./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --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_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/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_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/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_191ea3e9-529e-4a79-b84d-c181f3e03255/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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:14,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:14,130 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:14,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:14,136 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:14,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:14,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:14,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:14,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:14,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:14,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:14,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:14,170 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:14,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:14,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:14,172 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:14,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:14,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:14,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:14,174 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:14,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:14,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:14,175 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:14,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:14,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:14,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:14,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:14,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:14,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:14,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:14,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:14,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:14,180 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:14,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:14,181 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:14,181 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:14,182 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:14,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:14,182 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:14,183 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_191ea3e9-529e-4a79-b84d-c181f3e03255/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-19 07:35:14,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:14,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:14,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:14,518 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:14,519 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:14,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-19 07:35:17,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:17,834 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:17,835 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-19 07:35:17,844 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/data/4a8f3b55c/27142a82500b44409f34e2183691211b/FLAGf057b97df [2023-11-19 07:35:17,858 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/data/4a8f3b55c/27142a82500b44409f34e2183691211b [2023-11-19 07:35:17,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:17,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:17,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:17,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:17,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:17,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:17" (1/1) ... [2023-11-19 07:35:17,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c213dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17, skipping insertion in model container [2023-11-19 07:35:17,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:17" (1/1) ... [2023-11-19 07:35:17,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:18,082 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_191ea3e9-529e-4a79-b84d-c181f3e03255/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-19 07:35:18,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:18,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:18,121 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_191ea3e9-529e-4a79-b84d-c181f3e03255/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-19 07:35:18,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:18,133 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:18,133 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:18,141 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:18,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18 WrapperNode [2023-11-19 07:35:18,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:18,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:18,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:18,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:18,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,185 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-19 07:35:18,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:18,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:18,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:18,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:18,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:18,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:18,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:18,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:18,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (1/1) ... [2023-11-19 07:35:18,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:18,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:18,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:18,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:35:18,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:35:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:35:18,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:35:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:35:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:35:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:35:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:18,313 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 07:35:18,454 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:18,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:18,744 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:18,888 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:18,889 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:35:18,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:18 BoogieIcfgContainer [2023-11-19 07:35:18,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:18,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:18,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:18,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:18,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:17" (1/3) ... [2023-11-19 07:35:18,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73aa2351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:18, skipping insertion in model container [2023-11-19 07:35:18,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:18" (2/3) ... [2023-11-19 07:35:18,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73aa2351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:18, skipping insertion in model container [2023-11-19 07:35:18,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:18" (3/3) ... [2023-11-19 07:35:18,908 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-19 07:35:18,935 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:18,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:18,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:18,952 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:19,032 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:35:19,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 252 flow [2023-11-19 07:35:19,131 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-19 07:35:19,132 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:19,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-19 07:35:19,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 252 flow [2023-11-19 07:35:19,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2023-11-19 07:35:19,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:19,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-19 07:35:19,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-19 07:35:19,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 228 flow [2023-11-19 07:35:19,193 INFO L124 PetriNetUnfolderBase]: 9/108 cut-off events. [2023-11-19 07:35:19,193 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:19,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-19 07:35:19,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-11-19 07:35:23,241 INFO L134 LiptonReduction]: Checked pairs total: 578 [2023-11-19 07:35:23,242 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-19 07:35:23,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:23,264 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;@8aa896a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:23,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:35:23,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:23,270 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:35:23,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:23,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:23,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:23,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:23,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1378278166, now seen corresponding path program 1 times [2023-11-19 07:35:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375849656] [2023-11-19 07:35:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:23,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:23,627 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 07:35:23,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375849656] [2023-11-19 07:35:23,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375849656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:23,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:23,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939807187] [2023-11-19 07:35:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:23,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:23,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:23,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 231 [2023-11-19 07:35:23,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 07:35:23,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:23,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 231 [2023-11-19 07:35:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:23,788 INFO L124 PetriNetUnfolderBase]: 60/106 cut-off events. [2023-11-19 07:35:23,789 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:35:23,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 106 events. 60/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 268 event pairs, 14 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 168. Up to 53 conditions per place. [2023-11-19 07:35:23,795 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 19 selfloop transitions, 2 changer transitions 2/25 dead transitions. [2023-11-19 07:35:23,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 114 flow [2023-11-19 07:35:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-11-19 07:35:23,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-11-19 07:35:23,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-11-19 07:35:23,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-11-19 07:35:23,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:23,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-11-19 07:35:23,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 07:35:23,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 07:35:23,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 07:35:23,845 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 336 transitions. [2023-11-19 07:35:23,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 114 flow [2023-11-19 07:35:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:23,851 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-19 07:35:23,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-19 07:35:23,856 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:35:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-19 07:35:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 07:35:23,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:23,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:23,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:23,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:23,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1261719986, now seen corresponding path program 1 times [2023-11-19 07:35:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:23,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618568207] [2023-11-19 07:35:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:24,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:24,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618568207] [2023-11-19 07:35:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618568207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:24,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:24,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739411148] [2023-11-19 07:35:24,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:24,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:24,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:24,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-19 07:35:24,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 07:35:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-19 07:35:24,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:24,131 INFO L124 PetriNetUnfolderBase]: 52/105 cut-off events. [2023-11-19 07:35:24,131 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:35:24,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 105 events. 52/105 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 308 event pairs, 17 based on Foata normal form. 6/94 useless extension candidates. Maximal degree in co-relation 138. Up to 74 conditions per place. [2023-11-19 07:35:24,133 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 18 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-11-19 07:35:24,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 121 flow [2023-11-19 07:35:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-19 07:35:24,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906204906204906 [2023-11-19 07:35:24,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-19 07:35:24,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-19 07:35:24,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:24,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-19 07:35:24,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 07:35:24,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 07:35:24,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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 07:35:24,141 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 340 transitions. [2023-11-19 07:35:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 121 flow [2023-11-19 07:35:24,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:24,143 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-19 07:35:24,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-19 07:35:24,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-19 07:35:24,144 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-19 07:35:24,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 07:35:24,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:24,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:24,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:35:24,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:24,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash -501695879, now seen corresponding path program 1 times [2023-11-19 07:35:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135581169] [2023-11-19 07:35:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:24,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135581169] [2023-11-19 07:35:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135581169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:24,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:24,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:24,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592538101] [2023-11-19 07:35:24,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:35:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:35:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:35:24,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 231 [2023-11-19 07:35:24,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 07:35:24,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:24,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 231 [2023-11-19 07:35:24,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:24,528 INFO L124 PetriNetUnfolderBase]: 61/138 cut-off events. [2023-11-19 07:35:24,528 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-19 07:35:24,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 138 events. 61/138 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 500 event pairs, 44 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 220. Up to 103 conditions per place. [2023-11-19 07:35:24,530 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 16 selfloop transitions, 2 changer transitions 10/30 dead transitions. [2023-11-19 07:35:24,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 142 flow [2023-11-19 07:35:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-11-19 07:35:24,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45346320346320346 [2023-11-19 07:35:24,533 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-11-19 07:35:24,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-11-19 07:35:24,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:24,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-11-19 07:35:24,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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 07:35:24,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 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 07:35:24,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 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 07:35:24,540 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 419 transitions. [2023-11-19 07:35:24,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 142 flow [2023-11-19 07:35:24,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:24,542 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-19 07:35:24,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-19 07:35:24,543 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-19 07:35:24,544 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-19 07:35:24,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 07:35:24,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:24,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:35:24,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:24,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash -746487760, now seen corresponding path program 1 times [2023-11-19 07:35:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134436666] [2023-11-19 07:35:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:25,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134436666] [2023-11-19 07:35:25,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134436666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608977190] [2023-11-19 07:35:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:25,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:25,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:25,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:35:25,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:25,435 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 07:35:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:25,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:25,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:25,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 34 [2023-11-19 07:35:25,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 3 [2023-11-19 07:35:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608977190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:25,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:25,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-19 07:35:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158989118] [2023-11-19 07:35:25,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:25,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=167, Unknown=3, NotChecked=0, Total=210 [2023-11-19 07:35:26,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-19 07:35:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 15 states, 15 states have (on average 85.2) internal successors, (1278), 15 states have internal predecessors, (1278), 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 07:35:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:26,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-19 07:35:26,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:26,281 INFO L124 PetriNetUnfolderBase]: 68/135 cut-off events. [2023-11-19 07:35:26,281 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-19 07:35:26,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 135 events. 68/135 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 403 event pairs, 9 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 321. Up to 37 conditions per place. [2023-11-19 07:35:26,283 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 27 selfloop transitions, 5 changer transitions 9/43 dead transitions. [2023-11-19 07:35:26,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 213 flow [2023-11-19 07:35:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 539 transitions. [2023-11-19 07:35:26,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-11-19 07:35:26,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 539 transitions. [2023-11-19 07:35:26,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 539 transitions. [2023-11-19 07:35:26,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:26,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 539 transitions. [2023-11-19 07:35:26,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 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 07:35:26,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 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 07:35:26,294 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 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 07:35:26,294 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 6 states and 539 transitions. [2023-11-19 07:35:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 213 flow [2023-11-19 07:35:26,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 207 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:26,297 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 86 flow [2023-11-19 07:35:26,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-19 07:35:26,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-11-19 07:35:26,299 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 86 flow [2023-11-19 07:35:26,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.2) internal successors, (1278), 15 states have internal predecessors, (1278), 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 07:35:26,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:26,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:26,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:26,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:26,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:26,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2015139898, now seen corresponding path program 2 times [2023-11-19 07:35:26,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:26,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633438069] [2023-11-19 07:35:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:26,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633438069] [2023-11-19 07:35:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633438069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343889281] [2023-11-19 07:35:26,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:26,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:26,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:26,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:26,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:35:26,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:26,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343889281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:26,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:26,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-19 07:35:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135355103] [2023-11-19 07:35:26,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:26,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-19 07:35:26,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:26,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:26,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-19 07:35:26,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:26,892 INFO L124 PetriNetUnfolderBase]: 140/278 cut-off events. [2023-11-19 07:35:26,893 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-11-19 07:35:26,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 278 events. 140/278 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1104 event pairs, 41 based on Foata normal form. 12/290 useless extension candidates. Maximal degree in co-relation 702. Up to 111 conditions per place. [2023-11-19 07:35:26,896 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 35 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-19 07:35:26,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 250 flow [2023-11-19 07:35:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-11-19 07:35:26,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945887445887446 [2023-11-19 07:35:26,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-11-19 07:35:26,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-11-19 07:35:26,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:26,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-11-19 07:35:26,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 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 07:35:26,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 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 07:35:26,905 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 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 07:35:26,905 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 86 flow. Second operand 4 states and 457 transitions. [2023-11-19 07:35:26,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 250 flow [2023-11-19 07:35:26,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 236 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:26,908 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 140 flow [2023-11-19 07:35:26,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-19 07:35:26,910 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-19 07:35:26,910 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 140 flow [2023-11-19 07:35:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:26,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:26,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:26,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:27,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:27,133 INFO L85 PathProgramCache]: Analyzing trace with hash 645020739, now seen corresponding path program 3 times [2023-11-19 07:35:27,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227704077] [2023-11-19 07:35:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:27,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227704077] [2023-11-19 07:35:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227704077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129148233] [2023-11-19 07:35:27,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:27,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:27,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:27,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:27,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:35:27,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:27,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:35:27,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:27,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:27,800 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-19 07:35:27,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 13 [2023-11-19 07:35:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:27,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129148233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:27,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:27,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-19 07:35:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603291917] [2023-11-19 07:35:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:27,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:28,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 231 [2023-11-19 07:35:28,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 140 flow. Second operand has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 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 07:35:28,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:28,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 231 [2023-11-19 07:35:28,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:28,733 INFO L124 PetriNetUnfolderBase]: 194/416 cut-off events. [2023-11-19 07:35:28,733 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2023-11-19 07:35:28,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 416 events. 194/416 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1983 event pairs, 70 based on Foata normal form. 19/433 useless extension candidates. Maximal degree in co-relation 816. Up to 178 conditions per place. [2023-11-19 07:35:28,736 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 26 selfloop transitions, 5 changer transitions 42/75 dead transitions. [2023-11-19 07:35:28,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 75 transitions, 441 flow [2023-11-19 07:35:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:35:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:35:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 929 transitions. [2023-11-19 07:35:28,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40216450216450217 [2023-11-19 07:35:28,741 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 929 transitions. [2023-11-19 07:35:28,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 929 transitions. [2023-11-19 07:35:28,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:28,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 929 transitions. [2023-11-19 07:35:28,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.9) internal successors, (929), 10 states have internal predecessors, (929), 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 07:35:28,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 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 07:35:28,751 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 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 07:35:28,751 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 140 flow. Second operand 10 states and 929 transitions. [2023-11-19 07:35:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 75 transitions, 441 flow [2023-11-19 07:35:28,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 431 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:28,756 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 168 flow [2023-11-19 07:35:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-11-19 07:35:28,757 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-19 07:35:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 168 flow [2023-11-19 07:35:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 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 07:35:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:28,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:28,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:28,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:28,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:28,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1642046884, now seen corresponding path program 4 times [2023-11-19 07:35:28,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:28,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824358434] [2023-11-19 07:35:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:28,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824358434] [2023-11-19 07:35:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824358434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903412453] [2023-11-19 07:35:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:29,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:29,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:29,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:29,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:29,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:35:29,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:29,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:29,833 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:35:29,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 11 [2023-11-19 07:35:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903412453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:29,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:29,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2023-11-19 07:35:29,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241716576] [2023-11-19 07:35:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:29,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:35:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:35:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:35:30,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 231 [2023-11-19 07:35:30,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 168 flow. Second operand has 14 states, 14 states have (on average 93.5) internal successors, (1309), 14 states have internal predecessors, (1309), 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 07:35:30,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:30,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 231 [2023-11-19 07:35:30,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:30,627 INFO L124 PetriNetUnfolderBase]: 332/635 cut-off events. [2023-11-19 07:35:30,628 INFO L125 PetriNetUnfolderBase]: For 949/949 co-relation queries the response was YES. [2023-11-19 07:35:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 635 events. 332/635 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3142 event pairs, 21 based on Foata normal form. 5/639 useless extension candidates. Maximal degree in co-relation 1956. Up to 126 conditions per place. [2023-11-19 07:35:30,633 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 67 selfloop transitions, 27 changer transitions 51/147 dead transitions. [2023-11-19 07:35:30,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 147 transitions, 884 flow [2023-11-19 07:35:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:35:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:35:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1874 transitions. [2023-11-19 07:35:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269765322396901 [2023-11-19 07:35:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1874 transitions. [2023-11-19 07:35:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1874 transitions. [2023-11-19 07:35:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1874 transitions. [2023-11-19 07:35:30,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.63157894736842) internal successors, (1874), 19 states have internal predecessors, (1874), 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 07:35:30,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 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 07:35:30,664 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 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 07:35:30,665 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 168 flow. Second operand 19 states and 1874 transitions. [2023-11-19 07:35:30,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 147 transitions, 884 flow [2023-11-19 07:35:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 147 transitions, 848 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-19 07:35:30,673 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 377 flow [2023-11-19 07:35:30,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=377, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-19 07:35:30,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-11-19 07:35:30,674 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 377 flow [2023-11-19 07:35:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.5) internal successors, (1309), 14 states have internal predecessors, (1309), 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 07:35:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:30,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:30,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:30,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:30,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:30,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:30,891 INFO L85 PathProgramCache]: Analyzing trace with hash -56468956, now seen corresponding path program 5 times [2023-11-19 07:35:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761299889] [2023-11-19 07:35:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:31,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:31,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761299889] [2023-11-19 07:35:31,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761299889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:31,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374318275] [2023-11-19 07:35:31,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:35:31,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:31,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:31,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:31,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:31,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:35:31,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:31,790 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 20 treesize of output 15 [2023-11-19 07:35:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:31,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:32,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:32,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 35 [2023-11-19 07:35:32,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 3 [2023-11-19 07:35:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374318275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:32,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:32,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-19 07:35:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277124876] [2023-11-19 07:35:32,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:35:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:35:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=400, Unknown=1, NotChecked=0, Total=462 [2023-11-19 07:35:34,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:35:34,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2023-11-19 07:35:34,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 377 flow. Second operand has 22 states, 22 states have (on average 79.0909090909091) internal successors, (1740), 22 states have internal predecessors, (1740), 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 07:35:34,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:34,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2023-11-19 07:35:34,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:35,439 INFO L124 PetriNetUnfolderBase]: 348/664 cut-off events. [2023-11-19 07:35:35,440 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2023-11-19 07:35:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 664 events. 348/664 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3283 event pairs, 27 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 2181. Up to 132 conditions per place. [2023-11-19 07:35:35,446 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 54 selfloop transitions, 29 changer transitions 42/127 dead transitions. [2023-11-19 07:35:35,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 872 flow [2023-11-19 07:35:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:35:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:35:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1346 transitions. [2023-11-19 07:35:35,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36417748917748916 [2023-11-19 07:35:35,453 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1346 transitions. [2023-11-19 07:35:35,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1346 transitions. [2023-11-19 07:35:35,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:35,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1346 transitions. [2023-11-19 07:35:35,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 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 07:35:35,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 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 07:35:35,467 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 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 07:35:35,467 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 377 flow. Second operand 16 states and 1346 transitions. [2023-11-19 07:35:35,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 872 flow [2023-11-19 07:35:35,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 127 transitions, 742 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-11-19 07:35:35,478 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 350 flow [2023-11-19 07:35:35,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=350, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-11-19 07:35:35,482 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2023-11-19 07:35:35,482 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 350 flow [2023-11-19 07:35:35,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.0909090909091) internal successors, (1740), 22 states have internal predecessors, (1740), 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 07:35:35,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:35,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:35,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:35,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:35,703 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:35,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1371622698, now seen corresponding path program 6 times [2023-11-19 07:35:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:35,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395744993] [2023-11-19 07:35:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:35,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395744993] [2023-11-19 07:35:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395744993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287538645] [2023-11-19 07:35:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:35:35,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:35,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:35,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:35:35,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:35:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:35,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:35:35,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:36,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:36,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287538645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:36,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:36,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-11-19 07:35:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11563279] [2023-11-19 07:35:36,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:35:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:35:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:35:36,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 231 [2023-11-19 07:35:36,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 96.66666666666667) internal successors, (1740), 18 states have internal predecessors, (1740), 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 07:35:36,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:36,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 231 [2023-11-19 07:35:36,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:37,339 INFO L124 PetriNetUnfolderBase]: 971/1871 cut-off events. [2023-11-19 07:35:37,339 INFO L125 PetriNetUnfolderBase]: For 3228/3228 co-relation queries the response was YES. [2023-11-19 07:35:37,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 1871 events. 971/1871 cut-off events. For 3228/3228 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11996 event pairs, 179 based on Foata normal form. 52/1923 useless extension candidates. Maximal degree in co-relation 5025. Up to 451 conditions per place. [2023-11-19 07:35:37,353 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 53 selfloop transitions, 41 changer transitions 65/161 dead transitions. [2023-11-19 07:35:37,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 161 transitions, 1314 flow [2023-11-19 07:35:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:35:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:35:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1421 transitions. [2023-11-19 07:35:37,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-11-19 07:35:37,366 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1421 transitions. [2023-11-19 07:35:37,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1421 transitions. [2023-11-19 07:35:37,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:37,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1421 transitions. [2023-11-19 07:35:37,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 101.5) internal successors, (1421), 14 states have internal predecessors, (1421), 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 07:35:37,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 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 07:35:37,384 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 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 07:35:37,384 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 350 flow. Second operand 14 states and 1421 transitions. [2023-11-19 07:35:37,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 161 transitions, 1314 flow [2023-11-19 07:35:37,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1203 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-19 07:35:37,405 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 641 flow [2023-11-19 07:35:37,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=641, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-11-19 07:35:37,406 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2023-11-19 07:35:37,406 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 641 flow [2023-11-19 07:35:37,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.66666666666667) internal successors, (1740), 18 states have internal predecessors, (1740), 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 07:35:37,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:37,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:37,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:37,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:37,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1538003090, now seen corresponding path program 7 times [2023-11-19 07:35:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:37,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119713145] [2023-11-19 07:35:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:38,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119713145] [2023-11-19 07:35:38,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119713145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194776610] [2023-11-19 07:35:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:35:38,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:38,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:38,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:35:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:38,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 07:35:38,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:38,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-19 07:35:38,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-19 07:35:38,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 07:35:38,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 07:35:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:38,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:39,468 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ .cse1 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2023-11-19 07:35:39,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:39,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-19 07:35:39,499 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:35:39,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 340 treesize of output 301 [2023-11-19 07:35:39,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:35:39,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 105 treesize of output 88 [2023-11-19 07:35:39,528 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:35:39,529 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 101 treesize of output 67 [2023-11-19 07:35:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-11-19 07:35:39,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194776610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:39,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:39,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 31 [2023-11-19 07:35:39,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674730778] [2023-11-19 07:35:39,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:35:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:35:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=4, NotChecked=60, Total=1056 [2023-11-19 07:35:39,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-19 07:35:39,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 641 flow. Second operand has 33 states, 33 states have (on average 75.51515151515152) internal successors, (2492), 33 states have internal predecessors, (2492), 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 07:35:39,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:39,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-19 07:35:39,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:43,413 INFO L124 PetriNetUnfolderBase]: 1468/2741 cut-off events. [2023-11-19 07:35:43,413 INFO L125 PetriNetUnfolderBase]: For 5530/5530 co-relation queries the response was YES. [2023-11-19 07:35:43,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9180 conditions, 2741 events. 1468/2741 cut-off events. For 5530/5530 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17788 event pairs, 103 based on Foata normal form. 16/2757 useless extension candidates. Maximal degree in co-relation 9131. Up to 564 conditions per place. [2023-11-19 07:35:43,433 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 150 selfloop transitions, 117 changer transitions 111/380 dead transitions. [2023-11-19 07:35:43,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 380 transitions, 2791 flow [2023-11-19 07:35:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:35:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-19 07:35:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3351 transitions. [2023-11-19 07:35:43,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35381691479252453 [2023-11-19 07:35:43,447 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3351 transitions. [2023-11-19 07:35:43,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3351 transitions. [2023-11-19 07:35:43,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:43,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3351 transitions. [2023-11-19 07:35:43,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 81.73170731707317) internal successors, (3351), 41 states have internal predecessors, (3351), 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 07:35:43,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 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 07:35:43,481 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 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 07:35:43,481 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 641 flow. Second operand 41 states and 3351 transitions. [2023-11-19 07:35:43,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 380 transitions, 2791 flow [2023-11-19 07:35:43,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 380 transitions, 2655 flow, removed 66 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:43,512 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1699 flow [2023-11-19 07:35:43,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1699, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2023-11-19 07:35:43,513 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-11-19 07:35:43,514 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1699 flow [2023-11-19 07:35:43,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 75.51515151515152) internal successors, (2492), 33 states have internal predecessors, (2492), 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 07:35:43,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:43,532 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:43,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:43,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:35:43,754 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:43,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -48397002, now seen corresponding path program 8 times [2023-11-19 07:35:43,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:43,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309472569] [2023-11-19 07:35:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:43,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309472569] [2023-11-19 07:35:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309472569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179557220] [2023-11-19 07:35:44,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:44,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:44,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:44,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:44,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:35:44,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:44,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:44,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:35:44,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:44,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:44,940 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:35:44,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 11 [2023-11-19 07:35:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179557220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:45,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 19 [2023-11-19 07:35:45,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456879132] [2023-11-19 07:35:45,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:45,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:35:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:35:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:35:45,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 231 [2023-11-19 07:35:45,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 93.0) internal successors, (1953), 21 states have internal predecessors, (1953), 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 07:35:45,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:45,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 231 [2023-11-19 07:35:45,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:48,649 INFO L124 PetriNetUnfolderBase]: 2140/3951 cut-off events. [2023-11-19 07:35:48,649 INFO L125 PetriNetUnfolderBase]: For 16329/16329 co-relation queries the response was YES. [2023-11-19 07:35:48,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15237 conditions, 3951 events. 2140/3951 cut-off events. For 16329/16329 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26591 event pairs, 193 based on Foata normal form. 20/3971 useless extension candidates. Maximal degree in co-relation 15178. Up to 828 conditions per place. [2023-11-19 07:35:48,690 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 151 selfloop transitions, 181 changer transitions 128/462 dead transitions. [2023-11-19 07:35:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 462 transitions, 4239 flow [2023-11-19 07:35:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-19 07:35:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-19 07:35:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4248 transitions. [2023-11-19 07:35:48,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766535789791604 [2023-11-19 07:35:48,704 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4248 transitions. [2023-11-19 07:35:48,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4248 transitions. [2023-11-19 07:35:48,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:48,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4248 transitions. [2023-11-19 07:35:48,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 98.79069767441861) internal successors, (4248), 43 states have internal predecessors, (4248), 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 07:35:48,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 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 07:35:48,742 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 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 07:35:48,743 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1699 flow. Second operand 43 states and 4248 transitions. [2023-11-19 07:35:48,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 462 transitions, 4239 flow [2023-11-19 07:35:48,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 462 transitions, 3926 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-11-19 07:35:48,874 INFO L231 Difference]: Finished difference. Result has 157 places, 202 transitions, 2765 flow [2023-11-19 07:35:48,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2765, PETRI_PLACES=157, PETRI_TRANSITIONS=202} [2023-11-19 07:35:48,877 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-11-19 07:35:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 202 transitions, 2765 flow [2023-11-19 07:35:48,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.0) internal successors, (1953), 21 states have internal predecessors, (1953), 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 07:35:48,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:48,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:48,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:49,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:49,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1082637648, now seen corresponding path program 9 times [2023-11-19 07:35:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518743366] [2023-11-19 07:35:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:50,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:50,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518743366] [2023-11-19 07:35:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518743366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:50,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864822108] [2023-11-19 07:35:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:50,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:50,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:50,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:35:50,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:35:50,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:50,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:35:50,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:50,795 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 18 treesize of output 13 [2023-11-19 07:35:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:50,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:51,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:51,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 35 [2023-11-19 07:35:51,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 3 [2023-11-19 07:35:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864822108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:51,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:51,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2023-11-19 07:35:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83406081] [2023-11-19 07:35:51,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 07:35:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 07:35:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=900, Unknown=3, NotChecked=0, Total=992 [2023-11-19 07:35:53,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2023-11-19 07:35:53,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 202 transitions, 2765 flow. Second operand has 32 states, 32 states have (on average 78.71875) internal successors, (2519), 32 states have internal predecessors, (2519), 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 07:35:53,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:53,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2023-11-19 07:35:53,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:56,978 INFO L124 PetriNetUnfolderBase]: 2460/4531 cut-off events. [2023-11-19 07:35:56,978 INFO L125 PetriNetUnfolderBase]: For 19192/19192 co-relation queries the response was YES. [2023-11-19 07:35:57,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18526 conditions, 4531 events. 2460/4531 cut-off events. For 19192/19192 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30945 event pairs, 234 based on Foata normal form. 1/4532 useless extension candidates. Maximal degree in co-relation 18456. Up to 980 conditions per place. [2023-11-19 07:35:57,066 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 90 selfloop transitions, 206 changer transitions 60/358 dead transitions. [2023-11-19 07:35:57,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 358 transitions, 4326 flow [2023-11-19 07:35:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:35:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:35:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2015 transitions. [2023-11-19 07:35:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3634559884559885 [2023-11-19 07:35:57,079 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2015 transitions. [2023-11-19 07:35:57,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2015 transitions. [2023-11-19 07:35:57,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:57,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2015 transitions. [2023-11-19 07:35:57,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 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 07:35:57,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 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 07:35:57,112 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 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 07:35:57,113 INFO L175 Difference]: Start difference. First operand has 157 places, 202 transitions, 2765 flow. Second operand 24 states and 2015 transitions. [2023-11-19 07:35:57,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 358 transitions, 4326 flow [2023-11-19 07:35:57,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 358 transitions, 3854 flow, removed 60 selfloop flow, removed 25 redundant places. [2023-11-19 07:35:57,340 INFO L231 Difference]: Finished difference. Result has 156 places, 228 transitions, 3120 flow [2023-11-19 07:35:57,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3120, PETRI_PLACES=156, PETRI_TRANSITIONS=228} [2023-11-19 07:35:57,342 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-11-19 07:35:57,342 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 228 transitions, 3120 flow [2023-11-19 07:35:57,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 78.71875) internal successors, (2519), 32 states have internal predecessors, (2519), 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 07:35:57,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:57,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:57,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:57,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:35:57,570 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:57,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1500307014, now seen corresponding path program 10 times [2023-11-19 07:35:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427136968] [2023-11-19 07:35:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427136968] [2023-11-19 07:35:58,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427136968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075600467] [2023-11-19 07:35:58,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:58,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:58,029 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:58,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:35:58,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:58,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:58,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:58,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:58,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075600467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:58,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-11-19 07:35:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041772472] [2023-11-19 07:35:58,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:35:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:58,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:35:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:35:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 231 [2023-11-19 07:35:58,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 228 transitions, 3120 flow. Second operand has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 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 07:35:58,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:58,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 231 [2023-11-19 07:35:58,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:02,938 INFO L124 PetriNetUnfolderBase]: 6109/11483 cut-off events. [2023-11-19 07:36:02,938 INFO L125 PetriNetUnfolderBase]: For 57656/57656 co-relation queries the response was YES. [2023-11-19 07:36:03,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45610 conditions, 11483 events. 6109/11483 cut-off events. For 57656/57656 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 95113 event pairs, 1071 based on Foata normal form. 330/11813 useless extension candidates. Maximal degree in co-relation 42434. Up to 2913 conditions per place. [2023-11-19 07:36:03,053 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 143 selfloop transitions, 250 changer transitions 193/588 dead transitions. [2023-11-19 07:36:03,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 588 transitions, 8534 flow [2023-11-19 07:36:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:36:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:36:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2050 transitions. [2023-11-19 07:36:03,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2023-11-19 07:36:03,069 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2050 transitions. [2023-11-19 07:36:03,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2050 transitions. [2023-11-19 07:36:03,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:03,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2050 transitions. [2023-11-19 07:36:03,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 102.5) internal successors, (2050), 20 states have internal predecessors, (2050), 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 07:36:03,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 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 07:36:03,098 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 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 07:36:03,098 INFO L175 Difference]: Start difference. First operand has 156 places, 228 transitions, 3120 flow. Second operand 20 states and 2050 transitions. [2023-11-19 07:36:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 588 transitions, 8534 flow [2023-11-19 07:36:03,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 588 transitions, 8246 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-11-19 07:36:03,852 INFO L231 Difference]: Finished difference. Result has 172 places, 362 transitions, 6272 flow [2023-11-19 07:36:03,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6272, PETRI_PLACES=172, PETRI_TRANSITIONS=362} [2023-11-19 07:36:03,854 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-11-19 07:36:03,854 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 362 transitions, 6272 flow [2023-11-19 07:36:03,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.64285714285714) internal successors, (1367), 14 states have internal predecessors, (1367), 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 07:36:03,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:03,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:03,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-19 07:36:04,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:04,062 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:36:04,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1348469328, now seen corresponding path program 11 times [2023-11-19 07:36:04,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:04,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682398452] [2023-11-19 07:36:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682398452] [2023-11-19 07:36:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682398452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925461450] [2023-11-19 07:36:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:36:05,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:05,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191ea3e9-529e-4a79-b84d-c181f3e03255/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:36:05,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:36:05,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:05,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-19 07:36:05,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:05,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-19 07:36:05,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 07:36:05,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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