./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl --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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:03:09,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:03:09,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:03:09,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:03:09,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:03:09,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:03:09,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:03:09,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:03:09,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:03:09,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:03:09,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:03:09,245 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:03:09,245 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:03:09,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:03:09,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:03:09,248 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:03:09,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:03:09,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:03:09,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:03:09,250 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:03:09,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:03:09,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:03:09,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:03:09,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:03:09,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:03:09,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:03:09,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:03:09,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:03:09,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:09,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:03:09,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:03:09,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:03:09,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:03:09,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:03:09,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:03:09,258 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:03:09,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:03:09,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:03:09,259 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:03:09,260 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_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2023-11-12 02:03:09,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:03:09,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:03:09,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:03:09,623 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:03:09,623 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:03:09,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-12 02:03:12,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:03:12,958 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:03:12,958 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-12 02:03:12,970 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/data/b118e34c2/463cad8f744b4c3fb4fe08d8d0733f8d/FLAGe858379ad [2023-11-12 02:03:12,991 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/data/b118e34c2/463cad8f744b4c3fb4fe08d8d0733f8d [2023-11-12 02:03:12,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:03:13,000 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:03:13,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:13,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:03:13,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:03:13,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:12" (1/1) ... [2023-11-12 02:03:13,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a8ee108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13, skipping insertion in model container [2023-11-12 02:03:13,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:12" (1/1) ... [2023-11-12 02:03:13,047 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:03:13,320 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_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2023-11-12 02:03:13,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:13,351 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:03:13,381 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_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2023-11-12 02:03:13,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:13,407 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:03:13,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13 WrapperNode [2023-11-12 02:03:13,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:13,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:13,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:03:13,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:03:13,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,478 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 146 [2023-11-12 02:03:13,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:13,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:03:13,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:03:13,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:03:13,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,503 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:03:13,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:03:13,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:03:13,525 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:03:13,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (1/1) ... [2023-11-12 02:03:13,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:13,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:03:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:03:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:03:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:03:13,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:03:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:03:13,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:03:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:03:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:03:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:03:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:03:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:03:13,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:03:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:03:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:03:13,612 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:03:13,728 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:03:13,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:03:14,077 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:03:14,088 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:03:14,088 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:03:14,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:14 BoogieIcfgContainer [2023-11-12 02:03:14,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:03:14,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:03:14,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:03:14,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:03:14,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:03:12" (1/3) ... [2023-11-12 02:03:14,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2c487b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:14, skipping insertion in model container [2023-11-12 02:03:14,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:13" (2/3) ... [2023-11-12 02:03:14,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2c487b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:14, skipping insertion in model container [2023-11-12 02:03:14,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:14" (3/3) ... [2023-11-12 02:03:14,109 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-11-12 02:03:14,118 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:03:14,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:03:14,128 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:03:14,128 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:03:14,238 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:03:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 181 transitions, 376 flow [2023-11-12 02:03:14,385 INFO L124 PetriNetUnfolderBase]: 15/179 cut-off events. [2023-11-12 02:03:14,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:03:14,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 179 events. 15/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-11-12 02:03:14,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 181 transitions, 376 flow [2023-11-12 02:03:14,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 170 transitions, 352 flow [2023-11-12 02:03:14,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:03:14,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 170 transitions, 352 flow [2023-11-12 02:03:14,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 170 transitions, 352 flow [2023-11-12 02:03:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 352 flow [2023-11-12 02:03:14,488 INFO L124 PetriNetUnfolderBase]: 15/170 cut-off events. [2023-11-12 02:03:14,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:03:14,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 15/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-11-12 02:03:14,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 3132 [2023-11-12 02:03:20,386 INFO L134 LiptonReduction]: Checked pairs total: 3082 [2023-11-12 02:03:20,389 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-12 02:03:20,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:03:20,440 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;@5728f2e6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:03:20,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:03:20,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:03:20,456 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:03:20,456 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:03:20,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:20,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:20,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:20,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash -78682372, now seen corresponding path program 1 times [2023-11-12 02:03:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847465663] [2023-11-12 02:03:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:20,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847465663] [2023-11-12 02:03:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847465663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:20,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:20,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:03:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045446297] [2023-11-12 02:03:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:20,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:03:21,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:03:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:03:21,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 381 [2023-11-12 02:03:21,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:21,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 381 [2023-11-12 02:03:21,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:21,171 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-12 02:03:21,172 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:03:21,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-12 02:03:21,174 INFO L140 encePairwiseOnDemand]: 378/381 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-12 02:03:21,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-12 02:03:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:03:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:03:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-11-12 02:03:21,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339457567804024 [2023-11-12 02:03:21,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-11-12 02:03:21,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-11-12 02:03:21,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:21,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-11-12 02:03:21,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,218 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 496 transitions. [2023-11-12 02:03:21,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-12 02:03:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:03:21,224 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-12 02:03:21,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, 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} [2023-11-12 02:03:21,230 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:03:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-12 02:03:21,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:21,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:03:21,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:21,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 765979930, now seen corresponding path program 1 times [2023-11-12 02:03:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:21,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109110313] [2023-11-12 02:03:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:21,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:21,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109110313] [2023-11-12 02:03:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109110313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:03:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837175061] [2023-11-12 02:03:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:21,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:03:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:21,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:03:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:03:21,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 381 [2023-11-12 02:03:21,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:21,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:21,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 381 [2023-11-12 02:03:21,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:22,038 INFO L124 PetriNetUnfolderBase]: 74/136 cut-off events. [2023-11-12 02:03:22,038 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:03:22,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 136 events. 74/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 377 event pairs, 3 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 276. Up to 85 conditions per place. [2023-11-12 02:03:22,040 INFO L140 encePairwiseOnDemand]: 373/381 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-11-12 02:03:22,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 204 flow [2023-11-12 02:03:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:03:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:03:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2023-11-12 02:03:22,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40638670166229224 [2023-11-12 02:03:22,047 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2023-11-12 02:03:22,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2023-11-12 02:03:22,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:22,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2023-11-12 02:03:22,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 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) [2023-11-12 02:03:22,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,062 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 929 transitions. [2023-11-12 02:03:22,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 204 flow [2023-11-12 02:03:22,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 200 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:03:22,065 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2023-11-12 02:03:22,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2023-11-12 02:03:22,066 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-12 02:03:22,066 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2023-11-12 02:03:22,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:22,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:22,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:03:22,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1415924750, now seen corresponding path program 2 times [2023-11-12 02:03:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152367339] [2023-11-12 02:03:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:22,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:22,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152367339] [2023-11-12 02:03:22,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152367339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:22,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:03:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538012065] [2023-11-12 02:03:22,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:03:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:03:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:03:22,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 381 [2023-11-12 02:03:22,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 152.5) internal successors, (915), 6 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:22,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 381 [2023-11-12 02:03:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:22,634 INFO L124 PetriNetUnfolderBase]: 73/137 cut-off events. [2023-11-12 02:03:22,634 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-12 02:03:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 137 events. 73/137 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 375 event pairs, 4 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 395. Up to 85 conditions per place. [2023-11-12 02:03:22,637 INFO L140 encePairwiseOnDemand]: 373/381 looper letters, 32 selfloop transitions, 15 changer transitions 2/49 dead transitions. [2023-11-12 02:03:22,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 278 flow [2023-11-12 02:03:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:03:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:03:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1096 transitions. [2023-11-12 02:03:22,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41094863142107235 [2023-11-12 02:03:22,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1096 transitions. [2023-11-12 02:03:22,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1096 transitions. [2023-11-12 02:03:22,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:22,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1096 transitions. [2023-11-12 02:03:22,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,657 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,657 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 1096 transitions. [2023-11-12 02:03:22,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 278 flow [2023-11-12 02:03:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-12 02:03:22,660 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2023-11-12 02:03:22,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-11-12 02:03:22,662 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-12 02:03:22,662 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2023-11-12 02:03:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 152.5) internal successors, (915), 6 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:22,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:03:22,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:22,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash -375982242, now seen corresponding path program 3 times [2023-11-12 02:03:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:22,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337662520] [2023-11-12 02:03:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:22,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337662520] [2023-11-12 02:03:22,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337662520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:22,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:22,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:03:22,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986547878] [2023-11-12 02:03:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:03:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:03:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:03:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 381 [2023-11-12 02:03:22,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:22,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:22,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 381 [2023-11-12 02:03:22,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:23,106 INFO L124 PetriNetUnfolderBase]: 91/173 cut-off events. [2023-11-12 02:03:23,106 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-12 02:03:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 173 events. 91/173 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 507 event pairs, 15 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 566. Up to 66 conditions per place. [2023-11-12 02:03:23,109 INFO L140 encePairwiseOnDemand]: 373/381 looper letters, 38 selfloop transitions, 16 changer transitions 2/56 dead transitions. [2023-11-12 02:03:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 365 flow [2023-11-12 02:03:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:03:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:03:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 937 transitions. [2023-11-12 02:03:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098862642169729 [2023-11-12 02:03:23,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 937 transitions. [2023-11-12 02:03:23,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 937 transitions. [2023-11-12 02:03:23,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:23,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 937 transitions. [2023-11-12 02:03:23,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.16666666666666) internal successors, (937), 6 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:23,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:23,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:23,141 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 6 states and 937 transitions. [2023-11-12 02:03:23,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 365 flow [2023-11-12 02:03:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 338 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:03:23,146 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 225 flow [2023-11-12 02:03:23,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-12 02:03:23,147 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-12 02:03:23,147 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 225 flow [2023-11-12 02:03:23,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:23,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:23,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:03:23,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:23,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1696289582, now seen corresponding path program 1 times [2023-11-12 02:03:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:23,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779641277] [2023-11-12 02:03:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779641277] [2023-11-12 02:03:23,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779641277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120700111] [2023-11-12 02:03:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:23,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:23,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:23,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:23,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:03:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:23,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:03:23,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:24,162 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:03:24,163 INFO L351 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-12 02:03:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:24,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:24,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:03:24,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 78 [2023-11-12 02:03:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120700111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:25,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-11-12 02:03:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346674266] [2023-11-12 02:03:25,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:03:25,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:03:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:03:26,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 381 [2023-11-12 02:03:26,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 225 flow. Second operand has 21 states, 21 states have (on average 131.28571428571428) internal successors, (2757), 21 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:26,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:26,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 381 [2023-11-12 02:03:26,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:28,011 INFO L124 PetriNetUnfolderBase]: 210/397 cut-off events. [2023-11-12 02:03:28,011 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-12 02:03:28,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 397 events. 210/397 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1588 event pairs, 22 based on Foata normal form. 12/407 useless extension candidates. Maximal degree in co-relation 1029. Up to 141 conditions per place. [2023-11-12 02:03:28,017 INFO L140 encePairwiseOnDemand]: 371/381 looper letters, 62 selfloop transitions, 37 changer transitions 43/142 dead transitions. [2023-11-12 02:03:28,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 142 transitions, 965 flow [2023-11-12 02:03:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:03:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-12 02:03:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2972 transitions. [2023-11-12 02:03:28,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35456931519923646 [2023-11-12 02:03:28,034 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2972 transitions. [2023-11-12 02:03:28,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2972 transitions. [2023-11-12 02:03:28,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:28,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2972 transitions. [2023-11-12 02:03:28,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 135.0909090909091) internal successors, (2972), 22 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:28,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 381.0) internal successors, (8763), 23 states have internal predecessors, (8763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:28,068 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 381.0) internal successors, (8763), 23 states have internal predecessors, (8763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:28,068 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 225 flow. Second operand 22 states and 2972 transitions. [2023-11-12 02:03:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 142 transitions, 965 flow [2023-11-12 02:03:28,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 142 transitions, 913 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-12 02:03:28,080 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 446 flow [2023-11-12 02:03:28,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=446, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-12 02:03:28,084 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2023-11-12 02:03:28,085 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 446 flow [2023-11-12 02:03:28,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 131.28571428571428) internal successors, (2757), 21 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:28,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:28,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:28,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:28,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:28,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1924120698, now seen corresponding path program 1 times [2023-11-12 02:03:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234048253] [2023-11-12 02:03:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:28,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:28,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234048253] [2023-11-12 02:03:28,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234048253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:28,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311124733] [2023-11-12 02:03:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:28,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:28,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:28,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:03:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:28,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:03:28,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:29,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 66 treesize of output 58 [2023-11-12 02:03:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:29,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:29,580 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:03:29,581 INFO L351 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 19 treesize of output 7 [2023-11-12 02:03:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311124733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:29,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:29,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-11-12 02:03:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364167630] [2023-11-12 02:03:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:03:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:03:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:30,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 381 [2023-11-12 02:03:30,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 446 flow. Second operand has 12 states, 12 states have (on average 141.5) internal successors, (1698), 12 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:30,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:30,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 381 [2023-11-12 02:03:30,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:30,982 INFO L124 PetriNetUnfolderBase]: 235/436 cut-off events. [2023-11-12 02:03:30,984 INFO L125 PetriNetUnfolderBase]: For 1441/1441 co-relation queries the response was YES. [2023-11-12 02:03:30,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 436 events. 235/436 cut-off events. For 1441/1441 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1769 event pairs, 11 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 1936. Up to 141 conditions per place. [2023-11-12 02:03:30,992 INFO L140 encePairwiseOnDemand]: 370/381 looper letters, 70 selfloop transitions, 55 changer transitions 4/129 dead transitions. [2023-11-12 02:03:30,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 1104 flow [2023-11-12 02:03:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:03:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:03:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2048 transitions. [2023-11-12 02:03:31,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839520059992501 [2023-11-12 02:03:31,002 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2048 transitions. [2023-11-12 02:03:31,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2048 transitions. [2023-11-12 02:03:31,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:31,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2048 transitions. [2023-11-12 02:03:31,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.28571428571428) internal successors, (2048), 14 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:31,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:31,024 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 381.0) internal successors, (5715), 15 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:31,025 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 446 flow. Second operand 14 states and 2048 transitions. [2023-11-12 02:03:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 1104 flow [2023-11-12 02:03:31,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 996 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-11-12 02:03:31,040 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 715 flow [2023-11-12 02:03:31,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=715, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2023-11-12 02:03:31,043 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-11-12 02:03:31,044 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 715 flow [2023-11-12 02:03:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.5) internal successors, (1698), 12 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:31,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:31,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:31,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:03:31,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:31,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1677731548, now seen corresponding path program 2 times [2023-11-12 02:03:31,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:31,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897336491] [2023-11-12 02:03:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:31,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:31,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897336491] [2023-11-12 02:03:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897336491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60549346] [2023-11-12 02:03:31,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:03:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:31,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:31,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:03:31,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:03:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:31,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:03:31,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:31,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 66 treesize of output 58 [2023-11-12 02:03:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:32,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:32,349 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:03:32,352 INFO L351 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 19 treesize of output 7 [2023-11-12 02:03:32,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2023-11-12 02:03:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:32,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60549346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:32,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:32,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2023-11-12 02:03:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769104866] [2023-11-12 02:03:32,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:32,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:03:32,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:03:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:03:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 381 [2023-11-12 02:03:32,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 715 flow. Second operand has 13 states, 13 states have (on average 141.84615384615384) internal successors, (1844), 13 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:32,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:32,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 381 [2023-11-12 02:03:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:33,196 INFO L124 PetriNetUnfolderBase]: 235/435 cut-off events. [2023-11-12 02:03:33,197 INFO L125 PetriNetUnfolderBase]: For 1711/1711 co-relation queries the response was YES. [2023-11-12 02:03:33,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2130 conditions, 435 events. 235/435 cut-off events. For 1711/1711 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1753 event pairs, 41 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 1952. Up to 330 conditions per place. [2023-11-12 02:03:33,202 INFO L140 encePairwiseOnDemand]: 373/381 looper letters, 70 selfloop transitions, 28 changer transitions 4/102 dead transitions. [2023-11-12 02:03:33,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 1010 flow [2023-11-12 02:03:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:03:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:03:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1306 transitions. [2023-11-12 02:03:33,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38086905803441234 [2023-11-12 02:03:33,209 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1306 transitions. [2023-11-12 02:03:33,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1306 transitions. [2023-11-12 02:03:33,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:33,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1306 transitions. [2023-11-12 02:03:33,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.11111111111111) internal successors, (1306), 9 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:33,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 381.0) internal successors, (3810), 10 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:33,222 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 381.0) internal successors, (3810), 10 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:33,222 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 715 flow. Second operand 9 states and 1306 transitions. [2023-11-12 02:03:33,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 1010 flow [2023-11-12 02:03:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 102 transitions, 930 flow, removed 32 selfloop flow, removed 2 redundant places. [2023-11-12 02:03:33,239 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 719 flow [2023-11-12 02:03:33,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=719, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2023-11-12 02:03:33,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-11-12 02:03:33,240 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 719 flow [2023-11-12 02:03:33,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.84615384615384) internal successors, (1844), 13 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:33,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:33,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:33,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:03:33,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:33,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 388792646, now seen corresponding path program 3 times [2023-11-12 02:03:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:33,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130355056] [2023-11-12 02:03:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130355056] [2023-11-12 02:03:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130355056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55923687] [2023-11-12 02:03:33,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:03:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:33,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:03:34,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:03:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:34,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:03:34,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:34,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-11-12 02:03:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:34,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:34,335 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:03:34,335 INFO L351 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 115 treesize of output 107 [2023-11-12 02:03:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:34,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55923687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:34,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:34,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2023-11-12 02:03:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532428901] [2023-11-12 02:03:34,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:34,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:03:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:03:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:03:35,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 381 [2023-11-12 02:03:35,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 719 flow. Second operand has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:35,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:35,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 381 [2023-11-12 02:03:35,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:35,631 INFO L124 PetriNetUnfolderBase]: 247/462 cut-off events. [2023-11-12 02:03:35,632 INFO L125 PetriNetUnfolderBase]: For 1462/1462 co-relation queries the response was YES. [2023-11-12 02:03:35,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 462 events. 247/462 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1917 event pairs, 47 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 2056. Up to 342 conditions per place. [2023-11-12 02:03:35,638 INFO L140 encePairwiseOnDemand]: 371/381 looper letters, 75 selfloop transitions, 34 changer transitions 4/113 dead transitions. [2023-11-12 02:03:35,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 1069 flow [2023-11-12 02:03:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:03:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:03:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1734 transitions. [2023-11-12 02:03:35,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37926509186351703 [2023-11-12 02:03:35,646 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1734 transitions. [2023-11-12 02:03:35,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1734 transitions. [2023-11-12 02:03:35,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:35,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1734 transitions. [2023-11-12 02:03:35,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.5) internal successors, (1734), 12 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:35,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:35,673 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:35,681 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 719 flow. Second operand 12 states and 1734 transitions. [2023-11-12 02:03:35,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 1069 flow [2023-11-12 02:03:35,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 1017 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-12 02:03:35,696 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 806 flow [2023-11-12 02:03:35,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=806, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-11-12 02:03:35,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-12 02:03:35,697 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 806 flow [2023-11-12 02:03:35,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:35,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:35,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:35,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:35,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 700093096, now seen corresponding path program 4 times [2023-11-12 02:03:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824525143] [2023-11-12 02:03:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:36,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824525143] [2023-11-12 02:03:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824525143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072910446] [2023-11-12 02:03:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:03:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:36,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:03:36,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:03:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:36,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:03:36,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:36,630 INFO L351 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 26 treesize of output 24 [2023-11-12 02:03:36,743 INFO L351 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 [2023-11-12 02:03:36,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-11-12 02:03:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:36,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:37,157 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:03:37,157 INFO L351 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 46 treesize of output 30 [2023-11-12 02:03:37,161 INFO L351 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 13 treesize of output 7 [2023-11-12 02:03:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:37,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072910446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:37,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:37,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:03:37,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895020972] [2023-11-12 02:03:37,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:37,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:03:37,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:03:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:03:38,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 381 [2023-11-12 02:03:38,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 806 flow. Second operand has 21 states, 21 states have (on average 136.9047619047619) internal successors, (2875), 21 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:38,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:38,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 381 [2023-11-12 02:03:38,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:40,819 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] [2023-11-12 02:03:41,919 INFO L124 PetriNetUnfolderBase]: 335/617 cut-off events. [2023-11-12 02:03:41,919 INFO L125 PetriNetUnfolderBase]: For 2117/2117 co-relation queries the response was YES. [2023-11-12 02:03:41,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2899 conditions, 617 events. 335/617 cut-off events. For 2117/2117 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2795 event pairs, 7 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 2819. Up to 145 conditions per place. [2023-11-12 02:03:41,927 INFO L140 encePairwiseOnDemand]: 370/381 looper letters, 81 selfloop transitions, 79 changer transitions 8/168 dead transitions. [2023-11-12 02:03:41,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 168 transitions, 1599 flow [2023-11-12 02:03:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:03:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:03:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2414 transitions. [2023-11-12 02:03:41,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37270341207349084 [2023-11-12 02:03:41,938 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2414 transitions. [2023-11-12 02:03:41,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2414 transitions. [2023-11-12 02:03:41,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:41,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2414 transitions. [2023-11-12 02:03:41,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:41,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 381.0) internal successors, (6858), 18 states have internal predecessors, (6858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:41,961 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 381.0) internal successors, (6858), 18 states have internal predecessors, (6858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:41,961 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 806 flow. Second operand 17 states and 2414 transitions. [2023-11-12 02:03:41,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 168 transitions, 1599 flow [2023-11-12 02:03:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 168 transitions, 1531 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-12 02:03:41,983 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 1203 flow [2023-11-12 02:03:41,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1203, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2023-11-12 02:03:41,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-11-12 02:03:41,985 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 1203 flow [2023-11-12 02:03:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 136.9047619047619) internal successors, (2875), 21 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:41,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:41,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:41,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:42,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:42,193 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:42,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash 756025650, now seen corresponding path program 2 times [2023-11-12 02:03:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:42,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235005732] [2023-11-12 02:03:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:42,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:42,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235005732] [2023-11-12 02:03:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235005732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616575361] [2023-11-12 02:03:42,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:03:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:42,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:42,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:03:42,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:03:42,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:42,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:03:42,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:42,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616575361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:42,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:03:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959269833] [2023-11-12 02:03:42,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:03:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:03:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:43,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 381 [2023-11-12 02:03:43,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 1203 flow. Second operand has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:43,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:43,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 381 [2023-11-12 02:03:43,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:44,046 INFO L124 PetriNetUnfolderBase]: 502/915 cut-off events. [2023-11-12 02:03:44,046 INFO L125 PetriNetUnfolderBase]: For 5159/5159 co-relation queries the response was YES. [2023-11-12 02:03:44,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5001 conditions, 915 events. 502/915 cut-off events. For 5159/5159 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4537 event pairs, 98 based on Foata normal form. 14/929 useless extension candidates. Maximal degree in co-relation 4890. Up to 337 conditions per place. [2023-11-12 02:03:44,059 INFO L140 encePairwiseOnDemand]: 375/381 looper letters, 132 selfloop transitions, 89 changer transitions 1/222 dead transitions. [2023-11-12 02:03:44,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 222 transitions, 2601 flow [2023-11-12 02:03:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:03:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:03:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2534 transitions. [2023-11-12 02:03:44,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41568241469816275 [2023-11-12 02:03:44,073 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2534 transitions. [2023-11-12 02:03:44,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2534 transitions. [2023-11-12 02:03:44,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:44,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2534 transitions. [2023-11-12 02:03:44,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 158.375) internal successors, (2534), 16 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:44,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 381.0) internal successors, (6477), 17 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:44,098 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 381.0) internal successors, (6477), 17 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:44,098 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 1203 flow. Second operand 16 states and 2534 transitions. [2023-11-12 02:03:44,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 222 transitions, 2601 flow [2023-11-12 02:03:44,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 222 transitions, 2524 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-11-12 02:03:44,147 INFO L231 Difference]: Finished difference. Result has 124 places, 157 transitions, 2091 flow [2023-11-12 02:03:44,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2091, PETRI_PLACES=124, PETRI_TRANSITIONS=157} [2023-11-12 02:03:44,149 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2023-11-12 02:03:44,149 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 157 transitions, 2091 flow [2023-11-12 02:03:44,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:44,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:44,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:44,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:44,356 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:44,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1391722860, now seen corresponding path program 3 times [2023-11-12 02:03:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:44,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956153779] [2023-11-12 02:03:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:44,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:44,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956153779] [2023-11-12 02:03:44,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956153779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:44,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663484798] [2023-11-12 02:03:44,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:03:44,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:44,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:44,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:44,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:03:45,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:03:45,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:45,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:03:45,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:45,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:45,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663484798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:45,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:45,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:03:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46641605] [2023-11-12 02:03:45,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:03:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:03:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:45,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 381 [2023-11-12 02:03:45,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 157 transitions, 2091 flow. Second operand has 12 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:45,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:45,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 381 [2023-11-12 02:03:45,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:46,706 INFO L124 PetriNetUnfolderBase]: 516/947 cut-off events. [2023-11-12 02:03:46,706 INFO L125 PetriNetUnfolderBase]: For 8380/8380 co-relation queries the response was YES. [2023-11-12 02:03:46,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5998 conditions, 947 events. 516/947 cut-off events. For 8380/8380 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4736 event pairs, 98 based on Foata normal form. 28/974 useless extension candidates. Maximal degree in co-relation 5903. Up to 341 conditions per place. [2023-11-12 02:03:46,723 INFO L140 encePairwiseOnDemand]: 375/381 looper letters, 133 selfloop transitions, 95 changer transitions 1/229 dead transitions. [2023-11-12 02:03:46,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 229 transitions, 3014 flow [2023-11-12 02:03:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:03:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:03:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2685 transitions. [2023-11-12 02:03:46,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145437702640111 [2023-11-12 02:03:46,731 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2685 transitions. [2023-11-12 02:03:46,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2685 transitions. [2023-11-12 02:03:46,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:46,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2685 transitions. [2023-11-12 02:03:46,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 157.94117647058823) internal successors, (2685), 17 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:46,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 381.0) internal successors, (6858), 18 states have internal predecessors, (6858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:46,749 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 381.0) internal successors, (6858), 18 states have internal predecessors, (6858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:46,749 INFO L175 Difference]: Start difference. First operand has 124 places, 157 transitions, 2091 flow. Second operand 17 states and 2685 transitions. [2023-11-12 02:03:46,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 229 transitions, 3014 flow [2023-11-12 02:03:46,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 229 transitions, 2844 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-11-12 02:03:46,814 INFO L231 Difference]: Finished difference. Result has 143 places, 168 transitions, 2302 flow [2023-11-12 02:03:46,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2302, PETRI_PLACES=143, PETRI_TRANSITIONS=168} [2023-11-12 02:03:46,815 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-11-12 02:03:46,815 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 168 transitions, 2302 flow [2023-11-12 02:03:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:46,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:46,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:46,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:03:47,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1516814598, now seen corresponding path program 1 times [2023-11-12 02:03:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343094707] [2023-11-12 02:03:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:47,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:47,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343094707] [2023-11-12 02:03:47,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343094707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:47,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014566912] [2023-11-12 02:03:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:47,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:47,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:47,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:03:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:47,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:03:47,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:47,886 INFO L322 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-11-12 02:03:47,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 95 [2023-11-12 02:03:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:47,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:48,313 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:03:48,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 105 [2023-11-12 02:03:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014566912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:48,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2023-11-12 02:03:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042994003] [2023-11-12 02:03:48,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:03:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:03:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:03:50,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 381 [2023-11-12 02:03:50,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 168 transitions, 2302 flow. Second operand has 19 states, 19 states have (on average 133.68421052631578) internal successors, (2540), 19 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:50,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:50,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 381 [2023-11-12 02:03:50,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:52,277 INFO L124 PetriNetUnfolderBase]: 695/1365 cut-off events. [2023-11-12 02:03:52,277 INFO L125 PetriNetUnfolderBase]: For 13826/13826 co-relation queries the response was YES. [2023-11-12 02:03:52,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8525 conditions, 1365 events. 695/1365 cut-off events. For 13826/13826 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8204 event pairs, 77 based on Foata normal form. 85/1449 useless extension candidates. Maximal degree in co-relation 8404. Up to 341 conditions per place. [2023-11-12 02:03:52,297 INFO L140 encePairwiseOnDemand]: 370/381 looper letters, 160 selfloop transitions, 87 changer transitions 96/343 dead transitions. [2023-11-12 02:03:52,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 343 transitions, 4730 flow [2023-11-12 02:03:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:03:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-12 02:03:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3443 transitions. [2023-11-12 02:03:52,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36146981627296587 [2023-11-12 02:03:52,305 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3443 transitions. [2023-11-12 02:03:52,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3443 transitions. [2023-11-12 02:03:52,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:52,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3443 transitions. [2023-11-12 02:03:52,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.72) internal successors, (3443), 25 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:52,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 381.0) internal successors, (9906), 26 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:52,328 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 381.0) internal successors, (9906), 26 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:52,328 INFO L175 Difference]: Start difference. First operand has 143 places, 168 transitions, 2302 flow. Second operand 25 states and 3443 transitions. [2023-11-12 02:03:52,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 343 transitions, 4730 flow [2023-11-12 02:03:52,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 343 transitions, 4528 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-11-12 02:03:52,433 INFO L231 Difference]: Finished difference. Result has 173 places, 185 transitions, 2772 flow [2023-11-12 02:03:52,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2772, PETRI_PLACES=173, PETRI_TRANSITIONS=185} [2023-11-12 02:03:52,435 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2023-11-12 02:03:52,435 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 185 transitions, 2772 flow [2023-11-12 02:03:52,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.68421052631578) internal successors, (2540), 19 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:52,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:52,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:52,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:52,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:03:52,642 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:52,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1434376286, now seen corresponding path program 5 times [2023-11-12 02:03:52,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:52,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774323540] [2023-11-12 02:03:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:52,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:52,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774323540] [2023-11-12 02:03:52,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774323540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:52,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186278360] [2023-11-12 02:03:52,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:03:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:52,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:52,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:53,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:03:53,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:03:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:53,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:03:53,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:53,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:53,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186278360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:53,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:03:53,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-12 02:03:53,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982423852] [2023-11-12 02:03:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:03:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:03:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:03:53,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 381 [2023-11-12 02:03:53,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 185 transitions, 2772 flow. Second operand has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:53,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:53,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 381 [2023-11-12 02:03:53,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:03:53,804 INFO L124 PetriNetUnfolderBase]: 588/1167 cut-off events. [2023-11-12 02:03:53,804 INFO L125 PetriNetUnfolderBase]: For 15041/15041 co-relation queries the response was YES. [2023-11-12 02:03:53,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8100 conditions, 1167 events. 588/1167 cut-off events. For 15041/15041 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6752 event pairs, 130 based on Foata normal form. 22/1188 useless extension candidates. Maximal degree in co-relation 7962. Up to 630 conditions per place. [2023-11-12 02:03:53,825 INFO L140 encePairwiseOnDemand]: 377/381 looper letters, 160 selfloop transitions, 31 changer transitions 11/202 dead transitions. [2023-11-12 02:03:53,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 202 transitions, 3294 flow [2023-11-12 02:03:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:03:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:03:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 808 transitions. [2023-11-12 02:03:53,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241469816272966 [2023-11-12 02:03:53,828 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 808 transitions. [2023-11-12 02:03:53,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 808 transitions. [2023-11-12 02:03:53,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:03:53,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 808 transitions. [2023-11-12 02:03:53,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:53,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:53,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:53,833 INFO L175 Difference]: Start difference. First operand has 173 places, 185 transitions, 2772 flow. Second operand 5 states and 808 transitions. [2023-11-12 02:03:53,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 202 transitions, 3294 flow [2023-11-12 02:03:53,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 202 transitions, 3016 flow, removed 99 selfloop flow, removed 13 redundant places. [2023-11-12 02:03:53,944 INFO L231 Difference]: Finished difference. Result has 158 places, 172 transitions, 2390 flow [2023-11-12 02:03:53,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2390, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2023-11-12 02:03:53,945 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-11-12 02:03:53,945 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 2390 flow [2023-11-12 02:03:53,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:53,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:03:53,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:53,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:03:54,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:03:54,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1430903916, now seen corresponding path program 4 times [2023-11-12 02:03:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:54,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644358598] [2023-11-12 02:03:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:54,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:54,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644358598] [2023-11-12 02:03:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644358598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510127880] [2023-11-12 02:03:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:03:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:54,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:54,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027b2e2b-deb5-45bb-aa54-dc3fc1bf0071/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:03:54,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:03:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:03:54,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:03:54,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:54,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:03:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510127880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:03:54,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:03:54,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:03:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094852612] [2023-11-12 02:03:54,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:03:54,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:03:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:03:55,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 381 [2023-11-12 02:03:55,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 2390 flow. Second operand has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:55,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:03:55,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 381 [2023-11-12 02:03:55,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand