 times [2023-11-26 11:53:46,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:46,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161472452] [2023-11-26 11:53:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:46,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161472452] [2023-11-26 11:53:47,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161472452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:47,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:47,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373080009] [2023-11-26 11:53:47,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:47,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:47,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2023-11-26 11:53:47,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-26 11:53:47,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:47,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2023-11-26 11:53:47,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:47,229 INFO L124 PetriNetUnfolderBase]: 88/193 cut-off events. [2023-11-26 11:53:47,229 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:53:47,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 193 events. 88/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 32 based on Foata normal form. 15/191 useless extension candidates. Maximal degree in co-relation 333. Up to 87 conditions per place. [2023-11-26 11:53:47,235 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 18 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-11-26 11:53:47,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 118 flow [2023-11-26 11:53:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-26 11:53:47,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2023-11-26 11:53:47,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-26 11:53:47,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-26 11:53:47,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-26 11:53:47,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2023-11-26 11:53:47,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,264 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 72 flow. Second operand 3 states and 72 transitions. [2023-11-26 11:53:47,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 118 flow [2023-11-26 11:53:47,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:47,271 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 64 flow [2023-11-26 11:53:47,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-26 11:53:47,277 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-26 11:53:47,277 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 64 flow [2023-11-26 11:53:47,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-26 11:53:47,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:47,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:53:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:53:47,279 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)] === [2023-11-26 11:53:47,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 6738, now seen corresponding path program 1 times [2023-11-26 11:53:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697816662] [2023-11-26 11:53:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697816662] [2023-11-26 11:53:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697816662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:47,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:47,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614057168] [2023-11-26 11:53:47,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:47,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:47,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-26 11:53:47,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-26 11:53:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-26 11:53:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:47,526 INFO L124 PetriNetUnfolderBase]: 70/165 cut-off events. [2023-11-26 11:53:47,527 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 11:53:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 165 events. 70/165 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 624 event pairs, 32 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 288. Up to 86 conditions per place. [2023-11-26 11:53:47,530 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-26 11:53:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 112 flow [2023-11-26 11:53:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-26 11:53:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2023-11-26 11:53:47,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-26 11:53:47,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,537 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 64 flow. Second operand 3 states and 71 transitions. [2023-11-26 11:53:47,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 112 flow [2023-11-26 11:53:47,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:47,539 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 62 flow [2023-11-26 11:53:47,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-26 11:53:47,541 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-26 11:53:47,541 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 62 flow [2023-11-26 11:53:47,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-26 11:53:47,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:47,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:53:47,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:53:47,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:47,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash 200868327, now seen corresponding path program 1 times [2023-11-26 11:53:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852353844] [2023-11-26 11:53:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:47,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852353844] [2023-11-26 11:53:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852353844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:47,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662396132] [2023-11-26 11:53:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-26 11:53:47,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:53:47,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:47,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-26 11:53:47,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:47,821 INFO L124 PetriNetUnfolderBase]: 70/164 cut-off events. [2023-11-26 11:53:47,821 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 11:53:47,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 164 events. 70/164 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 618 event pairs, 32 based on Foata normal form. 3/151 useless extension candidates. Maximal degree in co-relation 287. Up to 86 conditions per place. [2023-11-26 11:53:47,824 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-26 11:53:47,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 110 flow [2023-11-26 11:53:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-26 11:53:47,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2023-11-26 11:53:47,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-26 11:53:47,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-26 11:53:47,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:47,835 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 62 flow. Second operand 3 states and 71 transitions. [2023-11-26 11:53:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 110 flow [2023-11-26 11:53:47,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:47,837 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 60 flow [2023-11-26 11:53:47,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-26 11:53:47,838 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-26 11:53:47,838 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 60 flow [2023-11-26 11:53:47,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:53:47,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:47,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:53:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:53:47,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:47,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 200868326, now seen corresponding path program 1 times [2023-11-26 11:53:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:47,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862334248] [2023-11-26 11:53:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:47,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862334248] [2023-11-26 11:53:47,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862334248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:47,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:47,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459287023] [2023-11-26 11:53:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:47,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:47,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2023-11-26 11:53:47,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-26 11:53:47,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:47,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2023-11-26 11:53:47,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:48,116 INFO L124 PetriNetUnfolderBase]: 73/166 cut-off events. [2023-11-26 11:53:48,116 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 11:53:48,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 166 events. 73/166 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 600 event pairs, 34 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 295. Up to 92 conditions per place. [2023-11-26 11:53:48,119 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 18 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-26 11:53:48,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 110 flow [2023-11-26 11:53:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 11:53:48,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2023-11-26 11:53:48,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 11:53:48,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 11:53:48,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:48,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 11:53:48,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-26 11:53:48,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:48,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:53:48,132 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 60 flow. Second operand 3 states and 69 transitions. [2023-11-26 11:53:48,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 110 flow [2023-11-26 11:53:48,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:48,134 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-26 11:53:48,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-26 11:53:48,140 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2023-11-26 11:53:48,140 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-26 11:53:48,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-26 11:53:48,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:48,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:48,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:53:48,142 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)] === [2023-11-26 11:53:48,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:48,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1605654404, now seen corresponding path program 1 times [2023-11-26 11:53:48,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349553919] [2023-11-26 11:53:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:48,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:48,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349553919] [2023-11-26 11:53:48,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349553919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:48,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:48,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:48,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713819195] [2023-11-26 11:53:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:48,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:48,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-26 11:53:48,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-11-26 11:53:48,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-26 11:53:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:48,521 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-26 11:53:48,526 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 11:53:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 154 events. 70/154 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 550 event pairs, 32 based on Foata normal form. 9/148 useless extension candidates. Maximal degree in co-relation 277. Up to 86 conditions per place. [2023-11-26 11:53:48,531 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 11 selfloop transitions, 1 changer transitions 7/30 dead transitions. [2023-11-26 11:53:48,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 106 flow [2023-11-26 11:53:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2023-11-26 11:53:48,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2023-11-26 11:53:48,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2023-11-26 11:53:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2023-11-26 11:53:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:48,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2023-11-26 11:53:48,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-11-26 11:53:48,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:53:48,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:53:48,539 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 4 states and 88 transitions. [2023-11-26 11:53:48,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 106 flow [2023-11-26 11:53:48,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:48,543 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 52 flow [2023-11-26 11:53:48,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-26 11:53:48,546 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2023-11-26 11:53:48,547 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 52 flow [2023-11-26 11:53:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-11-26 11:53:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:48,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:53:48,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:48,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1605653309, now seen corresponding path program 1 times [2023-11-26 11:53:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:48,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71071363] [2023-11-26 11:53:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:48,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:48,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71071363] [2023-11-26 11:53:48,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71071363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:48,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:48,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:53:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277637620] [2023-11-26 11:53:48,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:53:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:53:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:48,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:48,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2023-11-26 11:53:48,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:48,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:48,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:48,950 INFO L124 PetriNetUnfolderBase]: 273/483 cut-off events. [2023-11-26 11:53:48,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:53:48,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 483 events. 273/483 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1906 event pairs, 45 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 917. Up to 181 conditions per place. [2023-11-26 11:53:48,956 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 25 selfloop transitions, 4 changer transitions 20/55 dead transitions. [2023-11-26 11:53:48,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 214 flow [2023-11-26 11:53:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:53:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:53:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2023-11-26 11:53:48,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2023-11-26 11:53:48,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 129 transitions. [2023-11-26 11:53:48,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 129 transitions. [2023-11-26 11:53:48,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:48,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 129 transitions. [2023-11-26 11:53:48,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 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) [2023-11-26 11:53:48,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:53:48,967 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:53:48,967 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 6 states and 129 transitions. [2023-11-26 11:53:48,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 214 flow [2023-11-26 11:53:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:48,970 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 78 flow [2023-11-26 11:53:48,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-26 11:53:48,974 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-11-26 11:53:48,974 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 78 flow [2023-11-26 11:53:48,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2023-11-26 11:53:48,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:48,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:48,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:53:48,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:48,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash -204762607, now seen corresponding path program 1 times [2023-11-26 11:53:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:48,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569504106] [2023-11-26 11:53:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:48,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:49,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569504106] [2023-11-26 11:53:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569504106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835916588] [2023-11-26 11:53:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:49,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:49,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:49,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2023-11-26 11:53:49,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:49,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:49,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:49,420 INFO L124 PetriNetUnfolderBase]: 382/711 cut-off events. [2023-11-26 11:53:49,420 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2023-11-26 11:53:49,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 711 events. 382/711 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3123 event pairs, 65 based on Foata normal form. 33/743 useless extension candidates. Maximal degree in co-relation 1598. Up to 246 conditions per place. [2023-11-26 11:53:49,428 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 9 changer transitions 20/81 dead transitions. [2023-11-26 11:53:49,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 81 transitions, 386 flow [2023-11-26 11:53:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:53:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2023-11-26 11:53:49,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-26 11:53:49,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 189 transitions. [2023-11-26 11:53:49,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 189 transitions. [2023-11-26 11:53:49,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:49,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 189 transitions. [2023-11-26 11:53:49,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 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) [2023-11-26 11:53:49,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 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) [2023-11-26 11:53:49,438 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 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) [2023-11-26 11:53:49,438 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 78 flow. Second operand 9 states and 189 transitions. [2023-11-26 11:53:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 81 transitions, 386 flow [2023-11-26 11:53:49,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 81 transitions, 370 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:49,447 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 163 flow [2023-11-26 11:53:49,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=163, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-11-26 11:53:49,449 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2023-11-26 11:53:49,449 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 163 flow [2023-11-26 11:53:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2023-11-26 11:53:49,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:49,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:53:49,451 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)] === [2023-11-26 11:53:49,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1564829837, now seen corresponding path program 2 times [2023-11-26 11:53:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495368590] [2023-11-26 11:53:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:49,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495368590] [2023-11-26 11:53:49,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495368590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646160602] [2023-11-26 11:53:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:49,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:49,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2023-11-26 11:53:49,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:49,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:49,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:49,887 INFO L124 PetriNetUnfolderBase]: 328/618 cut-off events. [2023-11-26 11:53:49,887 INFO L125 PetriNetUnfolderBase]: For 1001/1013 co-relation queries the response was YES. [2023-11-26 11:53:49,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 618 events. 328/618 cut-off events. For 1001/1013 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2626 event pairs, 65 based on Foata normal form. 57/674 useless extension candidates. Maximal degree in co-relation 1730. Up to 234 conditions per place. [2023-11-26 11:53:49,892 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 38 selfloop transitions, 9 changer transitions 28/81 dead transitions. [2023-11-26 11:53:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 503 flow [2023-11-26 11:53:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:53:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:53:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2023-11-26 11:53:49,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2023-11-26 11:53:49,895 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 167 transitions. [2023-11-26 11:53:49,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 167 transitions. [2023-11-26 11:53:49,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:49,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 167 transitions. [2023-11-26 11:53:49,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2023-11-26 11:53:49,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 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) [2023-11-26 11:53:49,902 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 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) [2023-11-26 11:53:49,902 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 163 flow. Second operand 8 states and 167 transitions. [2023-11-26 11:53:49,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 503 flow [2023-11-26 11:53:49,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 495 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:49,913 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 217 flow [2023-11-26 11:53:49,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=217, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-11-26 11:53:49,916 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-11-26 11:53:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 217 flow [2023-11-26 11:53:49,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2023-11-26 11:53:49,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:49,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:49,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:53:49,920 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)] === [2023-11-26 11:53:49,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1376396266, now seen corresponding path program 1 times [2023-11-26 11:53:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151888792] [2023-11-26 11:53:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:50,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151888792] [2023-11-26 11:53:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151888792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:50,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:50,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:53:50,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259811542] [2023-11-26 11:53:50,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:50,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:50,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 36 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:50,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:50,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:50,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:50,457 INFO L124 PetriNetUnfolderBase]: 337/630 cut-off events. [2023-11-26 11:53:50,458 INFO L125 PetriNetUnfolderBase]: For 1703/1715 co-relation queries the response was YES. [2023-11-26 11:53:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 630 events. 337/630 cut-off events. For 1703/1715 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2667 event pairs, 68 based on Foata normal form. 30/659 useless extension candidates. Maximal degree in co-relation 1933. Up to 237 conditions per place. [2023-11-26 11:53:50,465 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 16 changer transitions 24/92 dead transitions. [2023-11-26 11:53:50,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 614 flow [2023-11-26 11:53:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:53:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2023-11-26 11:53:50,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792207792207792 [2023-11-26 11:53:50,468 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 223 transitions. [2023-11-26 11:53:50,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 223 transitions. [2023-11-26 11:53:50,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:50,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 223 transitions. [2023-11-26 11:53:50,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.272727272727273) internal successors, (223), 11 states have internal predecessors, (223), 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) [2023-11-26 11:53:50,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:50,473 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:50,473 INFO L175 Difference]: Start difference. First operand has 53 places, 36 transitions, 217 flow. Second operand 11 states and 223 transitions. [2023-11-26 11:53:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 614 flow [2023-11-26 11:53:50,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 547 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-11-26 11:53:50,485 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 286 flow [2023-11-26 11:53:50,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=286, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-11-26 11:53:50,487 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-11-26 11:53:50,487 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 286 flow [2023-11-26 11:53:50,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:50,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:50,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:50,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:53:50,489 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)] === [2023-11-26 11:53:50,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash 312700604, now seen corresponding path program 2 times [2023-11-26 11:53:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:50,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262932964] [2023-11-26 11:53:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:50,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262932964] [2023-11-26 11:53:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262932964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:50,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:53:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143599001] [2023-11-26 11:53:50,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:50,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:50,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:50,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:50,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:50,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:50,981 INFO L124 PetriNetUnfolderBase]: 508/942 cut-off events. [2023-11-26 11:53:50,981 INFO L125 PetriNetUnfolderBase]: For 3228/3246 co-relation queries the response was YES. [2023-11-26 11:53:50,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3087 conditions, 942 events. 508/942 cut-off events. For 3228/3246 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4345 event pairs, 53 based on Foata normal form. 45/984 useless extension candidates. Maximal degree in co-relation 3063. Up to 253 conditions per place. [2023-11-26 11:53:50,992 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 57 selfloop transitions, 20 changer transitions 23/106 dead transitions. [2023-11-26 11:53:50,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 106 transitions, 778 flow [2023-11-26 11:53:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:53:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2023-11-26 11:53:50,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5948051948051948 [2023-11-26 11:53:50,995 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 229 transitions. [2023-11-26 11:53:50,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 229 transitions. [2023-11-26 11:53:50,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:50,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 229 transitions. [2023-11-26 11:53:50,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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) [2023-11-26 11:53:50,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:50,999 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:51,000 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 286 flow. Second operand 11 states and 229 transitions. [2023-11-26 11:53:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 106 transitions, 778 flow [2023-11-26 11:53:51,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 106 transitions, 712 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-26 11:53:51,017 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 383 flow [2023-11-26 11:53:51,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-11-26 11:53:51,019 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-26 11:53:51,020 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 383 flow [2023-11-26 11:53:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:51,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:51,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:51,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:53:51,022 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)] === [2023-11-26 11:53:51,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1152289066, now seen corresponding path program 3 times [2023-11-26 11:53:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:51,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521357673] [2023-11-26 11:53:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:51,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521357673] [2023-11-26 11:53:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521357673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:53:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492914850] [2023-11-26 11:53:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:51,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:51,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 383 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:51,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:51,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:51,535 INFO L124 PetriNetUnfolderBase]: 481/897 cut-off events. [2023-11-26 11:53:51,535 INFO L125 PetriNetUnfolderBase]: For 5148/5166 co-relation queries the response was YES. [2023-11-26 11:53:51,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 897 events. 481/897 cut-off events. For 5148/5166 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4091 event pairs, 59 based on Foata normal form. 63/957 useless extension candidates. Maximal degree in co-relation 3369. Up to 154 conditions per place. [2023-11-26 11:53:51,546 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 45 selfloop transitions, 25 changer transitions 33/109 dead transitions. [2023-11-26 11:53:51,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 971 flow [2023-11-26 11:53:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:53:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2023-11-26 11:53:51,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.587012987012987 [2023-11-26 11:53:51,548 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 226 transitions. [2023-11-26 11:53:51,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 226 transitions. [2023-11-26 11:53:51,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:51,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 226 transitions. [2023-11-26 11:53:51,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.545454545454547) internal successors, (226), 11 states have internal predecessors, (226), 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) [2023-11-26 11:53:51,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:51,552 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:51,552 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 383 flow. Second operand 11 states and 226 transitions. [2023-11-26 11:53:51,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 971 flow [2023-11-26 11:53:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 109 transitions, 900 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-26 11:53:51,593 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 482 flow [2023-11-26 11:53:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-11-26 11:53:51,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2023-11-26 11:53:51,594 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 482 flow [2023-11-26 11:53:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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) [2023-11-26 11:53:51,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:53:51,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash -112936374, now seen corresponding path program 1 times [2023-11-26 11:53:51,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792842215] [2023-11-26 11:53:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792842215] [2023-11-26 11:53:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792842215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135958862] [2023-11-26 11:53:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:51,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:51,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:51,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:51,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:52,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135958862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:52,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:52,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-26 11:53:52,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961607802] [2023-11-26 11:53:52,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:53:52,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:53:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:53:52,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:52,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 482 flow. Second operand has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 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) [2023-11-26 11:53:52,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:52,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:52,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:52,868 INFO L124 PetriNetUnfolderBase]: 589/1107 cut-off events. [2023-11-26 11:53:52,868 INFO L125 PetriNetUnfolderBase]: For 10463/10481 co-relation queries the response was YES. [2023-11-26 11:53:52,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4749 conditions, 1107 events. 589/1107 cut-off events. For 10463/10481 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4796 event pairs, 149 based on Foata normal form. 81/1187 useless extension candidates. Maximal degree in co-relation 4716. Up to 522 conditions per place. [2023-11-26 11:53:52,880 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 67 selfloop transitions, 17 changer transitions 67/157 dead transitions. [2023-11-26 11:53:52,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 157 transitions, 1554 flow [2023-11-26 11:53:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:53:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:53:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 383 transitions. [2023-11-26 11:53:52,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5759398496240602 [2023-11-26 11:53:52,884 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 383 transitions. [2023-11-26 11:53:52,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 383 transitions. [2023-11-26 11:53:52,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:52,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 383 transitions. [2023-11-26 11:53:52,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 20.157894736842106) internal successors, (383), 19 states have internal predecessors, (383), 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) [2023-11-26 11:53:52,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 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) [2023-11-26 11:53:52,889 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 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) [2023-11-26 11:53:52,890 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 482 flow. Second operand 19 states and 383 transitions. [2023-11-26 11:53:52,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 157 transitions, 1554 flow [2023-11-26 11:53:52,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 157 transitions, 1455 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-26 11:53:52,918 INFO L231 Difference]: Finished difference. Result has 97 places, 57 transitions, 611 flow [2023-11-26 11:53:52,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=611, PETRI_PLACES=97, PETRI_TRANSITIONS=57} [2023-11-26 11:53:52,919 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2023-11-26 11:53:52,919 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 57 transitions, 611 flow [2023-11-26 11:53:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 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) [2023-11-26 11:53:52,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:52,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:52,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:53:53,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:53,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash -849015018, now seen corresponding path program 2 times [2023-11-26 11:53:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:53,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258676049] [2023-11-26 11:53:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258676049] [2023-11-26 11:53:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258676049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818012351] [2023-11-26 11:53:53,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:53:53,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:53,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:53,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:53,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:53:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:53,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:53,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:53,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818012351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:53,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-26 11:53:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281924880] [2023-11-26 11:53:53,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:53:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:53:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:53:53,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:53,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 57 transitions, 611 flow. Second operand has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 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) [2023-11-26 11:53:53,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:53,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:53,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:54,542 INFO L124 PetriNetUnfolderBase]: 877/1635 cut-off events. [2023-11-26 11:53:54,542 INFO L125 PetriNetUnfolderBase]: For 36551/36569 co-relation queries the response was YES. [2023-11-26 11:53:54,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9243 conditions, 1635 events. 877/1635 cut-off events. For 36551/36569 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7950 event pairs, 68 based on Foata normal form. 90/1724 useless extension candidates. Maximal degree in co-relation 9200. Up to 312 conditions per place. [2023-11-26 11:53:54,569 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 88 selfloop transitions, 47 changer transitions 80/221 dead transitions. [2023-11-26 11:53:54,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 221 transitions, 2813 flow [2023-11-26 11:53:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:53:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 11:53:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 550 transitions. [2023-11-26 11:53:54,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2023-11-26 11:53:54,574 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 550 transitions. [2023-11-26 11:53:54,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 550 transitions. [2023-11-26 11:53:54,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:54,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 550 transitions. [2023-11-26 11:53:54,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 20.37037037037037) internal successors, (550), 27 states have internal predecessors, (550), 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) [2023-11-26 11:53:54,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 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) [2023-11-26 11:53:54,582 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 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) [2023-11-26 11:53:54,582 INFO L175 Difference]: Start difference. First operand has 97 places, 57 transitions, 611 flow. Second operand 27 states and 550 transitions. [2023-11-26 11:53:54,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 221 transitions, 2813 flow [2023-11-26 11:53:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 221 transitions, 2269 flow, removed 261 selfloop flow, removed 12 redundant places. [2023-11-26 11:53:54,646 INFO L231 Difference]: Finished difference. Result has 123 places, 73 transitions, 1014 flow [2023-11-26 11:53:54,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1014, PETRI_PLACES=123, PETRI_TRANSITIONS=73} [2023-11-26 11:53:54,647 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 87 predicate places. [2023-11-26 11:53:54,648 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 73 transitions, 1014 flow [2023-11-26 11:53:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 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) [2023-11-26 11:53:54,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:54,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:54,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:54,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:53:54,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:54,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash -842807811, now seen corresponding path program 1 times [2023-11-26 11:53:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:54,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658258076] [2023-11-26 11:53:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:54,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658258076] [2023-11-26 11:53:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658258076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161560575] [2023-11-26 11:53:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:55,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:55,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:55,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:55,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:55,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161560575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:55,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:55,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-26 11:53:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450358343] [2023-11-26 11:53:55,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:55,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:53:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:53:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:53:55,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:55,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 73 transitions, 1014 flow. Second operand has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 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) [2023-11-26 11:53:55,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:55,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:55,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:56,516 INFO L124 PetriNetUnfolderBase]: 1111/2104 cut-off events. [2023-11-26 11:53:56,516 INFO L125 PetriNetUnfolderBase]: For 86450/86456 co-relation queries the response was YES. [2023-11-26 11:53:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14615 conditions, 2104 events. 1111/2104 cut-off events. For 86450/86456 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11015 event pairs, 153 based on Foata normal form. 69/2170 useless extension candidates. Maximal degree in co-relation 14560. Up to 490 conditions per place. [2023-11-26 11:53:56,556 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 99 selfloop transitions, 51 changer transitions 67/223 dead transitions. [2023-11-26 11:53:56,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 223 transitions, 3626 flow [2023-11-26 11:53:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:53:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 11:53:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 509 transitions. [2023-11-26 11:53:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817142857142857 [2023-11-26 11:53:56,560 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 509 transitions. [2023-11-26 11:53:56,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 509 transitions. [2023-11-26 11:53:56,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:56,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 509 transitions. [2023-11-26 11:53:56,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 20.36) internal successors, (509), 25 states have internal predecessors, (509), 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) [2023-11-26 11:53:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 35.0) internal successors, (910), 26 states have internal predecessors, (910), 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) [2023-11-26 11:53:56,567 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 35.0) internal successors, (910), 26 states have internal predecessors, (910), 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) [2023-11-26 11:53:56,567 INFO L175 Difference]: Start difference. First operand has 123 places, 73 transitions, 1014 flow. Second operand 25 states and 509 transitions. [2023-11-26 11:53:56,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 223 transitions, 3626 flow [2023-11-26 11:53:56,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 223 transitions, 3046 flow, removed 274 selfloop flow, removed 15 redundant places. [2023-11-26 11:53:56,731 INFO L231 Difference]: Finished difference. Result has 139 places, 84 transitions, 1300 flow [2023-11-26 11:53:56,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1300, PETRI_PLACES=139, PETRI_TRANSITIONS=84} [2023-11-26 11:53:56,732 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 103 predicate places. [2023-11-26 11:53:56,733 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 84 transitions, 1300 flow [2023-11-26 11:53:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 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) [2023-11-26 11:53:56,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:56,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:56,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:56,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:53:56,939 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:56,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash 329646449, now seen corresponding path program 2 times [2023-11-26 11:53:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:56,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265764858] [2023-11-26 11:53:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:56,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265764858] [2023-11-26 11:53:57,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265764858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:57,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613910673] [2023-11-26 11:53:57,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:53:57,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:57,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:57,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:57,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:53:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:57,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:57,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:57,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:57,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613910673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:57,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:57,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-26 11:53:57,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010104334] [2023-11-26 11:53:57,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:53:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:57,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:53:57,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:57,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:57,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 84 transitions, 1300 flow. Second operand has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 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) [2023-11-26 11:53:57,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:57,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:57,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:58,597 INFO L124 PetriNetUnfolderBase]: 1192/2279 cut-off events. [2023-11-26 11:53:58,597 INFO L125 PetriNetUnfolderBase]: For 130340/130346 co-relation queries the response was YES. [2023-11-26 11:53:58,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16888 conditions, 2279 events. 1192/2279 cut-off events. For 130340/130346 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12000 event pairs, 38 based on Foata normal form. 132/2410 useless extension candidates. Maximal degree in co-relation 16826. Up to 480 conditions per place. [2023-11-26 11:53:58,651 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 89 selfloop transitions, 76 changer transitions 93/264 dead transitions. [2023-11-26 11:53:58,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 264 transitions, 4886 flow [2023-11-26 11:53:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:53:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 11:53:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 569 transitions. [2023-11-26 11:53:58,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806122448979592 [2023-11-26 11:53:58,653 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 569 transitions. [2023-11-26 11:53:58,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 569 transitions. [2023-11-26 11:53:58,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:58,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 569 transitions. [2023-11-26 11:53:58,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 20.321428571428573) internal successors, (569), 28 states have internal predecessors, (569), 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) [2023-11-26 11:53:58,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 35.0) internal successors, (1015), 29 states have internal predecessors, (1015), 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) [2023-11-26 11:53:58,659 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 35.0) internal successors, (1015), 29 states have internal predecessors, (1015), 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) [2023-11-26 11:53:58,659 INFO L175 Difference]: Start difference. First operand has 139 places, 84 transitions, 1300 flow. Second operand 28 states and 569 transitions. [2023-11-26 11:53:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 264 transitions, 4886 flow [2023-11-26 11:53:58,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 264 transitions, 4147 flow, removed 336 selfloop flow, removed 18 redundant places. [2023-11-26 11:53:58,940 INFO L231 Difference]: Finished difference. Result has 158 places, 103 transitions, 1861 flow [2023-11-26 11:53:58,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1861, PETRI_PLACES=158, PETRI_TRANSITIONS=103} [2023-11-26 11:53:58,942 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 122 predicate places. [2023-11-26 11:53:58,942 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 103 transitions, 1861 flow [2023-11-26 11:53:58,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 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) [2023-11-26 11:53:58,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:58,942 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:58,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:53:59,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:53:59,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1325997183, now seen corresponding path program 3 times [2023-11-26 11:53:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:59,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845977972] [2023-11-26 11:53:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:59,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845977972] [2023-11-26 11:53:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845977972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535707316] [2023-11-26 11:53:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:53:59,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:59,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:59,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:59,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:59,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 11:53:59,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:59,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:59,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:59,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535707316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:59,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:59,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-26 11:53:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032887440] [2023-11-26 11:53:59,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:59,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:53:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:53:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:53:59,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:53:59,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 103 transitions, 1861 flow. Second operand has 23 states, 23 states have (on average 15.08695652173913) internal successors, (347), 23 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:59,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:59,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:53:59,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:02,137 INFO L124 PetriNetUnfolderBase]: 1678/3104 cut-off events. [2023-11-26 11:54:02,137 INFO L125 PetriNetUnfolderBase]: For 240019/240025 co-relation queries the response was YES. [2023-11-26 11:54:02,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26438 conditions, 3104 events. 1678/3104 cut-off events. For 240019/240025 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 15413 event pairs, 40 based on Foata normal form. 96/3199 useless extension candidates. Maximal degree in co-relation 26368. Up to 666 conditions per place. [2023-11-26 11:54:02,209 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 142 selfloop transitions, 110 changer transitions 135/393 dead transitions. [2023-11-26 11:54:02,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 393 transitions, 8141 flow [2023-11-26 11:54:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 11:54:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-26 11:54:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 933 transitions. [2023-11-26 11:54:02,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795031055900621 [2023-11-26 11:54:02,213 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 933 transitions. [2023-11-26 11:54:02,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 933 transitions. [2023-11-26 11:54:02,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:02,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 933 transitions. [2023-11-26 11:54:02,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 20.282608695652176) internal successors, (933), 46 states have internal predecessors, (933), 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) [2023-11-26 11:54:02,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 35.0) internal successors, (1645), 47 states have internal predecessors, (1645), 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) [2023-11-26 11:54:02,225 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 35.0) internal successors, (1645), 47 states have internal predecessors, (1645), 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) [2023-11-26 11:54:02,226 INFO L175 Difference]: Start difference. First operand has 158 places, 103 transitions, 1861 flow. Second operand 46 states and 933 transitions. [2023-11-26 11:54:02,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 393 transitions, 8141 flow [2023-11-26 11:54:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 393 transitions, 6945 flow, removed 568 selfloop flow, removed 19 redundant places. [2023-11-26 11:54:02,507 INFO L231 Difference]: Finished difference. Result has 205 places, 137 transitions, 2973 flow [2023-11-26 11:54:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2973, PETRI_PLACES=205, PETRI_TRANSITIONS=137} [2023-11-26 11:54:02,508 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 169 predicate places. [2023-11-26 11:54:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 137 transitions, 2973 flow [2023-11-26 11:54:02,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 15.08695652173913) internal successors, (347), 23 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:02,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:02,509 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:02,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:02,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:54:02,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:54:02,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1130206358, now seen corresponding path program 4 times [2023-11-26 11:54:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170673341] [2023-11-26 11:54:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170673341] [2023-11-26 11:54:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170673341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121621671] [2023-11-26 11:54:03,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:54:03,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:03,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:03,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:54:03,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:54:03,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:03,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:54:03,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:03,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:03,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121621671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:03,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:03,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2023-11-26 11:54:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522811997] [2023-11-26 11:54:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:54:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:54:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:54:03,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:54:03,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 137 transitions, 2973 flow. Second operand has 27 states, 27 states have (on average 15.222222222222221) internal successors, (411), 27 states have internal predecessors, (411), 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) [2023-11-26 11:54:03,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:03,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:54:03,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:06,417 INFO L124 PetriNetUnfolderBase]: 1930/3724 cut-off events. [2023-11-26 11:54:06,417 INFO L125 PetriNetUnfolderBase]: For 455211/455217 co-relation queries the response was YES. [2023-11-26 11:54:06,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36526 conditions, 3724 events. 1930/3724 cut-off events. For 455211/455217 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 19744 event pairs, 409 based on Foata normal form. 87/3808 useless extension candidates. Maximal degree in co-relation 36438. Up to 1447 conditions per place. [2023-11-26 11:54:06,506 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 161 selfloop transitions, 87 changer transitions 115/369 dead transitions. [2023-11-26 11:54:06,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 369 transitions, 9777 flow [2023-11-26 11:54:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 11:54:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-26 11:54:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 754 transitions. [2023-11-26 11:54:06,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669172932330827 [2023-11-26 11:54:06,510 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 754 transitions. [2023-11-26 11:54:06,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 754 transitions. [2023-11-26 11:54:06,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:06,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 754 transitions. [2023-11-26 11:54:06,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 19.842105263157894) internal successors, (754), 38 states have internal predecessors, (754), 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) [2023-11-26 11:54:06,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 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) [2023-11-26 11:54:06,518 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 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) [2023-11-26 11:54:06,519 INFO L175 Difference]: Start difference. First operand has 205 places, 137 transitions, 2973 flow. Second operand 38 states and 754 transitions. [2023-11-26 11:54:06,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 369 transitions, 9777 flow [2023-11-26 11:54:07,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 369 transitions, 7008 flow, removed 1345 selfloop flow, removed 29 redundant places. [2023-11-26 11:54:07,582 INFO L231 Difference]: Finished difference. Result has 222 places, 167 transitions, 3210 flow [2023-11-26 11:54:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3210, PETRI_PLACES=222, PETRI_TRANSITIONS=167} [2023-11-26 11:54:07,583 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 186 predicate places. [2023-11-26 11:54:07,583 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 167 transitions, 3210 flow [2023-11-26 11:54:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 15.222222222222221) internal successors, (411), 27 states have internal predecessors, (411), 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) [2023-11-26 11:54:07,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:07,584 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:07,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:07,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:54:07,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:54:07,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1868666724, now seen corresponding path program 5 times [2023-11-26 11:54:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170815068] [2023-11-26 11:54:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:08,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:08,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170815068] [2023-11-26 11:54:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170815068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717330503] [2023-11-26 11:54:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:54:08,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:08,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:08,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:08,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:54:08,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-26 11:54:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:08,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:54:08,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:08,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717330503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:09,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-26 11:54:09,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381123989] [2023-11-26 11:54:09,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 11:54:09,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 11:54:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:54:09,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:54:09,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 167 transitions, 3210 flow. Second operand has 31 states, 31 states have (on average 15.225806451612904) internal successors, (472), 31 states have internal predecessors, (472), 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) [2023-11-26 11:54:09,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:09,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:54:09,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:12,278 INFO L124 PetriNetUnfolderBase]: 2443/4887 cut-off events. [2023-11-26 11:54:12,279 INFO L125 PetriNetUnfolderBase]: For 533205/533211 co-relation queries the response was YES. [2023-11-26 11:54:12,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43703 conditions, 4887 events. 2443/4887 cut-off events. For 533205/533211 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28197 event pairs, 194 based on Foata normal form. 87/4973 useless extension candidates. Maximal degree in co-relation 43614. Up to 1158 conditions per place. [2023-11-26 11:54:12,377 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 156 selfloop transitions, 173 changer transitions 129/464 dead transitions. [2023-11-26 11:54:12,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 464 transitions, 10631 flow [2023-11-26 11:54:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-26 11:54:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-26 11:54:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 898 transitions. [2023-11-26 11:54:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701587301587302 [2023-11-26 11:54:12,381 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 898 transitions. [2023-11-26 11:54:12,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 898 transitions. [2023-11-26 11:54:12,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:12,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 898 transitions. [2023-11-26 11:54:12,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 19.955555555555556) internal successors, (898), 45 states have internal predecessors, (898), 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) [2023-11-26 11:54:12,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 35.0) internal successors, (1610), 46 states have internal predecessors, (1610), 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) [2023-11-26 11:54:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 35.0) internal successors, (1610), 46 states have internal predecessors, (1610), 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) [2023-11-26 11:54:12,390 INFO L175 Difference]: Start difference. First operand has 222 places, 167 transitions, 3210 flow. Second operand 45 states and 898 transitions. [2023-11-26 11:54:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 464 transitions, 10631 flow [2023-11-26 11:54:13,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 464 transitions, 9490 flow, removed 539 selfloop flow, removed 22 redundant places. [2023-11-26 11:54:13,915 INFO L231 Difference]: Finished difference. Result has 255 places, 224 transitions, 4846 flow [2023-11-26 11:54:13,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4846, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2023-11-26 11:54:13,916 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 219 predicate places. [2023-11-26 11:54:13,916 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 4846 flow [2023-11-26 11:54:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 15.225806451612904) internal successors, (472), 31 states have internal predecessors, (472), 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) [2023-11-26 11:54:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:13,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:54:14,123 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:54:14,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1828967834, now seen corresponding path program 6 times [2023-11-26 11:54:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249682717] [2023-11-26 11:54:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:14,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:14,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249682717] [2023-11-26 11:54:14,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249682717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:14,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997720900] [2023-11-26 11:54:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:54:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:14,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:14,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:54:14,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-26 11:54:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:14,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:54:14,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:14,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997720900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:15,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:15,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-26 11:54:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66682532] [2023-11-26 11:54:15,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 11:54:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 11:54:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:54:15,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:54:15,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 4846 flow. Second operand has 31 states, 31 states have (on average 15.129032258064516) internal successors, (469), 31 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:15,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:15,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:54:15,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:18,690 INFO L124 PetriNetUnfolderBase]: 3082/6098 cut-off events. [2023-11-26 11:54:18,690 INFO L125 PetriNetUnfolderBase]: For 885526/885532 co-relation queries the response was YES. [2023-11-26 11:54:18,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61681 conditions, 6098 events. 3082/6098 cut-off events. For 885526/885532 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35624 event pairs, 47 based on Foata normal form. 87/6182 useless extension candidates. Maximal degree in co-relation 61582. Up to 1455 conditions per place. [2023-11-26 11:54:18,800 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 184 selfloop transitions, 226 changer transitions 121/537 dead transitions. [2023-11-26 11:54:18,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 537 transitions, 13870 flow [2023-11-26 11:54:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 11:54:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-26 11:54:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 994 transitions. [2023-11-26 11:54:18,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795918367346938 [2023-11-26 11:54:18,804 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 994 transitions. [2023-11-26 11:54:18,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 994 transitions. [2023-11-26 11:54:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:18,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 994 transitions. [2023-11-26 11:54:18,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 20.285714285714285) internal successors, (994), 49 states have internal predecessors, (994), 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) [2023-11-26 11:54:18,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 35.0) internal successors, (1750), 50 states have internal predecessors, (1750), 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) [2023-11-26 11:54:18,813 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 35.0) internal successors, (1750), 50 states have internal predecessors, (1750), 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) [2023-11-26 11:54:18,813 INFO L175 Difference]: Start difference. First operand has 255 places, 224 transitions, 4846 flow. Second operand 49 states and 994 transitions. [2023-11-26 11:54:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 537 transitions, 13870 flow [2023-11-26 11:54:20,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 537 transitions, 12043 flow, removed 861 selfloop flow, removed 24 redundant places. [2023-11-26 11:54:20,830 INFO L231 Difference]: Finished difference. Result has 292 places, 260 transitions, 6074 flow [2023-11-26 11:54:20,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6074, PETRI_PLACES=292, PETRI_TRANSITIONS=260} [2023-11-26 11:54:20,832 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 256 predicate places. [2023-11-26 11:54:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 260 transitions, 6074 flow [2023-11-26 11:54:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 15.129032258064516) internal successors, (469), 31 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:20,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:20,833 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:20,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:21,038 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:54:21,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2050584553, now seen corresponding path program 7 times [2023-11-26 11:54:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:21,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529837133] [2023-11-26 11:54:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:21,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:21,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529837133] [2023-11-26 11:54:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529837133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575837923] [2023-11-26 11:54:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:54:21,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:21,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:21,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:54:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:21,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:54:21,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:21,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575837923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:22,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2023-11-26 11:54:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212613988] [2023-11-26 11:54:22,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:54:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:54:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:54:22,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:54:22,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 260 transitions, 6074 flow. Second operand has 27 states, 27 states have (on average 15.185185185185185) internal successors, (410), 27 states have internal predecessors, (410), 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) [2023-11-26 11:54:22,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:22,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:54:22,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:25,881 INFO L124 PetriNetUnfolderBase]: 3091/6139 cut-off events. [2023-11-26 11:54:25,881 INFO L125 PetriNetUnfolderBase]: For 1103886/1103892 co-relation queries the response was YES. [2023-11-26 11:54:25,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65639 conditions, 6139 events. 3091/6139 cut-off events. For 1103886/1103892 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 36040 event pairs, 38 based on Foata normal form. 123/6261 useless extension candidates. Maximal degree in co-relation 65526. Up to 1446 conditions per place. [2023-11-26 11:54:25,995 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 176 selfloop transitions, 243 changer transitions 139/564 dead transitions. [2023-11-26 11:54:25,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 564 transitions, 15258 flow [2023-11-26 11:54:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-26 11:54:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-26 11:54:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1049 transitions. [2023-11-26 11:54:26,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763736263736263 [2023-11-26 11:54:26,009 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 1049 transitions. [2023-11-26 11:54:26,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 1049 transitions. [2023-11-26 11:54:26,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:26,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 1049 transitions. [2023-11-26 11:54:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 20.173076923076923) internal successors, (1049), 52 states have internal predecessors, (1049), 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) [2023-11-26 11:54:26,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 35.0) internal successors, (1855), 53 states have internal predecessors, (1855), 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) [2023-11-26 11:54:26,023 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 35.0) internal successors, (1855), 53 states have internal predecessors, (1855), 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) [2023-11-26 11:54:26,024 INFO L175 Difference]: Start difference. First operand has 292 places, 260 transitions, 6074 flow. Second operand 52 states and 1049 transitions. [2023-11-26 11:54:26,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 564 transitions, 15258 flow [2023-11-26 11:54:28,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 564 transitions, 13300 flow, removed 888 selfloop flow, removed 28 redundant places. [2023-11-26 11:54:29,005 INFO L231 Difference]: Finished difference. Result has 323 places, 273 transitions, 6571 flow [2023-11-26 11:54:29,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6571, PETRI_PLACES=323, PETRI_TRANSITIONS=273} [2023-11-26 11:54:29,006 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 287 predicate places. [2023-11-26 11:54:29,006 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 273 transitions, 6571 flow [2023-11-26 11:54:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 15.185185185185185) internal successors, (410), 27 states have internal predecessors, (410), 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) [2023-11-26 11:54:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:29,006 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:29,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 11:54:29,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:29,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-26 11:54:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:29,213 INFO L85 PathProgramCache]: Analyzing trace with hash 783635539, now seen corresponding path program 8 times [2023-11-26 11:54:29,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:29,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778930676] [2023-11-26 11:54:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:29,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778930676] [2023-11-26 11:54:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778930676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673951174] [2023-11-26 11:54:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:54:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:29,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:29,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f67cd9-2bb5-4cda-b32c-061db66d1b11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:54:29,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:54:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:29,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:54:29,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:30,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:30,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673951174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:30,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:30,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 46 [2023-11-26 11:54:30,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305943601] [2023-11-26 11:54:30,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:30,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-26 11:54:30,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-26 11:54:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1682, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 11:54:30,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2023-11-26 11:54:30,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 273 transitions, 6571 flow. Second operand has 47 states, 47 states have (on average 15.042553191489361) internal successors, (707), 47 states have internal predecessors, (707), 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) [2023-11-26 11:54:30,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:30,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2023-11-26 11:54:30,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand