./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:57,714 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:57,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:57,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:57,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:57,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:57,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:57,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:57,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:57,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:57,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:57,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:57,894 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:57,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:57,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:57,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:57,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:57,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:57,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:57,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:57,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:57,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:57,905 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:57,906 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:57,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:57,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:57,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:57,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:57,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:57,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:57,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:57,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:57,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:57,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:57,912 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:57,913 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:57,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:57,913 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:57,914 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:57,914 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_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2023-11-12 02:21:58,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:58,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:58,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:58,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:58,243 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:58,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-12 02:22:01,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:01,639 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:01,640 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-12 02:22:01,650 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/data/5e5058c13/bc4e7147f28346749485f52c89535cdd/FLAG8b9744202 [2023-11-12 02:22:01,663 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/data/5e5058c13/bc4e7147f28346749485f52c89535cdd [2023-11-12 02:22:01,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:01,668 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:01,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:01,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:01,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:01,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef17d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01, skipping insertion in model container [2023-11-12 02:22:01,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,718 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:01,906 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_fc06862b-4940-49cc-b5fb-2d031f926845/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-12 02:22:01,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:01,941 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:01,975 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_fc06862b-4940-49cc-b5fb-2d031f926845/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-12 02:22:01,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:01,995 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:22:01,995 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:22:02,002 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:02,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02 WrapperNode [2023-11-12 02:22:02,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:02,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:02,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:02,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:02,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,068 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 331 [2023-11-12 02:22:02,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:02,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:02,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:02,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:02,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:02,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:02,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:02,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:02,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (1/1) ... [2023-11-12 02:22:02,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:02,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:02,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:22:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:22:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:22:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:22:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:22:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:22:02,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:22:02,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:22:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:22:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:22:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:22:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:02,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:22:02,231 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:22:02,402 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:02,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:02,953 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:03,214 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:03,214 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:22:03,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:03 BoogieIcfgContainer [2023-11-12 02:22:03,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:03,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:03,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:03,224 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:03,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:01" (1/3) ... [2023-11-12 02:22:03,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c26dfdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:03, skipping insertion in model container [2023-11-12 02:22:03,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:02" (2/3) ... [2023-11-12 02:22:03,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c26dfdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:03, skipping insertion in model container [2023-11-12 02:22:03,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:03" (3/3) ... [2023-11-12 02:22:03,227 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-11-12 02:22:03,237 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:22:03,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:03,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:03,247 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:22:03,369 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:22:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 544 flow [2023-11-12 02:22:03,627 INFO L124 PetriNetUnfolderBase]: 19/254 cut-off events. [2023-11-12 02:22:03,627 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:22:03,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-12 02:22:03,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 544 flow [2023-11-12 02:22:03,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 241 transitions, 506 flow [2023-11-12 02:22:03,665 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:22:03,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-12 02:22:03,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-12 02:22:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 241 transitions, 506 flow [2023-11-12 02:22:03,744 INFO L124 PetriNetUnfolderBase]: 19/241 cut-off events. [2023-11-12 02:22:03,744 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:22:03,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-12 02:22:03,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-12 02:22:15,713 INFO L134 LiptonReduction]: Checked pairs total: 3215 [2023-11-12 02:22:15,714 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-11-12 02:22:15,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:15,737 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;@1868bc50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:15,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:22:15,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:22:15,747 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-12 02:22:15,747 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:22:15,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:15,748 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] [2023-11-12 02:22:15,748 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 2 more)] === [2023-11-12 02:22:15,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1474123186, now seen corresponding path program 1 times [2023-11-12 02:22:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515633956] [2023-11-12 02:22:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:16,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:16,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515633956] [2023-11-12 02:22:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515633956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:16,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:16,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:16,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124507676] [2023-11-12 02:22:16,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:16,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:16,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 509 [2023-11-12 02:22:16,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:16,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:16,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 509 [2023-11-12 02:22:16,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:17,310 INFO L124 PetriNetUnfolderBase]: 1799/2452 cut-off events. [2023-11-12 02:22:17,310 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-12 02:22:17,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 2452 events. 1799/2452 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9502 event pairs, 199 based on Foata normal form. 0/1840 useless extension candidates. Maximal degree in co-relation 4806. Up to 1553 conditions per place. [2023-11-12 02:22:17,346 INFO L140 encePairwiseOnDemand]: 504/509 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-12 02:22:17,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 310 flow [2023-11-12 02:22:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2023-11-12 02:22:17,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47033398821218075 [2023-11-12 02:22:17,375 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2023-11-12 02:22:17,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2023-11-12 02:22:17,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:17,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2023-11-12 02:22:17,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:17,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:17,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:17,415 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 5 states and 1197 transitions. [2023-11-12 02:22:17,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 310 flow [2023-11-12 02:22:17,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 282 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-12 02:22:17,429 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 94 flow [2023-11-12 02:22:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-12 02:22:17,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-12 02:22:17,440 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 94 flow [2023-11-12 02:22:17,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:17,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:17,443 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] [2023-11-12 02:22:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:17,444 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 2 more)] === [2023-11-12 02:22:17,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1123758089, now seen corresponding path program 1 times [2023-11-12 02:22:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051624779] [2023-11-12 02:22:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:17,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:17,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051624779] [2023-11-12 02:22:17,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051624779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:17,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:17,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:17,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421504373] [2023-11-12 02:22:17,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:17,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:17,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 509 [2023-11-12 02:22:17,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 509 [2023-11-12 02:22:17,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:18,361 INFO L124 PetriNetUnfolderBase]: 2374/3227 cut-off events. [2023-11-12 02:22:18,361 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-11-12 02:22:18,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7136 conditions, 3227 events. 2374/3227 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11500 event pairs, 1822 based on Foata normal form. 98/2613 useless extension candidates. Maximal degree in co-relation 3186. Up to 2423 conditions per place. [2023-11-12 02:22:18,390 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 33 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-11-12 02:22:18,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 265 flow [2023-11-12 02:22:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1148 transitions. [2023-11-12 02:22:18,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108055009823184 [2023-11-12 02:22:18,397 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1148 transitions. [2023-11-12 02:22:18,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1148 transitions. [2023-11-12 02:22:18,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:18,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1148 transitions. [2023-11-12 02:22:18,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.6) internal successors, (1148), 5 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:18,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:18,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:18,412 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 94 flow. Second operand 5 states and 1148 transitions. [2023-11-12 02:22:18,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 265 flow [2023-11-12 02:22:18,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 252 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:18,416 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 106 flow [2023-11-12 02:22:18,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-12 02:22:18,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-11-12 02:22:18,418 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 106 flow [2023-11-12 02:22:18,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:18,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:18,419 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, 1] [2023-11-12 02:22:18,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:18,420 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 2 more)] === [2023-11-12 02:22:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1228634178, now seen corresponding path program 1 times [2023-11-12 02:22:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:18,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857419345] [2023-11-12 02:22:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857419345] [2023-11-12 02:22:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857419345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405352396] [2023-11-12 02:22:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:18,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:18,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:18,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:18,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:22:18,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:19,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:19,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405352396] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:19,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-11-12 02:22:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363301221] [2023-11-12 02:22:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:22:19,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 509 [2023-11-12 02:22:19,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:19,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:19,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 509 [2023-11-12 02:22:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:20,192 INFO L124 PetriNetUnfolderBase]: 3225/4317 cut-off events. [2023-11-12 02:22:20,192 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2023-11-12 02:22:20,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9903 conditions, 4317 events. 3225/4317 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17304 event pairs, 143 based on Foata normal form. 92/3603 useless extension candidates. Maximal degree in co-relation 9889. Up to 1337 conditions per place. [2023-11-12 02:22:20,236 INFO L140 encePairwiseOnDemand]: 501/509 looper letters, 100 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2023-11-12 02:22:20,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 114 transitions, 526 flow [2023-11-12 02:22:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:22:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:22:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1630 transitions. [2023-11-12 02:22:20,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574796519786697 [2023-11-12 02:22:20,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1630 transitions. [2023-11-12 02:22:20,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1630 transitions. [2023-11-12 02:22:20,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:20,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1630 transitions. [2023-11-12 02:22:20,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.85714285714286) internal successors, (1630), 7 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:20,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:20,261 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:20,261 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 106 flow. Second operand 7 states and 1630 transitions. [2023-11-12 02:22:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 114 transitions, 526 flow [2023-11-12 02:22:20,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 114 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:20,266 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 193 flow [2023-11-12 02:22:20,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-12 02:22:20,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-12 02:22:20,268 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 193 flow [2023-11-12 02:22:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:20,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:20,269 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, 1] [2023-11-12 02:22:20,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:20,476 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 2 more)] === [2023-11-12 02:22:20,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1782110852, now seen corresponding path program 2 times [2023-11-12 02:22:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737641020] [2023-11-12 02:22:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:20,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:20,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737641020] [2023-11-12 02:22:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737641020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:20,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:20,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960273512] [2023-11-12 02:22:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:20,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:20,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 509 [2023-11-12 02:22:20,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:20,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:20,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 509 [2023-11-12 02:22:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:21,852 INFO L124 PetriNetUnfolderBase]: 4227/5655 cut-off events. [2023-11-12 02:22:21,853 INFO L125 PetriNetUnfolderBase]: For 4516/4516 co-relation queries the response was YES. [2023-11-12 02:22:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16538 conditions, 5655 events. 4227/5655 cut-off events. For 4516/4516 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23053 event pairs, 501 based on Foata normal form. 152/5074 useless extension candidates. Maximal degree in co-relation 16516. Up to 4027 conditions per place. [2023-11-12 02:22:21,912 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 83 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-11-12 02:22:21,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 538 flow [2023-11-12 02:22:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1414 transitions. [2023-11-12 02:22:21,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629993451211526 [2023-11-12 02:22:21,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1414 transitions. [2023-11-12 02:22:21,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1414 transitions. [2023-11-12 02:22:21,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:21,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1414 transitions. [2023-11-12 02:22:21,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.66666666666666) internal successors, (1414), 6 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:21,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:21,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:21,934 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 193 flow. Second operand 6 states and 1414 transitions. [2023-11-12 02:22:21,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 538 flow [2023-11-12 02:22:21,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 515 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:21,985 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 247 flow [2023-11-12 02:22:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-12 02:22:21,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-11-12 02:22:21,988 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 247 flow [2023-11-12 02:22:21,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:21,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:21,989 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, 1, 1, 1] [2023-11-12 02:22:21,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:22:21,990 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 2 more)] === [2023-11-12 02:22:21,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1002067457, now seen corresponding path program 1 times [2023-11-12 02:22:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:21,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159291853] [2023-11-12 02:22:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:24,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:24,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159291853] [2023-11-12 02:22:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159291853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860195060] [2023-11-12 02:22:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:24,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:24,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:24,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:24,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 02:22:24,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:24,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-12 02:22:24,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-12 02:22:24,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:22:24,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:22:24,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:22:24,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:22:25,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 02:22:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:25,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:26,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:26,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 61 [2023-11-12 02:22:26,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10283 treesize of output 10027 [2023-11-12 02:22:26,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 275 [2023-11-12 02:22:26,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 263 [2023-11-12 02:22:26,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 215 [2023-11-12 02:22:26,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 213 [2023-11-12 02:22:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860195060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:26,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:26,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-12 02:22:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679329627] [2023-11-12 02:22:26,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:26,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:22:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:22:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=574, Unknown=9, NotChecked=0, Total=702 [2023-11-12 02:22:29,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:22:32,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:22:36,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:22:36,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 509 [2023-11-12 02:22:36,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 247 flow. Second operand has 27 states, 27 states have (on average 163.7037037037037) internal successors, (4420), 27 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:36,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:36,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 509 [2023-11-12 02:22:36,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:40,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:22:48,392 INFO L124 PetriNetUnfolderBase]: 19529/26049 cut-off events. [2023-11-12 02:22:48,392 INFO L125 PetriNetUnfolderBase]: For 28142/28142 co-relation queries the response was YES. [2023-11-12 02:22:48,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76497 conditions, 26049 events. 19529/26049 cut-off events. For 28142/28142 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 130537 event pairs, 2422 based on Foata normal form. 328/22297 useless extension candidates. Maximal degree in co-relation 45258. Up to 7676 conditions per place. [2023-11-12 02:22:48,555 INFO L140 encePairwiseOnDemand]: 497/509 looper letters, 405 selfloop transitions, 100 changer transitions 15/521 dead transitions. [2023-11-12 02:22:48,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 521 transitions, 3132 flow [2023-11-12 02:22:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:22:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-12 02:22:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6269 transitions. [2023-11-12 02:22:48,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3421196245361275 [2023-11-12 02:22:48,582 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6269 transitions. [2023-11-12 02:22:48,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6269 transitions. [2023-11-12 02:22:48,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:48,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6269 transitions. [2023-11-12 02:22:48,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 174.13888888888889) internal successors, (6269), 36 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:48,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 509.0) internal successors, (18833), 37 states have internal predecessors, (18833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:48,655 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 509.0) internal successors, (18833), 37 states have internal predecessors, (18833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:48,656 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 247 flow. Second operand 36 states and 6269 transitions. [2023-11-12 02:22:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 521 transitions, 3132 flow [2023-11-12 02:22:48,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 521 transitions, 3111 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:48,884 INFO L231 Difference]: Finished difference. Result has 109 places, 156 transitions, 1217 flow [2023-11-12 02:22:48,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1217, PETRI_PLACES=109, PETRI_TRANSITIONS=156} [2023-11-12 02:22:48,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2023-11-12 02:22:48,886 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 156 transitions, 1217 flow [2023-11-12 02:22:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 163.7037037037037) internal successors, (4420), 27 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:48,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:48,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1] [2023-11-12 02:22:48,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc06862b-4940-49cc-b5fb-2d031f926845/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:49,094 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 2 more)] === [2023-11-12 02:22:49,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -587169254, now seen corresponding path program 2 times [2023-11-12 02:22:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936524556] [2023-11-12 02:22:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat