./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:52,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:52,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:52,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:52,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:52,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:52,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:52,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:52,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:52,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:52,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:52,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:52,401 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:52,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:52,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:52,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:52,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:52,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:52,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:52,405 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:52,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:52,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:52,428 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:52,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:52,429 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:52,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:52,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:52,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:52,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:52,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:52,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:52,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:52,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:52,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:52,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:52,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:52,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:52,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:52,435 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:52,435 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_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2023-11-19 07:45:52,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:52,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:52,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:52,815 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:52,815 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:52,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-19 07:45:56,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:56,393 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:56,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-19 07:45:56,417 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/data/303623317/e712a23ae8164e4cb348d703e02a0d1f/FLAG7b5502e18 [2023-11-19 07:45:56,432 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/data/303623317/e712a23ae8164e4cb348d703e02a0d1f [2023-11-19 07:45:56,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:56,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:56,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:56,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:56,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:56,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:56" (1/1) ... [2023-11-19 07:45:56,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d63f70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:56, skipping insertion in model container [2023-11-19 07:45:56,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:56" (1/1) ... [2023-11-19 07:45:56,507 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:56,973 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2023-11-19 07:45:56,988 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2023-11-19 07:45:56,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:57,012 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:57,073 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2023-11-19 07:45:57,086 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2023-11-19 07:45:57,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:57,141 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:45:57,142 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:45:57,150 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:57,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57 WrapperNode [2023-11-19 07:45:57,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:57,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:57,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:57,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:57,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,240 INFO L138 Inliner]: procedures = 174, calls = 47, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 162 [2023-11-19 07:45:57,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:57,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:57,242 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:57,242 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:57,253 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,288 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:57,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:57,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:57,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:57,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (1/1) ... [2023-11-19 07:45:57,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:57,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:45:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:45:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:45:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:45:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:45:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:57,466 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:45:57,599 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:57,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:57,873 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:58,208 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:58,208 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:45:58,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:58 BoogieIcfgContainer [2023-11-19 07:45:58,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:58,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:58,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:58,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:58,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:56" (1/3) ... [2023-11-19 07:45:58,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9e0369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:58, skipping insertion in model container [2023-11-19 07:45:58,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:57" (2/3) ... [2023-11-19 07:45:58,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9e0369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:58, skipping insertion in model container [2023-11-19 07:45:58,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:58" (3/3) ... [2023-11-19 07:45:58,224 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-11-19 07:45:58,232 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:45:58,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:58,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:45:58,242 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:45:58,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:45:58,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,420 INFO L124 PetriNetUnfolderBase]: 11/109 cut-off events. [2023-11-19 07:45:58,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:58,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 109 events. 11/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 224 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-19 07:45:58,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,438 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:58,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 98 transitions, 200 flow [2023-11-19 07:45:58,485 INFO L124 PetriNetUnfolderBase]: 11/109 cut-off events. [2023-11-19 07:45:58,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:58,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 109 events. 11/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 224 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-19 07:45:58,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-11-19 07:46:02,051 INFO L134 LiptonReduction]: Checked pairs total: 2542 [2023-11-19 07:46:02,051 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-11-19 07:46:02,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:02,072 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@70313279, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:02,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:46:02,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:46:02,078 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-11-19 07:46:02,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:46:02,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:02,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:46:02,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:46:02,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 724743210, now seen corresponding path program 1 times [2023-11-19 07:46:02,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:02,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047668592] [2023-11-19 07:46:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:46:02,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:46:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:46:02,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:46:02,297 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:46:02,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:46:02,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:46:02,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:46:02,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:46:02,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:46:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:46:02,305 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 07:46:02,315 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:46:02,315 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:46:02,418 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:46:02,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,523 INFO L124 PetriNetUnfolderBase]: 21/188 cut-off events. [2023-11-19 07:46:02,524 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:46:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 188 events. 21/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 600 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-19 07:46:02,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,534 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:46:02,535 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,535 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 164 transitions, 338 flow [2023-11-19 07:46:02,590 INFO L124 PetriNetUnfolderBase]: 21/188 cut-off events. [2023-11-19 07:46:02,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:46:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 188 events. 21/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 600 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-19 07:46:02,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 12220 [2023-11-19 07:46:07,352 INFO L134 LiptonReduction]: Checked pairs total: 16895 [2023-11-19 07:46:07,353 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-11-19 07:46:07,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:07,359 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@70313279, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:07,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:46:07,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:46:07,366 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-19 07:46:07,366 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:46:07,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:07,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:46:07,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:46:07,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1148425944, now seen corresponding path program 1 times [2023-11-19 07:46:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897407181] [2023-11-19 07:46:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897407181] [2023-11-19 07:46:07,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897407181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:07,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:07,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:46:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751059831] [2023-11-19 07:46:07,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:07,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:46:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:46:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:46:07,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 309 [2023-11-19 07:46:07,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 52 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:07,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:07,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 309 [2023-11-19 07:46:07,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:08,024 INFO L124 PetriNetUnfolderBase]: 1065/1643 cut-off events. [2023-11-19 07:46:08,025 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-19 07:46:08,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3308 conditions, 1643 events. 1065/1643 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8595 event pairs, 735 based on Foata normal form. 0/1157 useless extension candidates. Maximal degree in co-relation 770. Up to 1612 conditions per place. [2023-11-19 07:46:08,043 INFO L140 encePairwiseOnDemand]: 304/309 looper letters, 44 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-11-19 07:46:08,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 192 flow [2023-11-19 07:46:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:46:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:46:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 321 transitions. [2023-11-19 07:46:08,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194174757281553 [2023-11-19 07:46:08,066 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 321 transitions. [2023-11-19 07:46:08,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 321 transitions. [2023-11-19 07:46:08,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:08,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 321 transitions. [2023-11-19 07:46:08,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:08,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:08,087 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:08,089 INFO L175 Difference]: Start difference. First operand has 43 places, 52 transitions, 114 flow. Second operand 2 states and 321 transitions. [2023-11-19 07:46:08,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 192 flow [2023-11-19 07:46:08,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:46:08,098 INFO L231 Difference]: Finished difference. Result has 43 places, 47 transitions, 104 flow [2023-11-19 07:46:08,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=43, PETRI_TRANSITIONS=47} [2023-11-19 07:46:08,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-11-19 07:46:08,107 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 47 transitions, 104 flow [2023-11-19 07:46:08,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:08,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:08,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:46:08,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:46:08,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 173148574, now seen corresponding path program 1 times [2023-11-19 07:46:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199917676] [2023-11-19 07:46:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:08,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199917676] [2023-11-19 07:46:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199917676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:08,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:46:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004457671] [2023-11-19 07:46:08,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:08,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:46:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:46:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:46:08,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 309 [2023-11-19 07:46:08,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 47 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 309 [2023-11-19 07:46:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:09,406 INFO L124 PetriNetUnfolderBase]: 875/1381 cut-off events. [2023-11-19 07:46:09,407 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-19 07:46:09,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 1381 events. 875/1381 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7499 event pairs, 289 based on Foata normal form. 0/1015 useless extension candidates. Maximal degree in co-relation 2786. Up to 1181 conditions per place. [2023-11-19 07:46:09,426 INFO L140 encePairwiseOnDemand]: 302/309 looper letters, 55 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-19 07:46:09,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 253 flow [2023-11-19 07:46:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:46:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-11-19 07:46:09,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45846817691477887 [2023-11-19 07:46:09,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-11-19 07:46:09,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-11-19 07:46:09,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:09,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-11-19 07:46:09,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:09,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:09,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:09,439 INFO L175 Difference]: Start difference. First operand has 43 places, 47 transitions, 104 flow. Second operand 3 states and 425 transitions. [2023-11-19 07:46:09,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 253 flow [2023-11-19 07:46:09,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:46:09,442 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 129 flow [2023-11-19 07:46:09,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-11-19 07:46:09,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-19 07:46:09,443 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 129 flow [2023-11-19 07:46:09,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:09,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:09,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:09,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:46:09,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:46:09,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 170776573, now seen corresponding path program 1 times [2023-11-19 07:46:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237539547] [2023-11-19 07:46:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:10,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237539547] [2023-11-19 07:46:10,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237539547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:10,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:10,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:46:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292226790] [2023-11-19 07:46:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:46:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:46:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:46:10,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 309 [2023-11-19 07:46:10,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:10,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:10,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 309 [2023-11-19 07:46:10,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:11,300 INFO L124 PetriNetUnfolderBase]: 1025/1631 cut-off events. [2023-11-19 07:46:11,300 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-11-19 07:46:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 1631 events. 1025/1631 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8944 event pairs, 147 based on Foata normal form. 8/1344 useless extension candidates. Maximal degree in co-relation 3537. Up to 1328 conditions per place. [2023-11-19 07:46:11,316 INFO L140 encePairwiseOnDemand]: 296/309 looper letters, 76 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2023-11-19 07:46:11,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 468 flow [2023-11-19 07:46:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:46:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:46:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1001 transitions. [2023-11-19 07:46:11,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40493527508090615 [2023-11-19 07:46:11,322 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1001 transitions. [2023-11-19 07:46:11,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1001 transitions. [2023-11-19 07:46:11,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:11,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1001 transitions. [2023-11-19 07:46:11,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:11,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 309.0) internal successors, (2781), 9 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:11,336 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 309.0) internal successors, (2781), 9 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:11,336 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 129 flow. Second operand 8 states and 1001 transitions. [2023-11-19 07:46:11,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 468 flow [2023-11-19 07:46:11,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 100 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:46:11,342 INFO L231 Difference]: Finished difference. Result has 56 places, 70 transitions, 276 flow [2023-11-19 07:46:11,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=276, PETRI_PLACES=56, PETRI_TRANSITIONS=70} [2023-11-19 07:46:11,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-11-19 07:46:11,345 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 70 transitions, 276 flow [2023-11-19 07:46:11,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:11,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:11,347 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:46:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:46:11,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:46:11,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash 770415765, now seen corresponding path program 1 times [2023-11-19 07:46:11,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:11,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704802479] [2023-11-19 07:46:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:11,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:46:11,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:46:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:46:11,415 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:46:11,415 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:46:11,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:46:11,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 07:46:11,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-19 07:46:11,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 07:46:11,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 07:46:11,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 07:46:11,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 07:46:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:46:11,422 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:46:11,423 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:46:11,423 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:46:11,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:46:11,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,574 INFO L124 PetriNetUnfolderBase]: 31/267 cut-off events. [2023-11-19 07:46:11,574 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:46:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 31/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1008 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-19 07:46:11,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:46:11,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 230 transitions, 478 flow [2023-11-19 07:46:11,635 INFO L124 PetriNetUnfolderBase]: 31/267 cut-off events. [2023-11-19 07:46:11,635 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:46:11,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 31/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1008 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-19 07:46:11,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 31200 [2023-11-19 07:46:18,122 INFO L134 LiptonReduction]: Checked pairs total: 47499 [2023-11-19 07:46:18,122 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-11-19 07:46:18,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:18,125 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@70313279, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:18,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 07:46:18,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:46:18,130 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-19 07:46:18,131 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:46:18,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:18,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:46:18,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-19 07:46:18,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 872054599, now seen corresponding path program 1 times [2023-11-19 07:46:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:18,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527003551] [2023-11-19 07:46:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:18,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527003551] [2023-11-19 07:46:18,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527003551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:18,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:46:18,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623197939] [2023-11-19 07:46:18,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:46:18,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:46:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:46:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 436 [2023-11-19 07:46:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 75 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 436 [2023-11-19 07:46:18,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:23,689 INFO L124 PetriNetUnfolderBase]: 27945/37185 cut-off events. [2023-11-19 07:46:23,690 INFO L125 PetriNetUnfolderBase]: For 2032/2032 co-relation queries the response was YES. [2023-11-19 07:46:23,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74947 conditions, 37185 events. 27945/37185 cut-off events. For 2032/2032 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 218819 event pairs, 19935 based on Foata normal form. 0/25595 useless extension candidates. Maximal degree in co-relation 3321. Up to 36684 conditions per place. [2023-11-19 07:46:24,000 INFO L140 encePairwiseOnDemand]: 429/436 looper letters, 65 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2023-11-19 07:46:24,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 284 flow [2023-11-19 07:46:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:46:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:46:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 450 transitions. [2023-11-19 07:46:24,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160550458715596 [2023-11-19 07:46:24,004 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 450 transitions. [2023-11-19 07:46:24,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 450 transitions. [2023-11-19 07:46:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:24,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 450 transitions. [2023-11-19 07:46:24,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:24,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:24,012 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:24,012 INFO L175 Difference]: Start difference. First operand has 61 places, 75 transitions, 168 flow. Second operand 2 states and 450 transitions. [2023-11-19 07:46:24,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 284 flow [2023-11-19 07:46:24,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:46:24,021 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 152 flow [2023-11-19 07:46:24,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=152, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2023-11-19 07:46:24,023 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-11-19 07:46:24,023 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 152 flow [2023-11-19 07:46:24,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:24,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:24,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:46:24,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-19 07:46:24,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 532169735, now seen corresponding path program 1 times [2023-11-19 07:46:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:24,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717917816] [2023-11-19 07:46:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:24,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717917816] [2023-11-19 07:46:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717917816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:24,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:46:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591575281] [2023-11-19 07:46:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:46:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:46:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:24,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 436 [2023-11-19 07:46:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:24,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 436 [2023-11-19 07:46:24,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:28,598 INFO L124 PetriNetUnfolderBase]: 25095/33303 cut-off events. [2023-11-19 07:46:28,598 INFO L125 PetriNetUnfolderBase]: For 820/820 co-relation queries the response was YES. [2023-11-19 07:46:28,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67218 conditions, 33303 events. 25095/33303 cut-off events. For 820/820 co-relation queries the response was YES. Maximal size of possible extension queue 2083. Compared 196151 event pairs, 8895 based on Foata normal form. 0/23432 useless extension candidates. Maximal degree in co-relation 67212. Up to 31669 conditions per place. [2023-11-19 07:46:28,793 INFO L140 encePairwiseOnDemand]: 426/436 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-11-19 07:46:28,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 376 flow [2023-11-19 07:46:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:46:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-11-19 07:46:28,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47629969418960244 [2023-11-19 07:46:28,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-11-19 07:46:28,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-11-19 07:46:28,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:28,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-11-19 07:46:28,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:28,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:28,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:28,805 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 152 flow. Second operand 3 states and 623 transitions. [2023-11-19 07:46:28,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 376 flow [2023-11-19 07:46:28,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:46:28,812 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 188 flow [2023-11-19 07:46:28,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2023-11-19 07:46:28,815 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-11-19 07:46:28,816 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 188 flow [2023-11-19 07:46:28,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:28,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:28,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:28,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:46:28,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-19 07:46:28,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash 526974936, now seen corresponding path program 1 times [2023-11-19 07:46:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:28,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736732801] [2023-11-19 07:46:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736732801] [2023-11-19 07:46:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736732801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:29,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:46:29,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926098802] [2023-11-19 07:46:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:46:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:46:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:46:29,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 436 [2023-11-19 07:46:29,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 188 flow. Second operand has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:29,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:29,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 436 [2023-11-19 07:46:29,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:34,425 INFO L124 PetriNetUnfolderBase]: 26383/35230 cut-off events. [2023-11-19 07:46:34,426 INFO L125 PetriNetUnfolderBase]: For 4642/4642 co-relation queries the response was YES. [2023-11-19 07:46:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76218 conditions, 35230 events. 26383/35230 cut-off events. For 4642/4642 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 211169 event pairs, 6320 based on Foata normal form. 354/28232 useless extension candidates. Maximal degree in co-relation 76210. Up to 32928 conditions per place. [2023-11-19 07:46:34,880 INFO L140 encePairwiseOnDemand]: 417/436 looper letters, 139 selfloop transitions, 32 changer transitions 0/174 dead transitions. [2023-11-19 07:46:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 174 transitions, 830 flow [2023-11-19 07:46:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:46:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:46:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1462 transitions. [2023-11-19 07:46:34,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419151376146789 [2023-11-19 07:46:34,898 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1462 transitions. [2023-11-19 07:46:34,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1462 transitions. [2023-11-19 07:46:34,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:34,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1462 transitions. [2023-11-19 07:46:34,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 182.75) internal successors, (1462), 8 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:34,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:34,919 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:34,920 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 188 flow. Second operand 8 states and 1462 transitions. [2023-11-19 07:46:34,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 174 transitions, 830 flow [2023-11-19 07:46:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 174 transitions, 814 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:46:34,930 INFO L231 Difference]: Finished difference. Result has 76 places, 102 transitions, 431 flow [2023-11-19 07:46:34,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=431, PETRI_PLACES=76, PETRI_TRANSITIONS=102} [2023-11-19 07:46:34,933 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2023-11-19 07:46:34,933 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 102 transitions, 431 flow [2023-11-19 07:46:34,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:34,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:34,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:46:34,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-19 07:46:34,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1678309184, now seen corresponding path program 1 times [2023-11-19 07:46:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352303061] [2023-11-19 07:46:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352303061] [2023-11-19 07:46:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352303061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:46:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816910694] [2023-11-19 07:46:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:35,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:35,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09473d46-b00c-4262-9f67-3f8917621a00/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:46:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:36,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:46:36,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:36,176 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:46:36,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 07:46:36,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:46:36,274 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:46:36,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:46:36,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2023-11-19 07:46:36,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:46:36,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2023-11-19 07:46:36,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 18 [2023-11-19 07:46:36,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 60 [2023-11-19 07:46:36,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2023-11-19 07:46:36,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2023-11-19 07:46:36,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-19 07:46:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:46:36,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:46:36,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:46:36,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:46:36,810 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:46:36,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:46:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:46:36,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:36,914 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_123 (Array Int Int))) (< (mod |c_thr1Thread1of3ForFork0_inc_~inc__v~0#1| 4294967296) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_123) |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296))) is different from false [2023-11-19 07:46:36,930 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_123 (Array Int Int))) (< (mod |c_thr1Thread1of3ForFork0_inc_~inc__v~0#1| 4294967296) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_123) |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296))) (= (mod (select (select |c_#memory_int| |c_thr1Thread1of3ForFork0_inc_~#inc__casret~0#1.base|) |c_thr1Thread1of3ForFork0_inc_~#inc__casret~0#1.offset|) 4294967296) 0)) is different from false