./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:33:37,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:33:37,254 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:33:37,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:33:37,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:33:37,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:33:37,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:33:37,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:33:37,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:33:37,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:33:37,320 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:33:37,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:33:37,321 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:33:37,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:33:37,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:33:37,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:33:37,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:33:37,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:33:37,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:33:37,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:33:37,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:33:37,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:33:37,328 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:33:37,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:33:37,329 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:33:37,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:33:37,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:33:37,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:33:37,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:37,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:33:37,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:33:37,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:33:37,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:33:37,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:33:37,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:33:37,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:33:37,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:33:37,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:33:37,335 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:33:37,336 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_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2023-11-19 07:33:37,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:33:37,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:33:37,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:33:37,694 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:33:37,695 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:33:37,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-19 07:33:40,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:33:41,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:33:41,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-19 07:33:41,232 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/data/25b001031/fb82d4c345e64e65ac810cfcd6c5b0b5/FLAG032ffafe2 [2023-11-19 07:33:41,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/data/25b001031/fb82d4c345e64e65ac810cfcd6c5b0b5 [2023-11-19 07:33:41,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:33:41,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:33:41,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:41,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:33:41,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:33:41,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38efe612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41, skipping insertion in model container [2023-11-19 07:33:41,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,297 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:33:41,530 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_24d74439-ddd7-4f99-a0cd-51638bda85c3/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-19 07:33:41,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:41,554 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:33:41,584 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_24d74439-ddd7-4f99-a0cd-51638bda85c3/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-19 07:33:41,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:41,615 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:33:41,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41 WrapperNode [2023-11-19 07:33:41,616 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:41,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:41,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:33:41,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:33:41,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,674 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 283 [2023-11-19 07:33:41,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:41,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:33:41,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:33:41,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:33:41,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,713 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:33:41,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:33:41,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:33:41,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:33:41,723 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (1/1) ... [2023-11-19 07:33:41,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:41,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:41,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:33:41,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:33:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:33:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:33:41,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:33:41,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:33:41,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:33:41,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:33:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:33:41,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:33:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:33:41,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:33:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:33:41,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:33:41,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:33:41,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:33:41,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:33:41,836 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:33:42,029 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:33:42,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:33:42,687 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:33:42,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:33:42,706 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:33:42,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:42 BoogieIcfgContainer [2023-11-19 07:33:42,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:33:42,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:33:42,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:33:42,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:33:42,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:33:41" (1/3) ... [2023-11-19 07:33:42,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1d53e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:42, skipping insertion in model container [2023-11-19 07:33:42,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:41" (2/3) ... [2023-11-19 07:33:42,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1d53e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:42, skipping insertion in model container [2023-11-19 07:33:42,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:42" (3/3) ... [2023-11-19 07:33:42,724 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-19 07:33:42,733 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:33:42,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:33:42,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:33:42,742 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:33:42,914 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:33:42,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 377 transitions, 775 flow [2023-11-19 07:33:43,228 INFO L124 PetriNetUnfolderBase]: 29/374 cut-off events. [2023-11-19 07:33:43,230 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:33:43,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 374 events. 29/374 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 533 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 246. Up to 2 conditions per place. [2023-11-19 07:33:43,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 377 transitions, 775 flow [2023-11-19 07:33:43,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 363 transitions, 744 flow [2023-11-19 07:33:43,267 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:43,278 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 363 transitions, 744 flow [2023-11-19 07:33:43,281 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 363 transitions, 744 flow [2023-11-19 07:33:43,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 363 transitions, 744 flow [2023-11-19 07:33:43,375 INFO L124 PetriNetUnfolderBase]: 29/363 cut-off events. [2023-11-19 07:33:43,375 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:33:43,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 363 events. 29/363 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 530 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 246. Up to 2 conditions per place. [2023-11-19 07:33:43,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 18862 [2023-11-19 07:33:56,704 INFO L134 LiptonReduction]: Checked pairs total: 16659 [2023-11-19 07:33:56,705 INFO L136 LiptonReduction]: Total number of compositions: 426 [2023-11-19 07:33:56,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:56,728 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;@416e0082, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:56,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:33:56,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:56,740 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-19 07:33:56,740 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:33:56,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:56,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:33:56,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1430996849, now seen corresponding path program 1 times [2023-11-19 07:33:56,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:56,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473379561] [2023-11-19 07:33:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:57,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473379561] [2023-11-19 07:33:57,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473379561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:57,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:57,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383985460] [2023-11-19 07:33:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:57,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:57,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 803 [2023-11-19 07:33:57,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:57,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:57,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 803 [2023-11-19 07:33:57,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:57,821 INFO L124 PetriNetUnfolderBase]: 431/636 cut-off events. [2023-11-19 07:33:57,822 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-19 07:33:57,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 636 events. 431/636 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2005 event pairs, 138 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-19 07:33:57,830 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 42 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2023-11-19 07:33:57,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 221 flow [2023-11-19 07:33:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-11-19 07:33:57,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44831880448318806 [2023-11-19 07:33:57,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-11-19 07:33:57,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-11-19 07:33:57,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:57,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-11-19 07:33:57,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:57,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 803.0) internal successors, (3212), 4 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:57,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 803.0) internal successors, (3212), 4 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:57,900 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 1080 transitions. [2023-11-19 07:33:57,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 221 flow [2023-11-19 07:33:57,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:33:57,913 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 88 flow [2023-11-19 07:33:57,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-11-19 07:33:57,919 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-19 07:33:57,920 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 88 flow [2023-11-19 07:33:57,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:57,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:57,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:57,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:33:57,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:33:57,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2088282306, now seen corresponding path program 1 times [2023-11-19 07:33:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261840331] [2023-11-19 07:33:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:58,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261840331] [2023-11-19 07:33:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261840331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:58,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:33:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787716877] [2023-11-19 07:33:58,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:58,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:58,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:58,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-19 07:33:58,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:58,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:58,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-19 07:33:58,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:58,679 INFO L124 PetriNetUnfolderBase]: 793/1193 cut-off events. [2023-11-19 07:33:58,680 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-19 07:33:58,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 1193 events. 793/1193 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4338 event pairs, 457 based on Foata normal form. 46/1229 useless extension candidates. Maximal degree in co-relation 1030. Up to 637 conditions per place. [2023-11-19 07:33:58,688 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 65 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2023-11-19 07:33:58,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 80 transitions, 376 flow [2023-11-19 07:33:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:33:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:33:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2012 transitions. [2023-11-19 07:33:58,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41760066417600666 [2023-11-19 07:33:58,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2012 transitions. [2023-11-19 07:33:58,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2012 transitions. [2023-11-19 07:33:58,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:58,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2012 transitions. [2023-11-19 07:33:58,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.3333333333333) internal successors, (2012), 6 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:58,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:58,721 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:58,721 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 88 flow. Second operand 6 states and 2012 transitions. [2023-11-19 07:33:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 80 transitions, 376 flow [2023-11-19 07:33:58,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:58,725 INFO L231 Difference]: Finished difference. Result has 37 places, 44 transitions, 188 flow [2023-11-19 07:33:58,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=37, PETRI_TRANSITIONS=44} [2023-11-19 07:33:58,726 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-11-19 07:33:58,726 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 44 transitions, 188 flow [2023-11-19 07:33:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:58,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:58,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:58,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:33:58,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:33:58,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:58,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1348495208, now seen corresponding path program 1 times [2023-11-19 07:33:58,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:58,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20214387] [2023-11-19 07:33:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:58,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:58,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:58,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20214387] [2023-11-19 07:33:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20214387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:58,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:58,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:33:58,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280347989] [2023-11-19 07:33:58,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:58,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:58,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:58,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:59,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-19 07:33:59,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 44 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:59,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-19 07:33:59,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:59,418 INFO L124 PetriNetUnfolderBase]: 691/1061 cut-off events. [2023-11-19 07:33:59,419 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2023-11-19 07:33:59,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 1061 events. 691/1061 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3810 event pairs, 417 based on Foata normal form. 46/1104 useless extension candidates. Maximal degree in co-relation 1604. Up to 637 conditions per place. [2023-11-19 07:33:59,426 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 61 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2023-11-19 07:33:59,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 442 flow [2023-11-19 07:33:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:33:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:33:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2010 transitions. [2023-11-19 07:33:59,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41718555417185554 [2023-11-19 07:33:59,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2010 transitions. [2023-11-19 07:33:59,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2010 transitions. [2023-11-19 07:33:59,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:59,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2010 transitions. [2023-11-19 07:33:59,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,458 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,459 INFO L175 Difference]: Start difference. First operand has 37 places, 44 transitions, 188 flow. Second operand 6 states and 2010 transitions. [2023-11-19 07:33:59,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 442 flow [2023-11-19 07:33:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:33:59,466 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 239 flow [2023-11-19 07:33:59,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-11-19 07:33:59,468 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-11-19 07:33:59,471 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 239 flow [2023-11-19 07:33:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:59,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:59,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:33:59,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:33:59,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash 361837902, now seen corresponding path program 1 times [2023-11-19 07:33:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:59,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969839633] [2023-11-19 07:33:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:59,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:59,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969839633] [2023-11-19 07:33:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969839633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:59,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:59,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:33:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720251079] [2023-11-19 07:33:59,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:59,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:59,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-19 07:33:59,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 239 flow. Second operand has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:59,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:59,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-19 07:33:59,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:00,023 INFO L124 PetriNetUnfolderBase]: 575/891 cut-off events. [2023-11-19 07:34:00,023 INFO L125 PetriNetUnfolderBase]: For 870/870 co-relation queries the response was YES. [2023-11-19 07:34:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 891 events. 575/891 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3069 event pairs, 369 based on Foata normal form. 26/914 useless extension candidates. Maximal degree in co-relation 1780. Up to 637 conditions per place. [2023-11-19 07:34:00,030 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 28 selfloop transitions, 6 changer transitions 37/71 dead transitions. [2023-11-19 07:34:00,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 467 flow [2023-11-19 07:34:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:34:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:34:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2007 transitions. [2023-11-19 07:34:00,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165628891656289 [2023-11-19 07:34:00,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2007 transitions. [2023-11-19 07:34:00,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2007 transitions. [2023-11-19 07:34:00,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:00,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2007 transitions. [2023-11-19 07:34:00,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 334.5) internal successors, (2007), 6 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 803.0) internal successors, (5621), 7 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,065 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 239 flow. Second operand 6 states and 2007 transitions. [2023-11-19 07:34:00,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 467 flow [2023-11-19 07:34:00,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 446 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:00,071 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 156 flow [2023-11-19 07:34:00,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-11-19 07:34:00,072 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-19 07:34:00,072 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 156 flow [2023-11-19 07:34:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.6) internal successors, (1638), 5 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:00,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:00,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:34:00,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:34:00,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1689235102, now seen corresponding path program 1 times [2023-11-19 07:34:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:00,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427308178] [2023-11-19 07:34:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:00,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427308178] [2023-11-19 07:34:00,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427308178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:00,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377985716] [2023-11-19 07:34:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:00,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:00,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:00,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:00,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:00,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:00,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377985716] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:00,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:34:00,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 07:34:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396875392] [2023-11-19 07:34:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:00,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:34:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:34:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:00,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-19 07:34:00,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:00,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-19 07:34:00,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:00,885 INFO L124 PetriNetUnfolderBase]: 416/613 cut-off events. [2023-11-19 07:34:00,885 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-19 07:34:00,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 613 events. 416/613 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1878 event pairs, 166 based on Foata normal form. 56/668 useless extension candidates. Maximal degree in co-relation 1855. Up to 427 conditions per place. [2023-11-19 07:34:00,892 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-19 07:34:00,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 308 flow [2023-11-19 07:34:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:34:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-19 07:34:00,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-19 07:34:00,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-19 07:34:00,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-19 07:34:00,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:00,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-19 07:34:00,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,916 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,916 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 156 flow. Second operand 5 states and 1622 transitions. [2023-11-19 07:34:00,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 308 flow [2023-11-19 07:34:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 244 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-11-19 07:34:00,923 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 129 flow [2023-11-19 07:34:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-19 07:34:00,924 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-19 07:34:00,924 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 129 flow [2023-11-19 07:34:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:00,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:00,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:00,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:34:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:01,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:34:01,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2048330752, now seen corresponding path program 1 times [2023-11-19 07:34:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926031004] [2023-11-19 07:34:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926031004] [2023-11-19 07:34:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926031004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118598270] [2023-11-19 07:34:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:01,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:01,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:01,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:01,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:01,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:01,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118598270] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:01,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:34:01,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 07:34:01,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228573474] [2023-11-19 07:34:01,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:34:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:34:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:01,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-19 07:34:01,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:01,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:01,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-19 07:34:01,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:01,848 INFO L124 PetriNetUnfolderBase]: 410/601 cut-off events. [2023-11-19 07:34:01,848 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-11-19 07:34:01,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 601 events. 410/601 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1811 event pairs, 183 based on Foata normal form. 42/640 useless extension candidates. Maximal degree in co-relation 1627. Up to 460 conditions per place. [2023-11-19 07:34:01,854 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 45 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-19 07:34:01,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 286 flow [2023-11-19 07:34:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:34:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-19 07:34:01,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-19 07:34:01,863 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-19 07:34:01,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-19 07:34:01,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:01,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-19 07:34:01,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:01,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:01,882 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:01,883 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 129 flow. Second operand 5 states and 1622 transitions. [2023-11-19 07:34:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 286 flow [2023-11-19 07:34:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 268 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:01,886 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 139 flow [2023-11-19 07:34:01,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-19 07:34:01,887 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-19 07:34:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 139 flow [2023-11-19 07:34:01,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:01,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:01,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:01,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:34:02,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:34:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1056169113, now seen corresponding path program 1 times [2023-11-19 07:34:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938320307] [2023-11-19 07:34:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:34:02,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:02,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938320307] [2023-11-19 07:34:02,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938320307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:02,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282798624] [2023-11-19 07:34:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:02,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:02,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:02,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:02,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:02,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:34:02,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:34:02,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282798624] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:02,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:34:02,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 07:34:02,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929644389] [2023-11-19 07:34:02,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:02,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:34:02,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:34:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:02,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-19 07:34:02,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:02,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-19 07:34:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:02,948 INFO L124 PetriNetUnfolderBase]: 468/685 cut-off events. [2023-11-19 07:34:02,948 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-11-19 07:34:02,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 685 events. 468/685 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2060 event pairs, 221 based on Foata normal form. 42/724 useless extension candidates. Maximal degree in co-relation 1989. Up to 544 conditions per place. [2023-11-19 07:34:02,954 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 47 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-19 07:34:02,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 310 flow [2023-11-19 07:34:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:34:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-19 07:34:02,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-19 07:34:02,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-19 07:34:02,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-19 07:34:02,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:02,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-19 07:34:02,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:02,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:02,978 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 803.0) internal successors, (4818), 6 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:02,979 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 139 flow. Second operand 5 states and 1622 transitions. [2023-11-19 07:34:02,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 310 flow [2023-11-19 07:34:02,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:02,982 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 149 flow [2023-11-19 07:34:02,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-19 07:34:02,984 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-11-19 07:34:02,984 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 149 flow [2023-11-19 07:34:02,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:02,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:02,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:03,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:03,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:34:03,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 41454504, now seen corresponding path program 1 times [2023-11-19 07:34:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378760281] [2023-11-19 07:34:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378760281] [2023-11-19 07:34:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378760281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:04,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261771105] [2023-11-19 07:34:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:04,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:04,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:05,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 07:34:05,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:05,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:34:05,187 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:34:05,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:34:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:05,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:34:05,627 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2023-11-19 07:34:05,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-19 07:34:05,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-19 07:34:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:05,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:07,837 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 .cse1 c_~csum~0) (+ (select (select (store |c_#memory_int| c_~C~0.base (store (select |c_#memory_int| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset)) c_~asum~0 c_~bsum~0))))) is different from false [2023-11-19 07:34:09,870 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select |c_#memory_int| c_~B~0.base) ~B~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int| c_~C~0.base (store (select |c_#memory_int| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse0 .cse1 c_~csum~0)))) is different from false [2023-11-19 07:34:09,905 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (v_ArrVal_272 (Array Int Int)) (~B~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_272))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) ~B~0.offset))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))))))) is different from false [2023-11-19 07:34:09,925 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (v_ArrVal_272 (Array Int Int)) (~B~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_272))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) ~B~0.offset))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) ~B~0.offset)))))) is different from false [2023-11-19 07:34:10,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:10,033 INFO L378 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1922 treesize of output 1694 [2023-11-19 07:34:10,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:10,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 542 [2023-11-19 07:34:15,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-11-19 07:34:15,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:15,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-19 07:34:15,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:15,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 105 [2023-11-19 07:34:15,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:15,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-11-19 07:34:15,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:15,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 141 [2023-11-19 07:34:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:15,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:34:15,643 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:15,649 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:15,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:15,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 164 [2023-11-19 07:34:16,153 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:16,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:16,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 124 [2023-11-19 07:34:16,290 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:16,301 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:16,308 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-19 07:34:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:16,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:34:16,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:16,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 35 [2023-11-19 07:34:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-19 07:34:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261771105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:16,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:16,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-19 07:34:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284797937] [2023-11-19 07:34:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:34:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:34:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=725, Unknown=4, NotChecked=228, Total=1056 [2023-11-19 07:34:17,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 803 [2023-11-19 07:34:17,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 149 flow. Second operand has 33 states, 33 states have (on average 270.06060606060606) internal successors, (8912), 33 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:17,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:17,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 803 [2023-11-19 07:34:17,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:19,545 INFO L124 PetriNetUnfolderBase]: 682/998 cut-off events. [2023-11-19 07:34:19,545 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2023-11-19 07:34:19,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 998 events. 682/998 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3420 event pairs, 53 based on Foata normal form. 1/996 useless extension candidates. Maximal degree in co-relation 3103. Up to 731 conditions per place. [2023-11-19 07:34:19,556 INFO L140 encePairwiseOnDemand]: 791/803 looper letters, 75 selfloop transitions, 28 changer transitions 1/104 dead transitions. [2023-11-19 07:34:19,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 104 transitions, 603 flow [2023-11-19 07:34:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:34:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:34:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3315 transitions. [2023-11-19 07:34:19,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34402241594022415 [2023-11-19 07:34:19,573 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3315 transitions. [2023-11-19 07:34:19,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3315 transitions. [2023-11-19 07:34:19,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:19,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3315 transitions. [2023-11-19 07:34:19,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 276.25) internal successors, (3315), 12 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:19,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 803.0) internal successors, (10439), 13 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:19,606 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 803.0) internal successors, (10439), 13 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:19,606 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 149 flow. Second operand 12 states and 3315 transitions. [2023-11-19 07:34:19,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 104 transitions, 603 flow [2023-11-19 07:34:19,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 104 transitions, 576 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:19,611 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 331 flow [2023-11-19 07:34:19,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=803, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=331, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-11-19 07:34:19,616 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-11-19 07:34:19,616 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 331 flow [2023-11-19 07:34:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 270.06060606060606) internal successors, (8912), 33 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:19,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:19,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:19,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:34:19,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:34:19,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2123952584, now seen corresponding path program 2 times [2023-11-19 07:34:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:19,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842412884] [2023-11-19 07:34:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:22,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:22,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842412884] [2023-11-19 07:34:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842412884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:22,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808949009] [2023-11-19 07:34:22,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:34:22,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:22,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:22,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d74439-ddd7-4f99-a0cd-51638bda85c3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:22,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:34:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:22,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:34:22,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:23,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:23,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-19 07:34:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:34:23,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:23,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:23,700 INFO L378 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95