./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:22:00,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:22:00,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:22:00,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:22:00,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:22:01,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:22:01,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:22:01,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:22:01,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:22:01,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:22:01,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:22:01,023 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:22:01,024 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:22:01,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:22:01,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:22:01,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:22:01,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:22:01,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:22:01,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:22:01,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:22:01,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:22:01,034 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:22:01,034 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:22:01,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:22:01,035 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:22:01,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:22:01,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:22:01,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:22:01,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:01,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:22:01,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:22:01,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:22:01,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:22:01,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:22:01,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:22:01,041 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:22:01,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:22:01,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:22:01,042 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:22:01,042 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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2023-11-12 02:22:01,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:22:01,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:22:01,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:22:01,547 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:22:01,548 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:22:01,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-12 02:22:05,141 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:05,431 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:05,432 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-12 02:22:05,444 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/data/d4e152c1e/07ce3ea52ab6471baf1ab85a307650c7/FLAG8daed4397 [2023-11-12 02:22:05,465 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/data/d4e152c1e/07ce3ea52ab6471baf1ab85a307650c7 [2023-11-12 02:22:05,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:05,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:05,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:05,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:05,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:05,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:05" (1/1) ... [2023-11-12 02:22:05,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec0e0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:05, skipping insertion in model container [2023-11-12 02:22:05,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:05" (1/1) ... [2023-11-12 02:22:05,570 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:05,899 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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-12 02:22:05,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:05,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:05,977 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_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-12 02:22:05,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:06,009 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:06,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06 WrapperNode [2023-11-12 02:22:06,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:06,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:06,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:06,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:06,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,042 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,094 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 283 [2023-11-12 02:22:06,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:06,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:06,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:06,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:06,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:06,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:06,163 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:06,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:06,164 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (1/1) ... [2023-11-12 02:22:06,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:06,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:06,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:22:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:22:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:22:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:22:06,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:22:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:22:06,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:22:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:22:06,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:22:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:22:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:22:06,267 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 02:22:06,431 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:06,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:07,055 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:07,076 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:07,081 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:22:07,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:07 BoogieIcfgContainer [2023-11-12 02:22:07,087 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:07,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:07,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:07,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:07,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:05" (1/3) ... [2023-11-12 02:22:07,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fc6a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:07, skipping insertion in model container [2023-11-12 02:22:07,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:06" (2/3) ... [2023-11-12 02:22:07,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fc6a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:07, skipping insertion in model container [2023-11-12 02:22:07,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:07" (3/3) ... [2023-11-12 02:22:07,103 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-12 02:22:07,113 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:22:07,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:07,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:07,126 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:22:07,315 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:22:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 377 transitions, 775 flow [2023-11-12 02:22:07,724 INFO L124 PetriNetUnfolderBase]: 29/374 cut-off events. [2023-11-12 02:22:07,725 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:07,737 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. [2023-11-12 02:22:07,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 377 transitions, 775 flow [2023-11-12 02:22:07,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 363 transitions, 744 flow [2023-11-12 02:22:07,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:22:07,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 363 transitions, 744 flow [2023-11-12 02:22:07,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 363 transitions, 744 flow [2023-11-12 02:22:07,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 363 transitions, 744 flow [2023-11-12 02:22:07,906 INFO L124 PetriNetUnfolderBase]: 29/363 cut-off events. [2023-11-12 02:22:07,906 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:07,913 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. [2023-11-12 02:22:07,928 INFO L119 LiptonReduction]: Number of co-enabled transitions 18862 [2023-11-12 02:22:21,814 INFO L134 LiptonReduction]: Checked pairs total: 16659 [2023-11-12 02:22:21,815 INFO L136 LiptonReduction]: Total number of compositions: 426 [2023-11-12 02:22:21,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:21,855 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;@3e0bdab5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:21,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:22:21,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:22:21,865 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-12 02:22:21,865 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:21,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:21,866 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] [2023-11-12 02:22:21,867 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)] === [2023-11-12 02:22:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1430996849, now seen corresponding path program 1 times [2023-11-12 02:22:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:21,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154939806] [2023-11-12 02:22:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:22,807 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 02:22:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154939806] [2023-11-12 02:22:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154939806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:22,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:22:22,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15514281] [2023-11-12 02:22:22,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:22,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 803 [2023-11-12 02:22:22,917 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) [2023-11-12 02:22:22,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:22,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 803 [2023-11-12 02:22:22,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:23,108 INFO L124 PetriNetUnfolderBase]: 431/636 cut-off events. [2023-11-12 02:22:23,108 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-12 02:22:23,110 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. [2023-11-12 02:22:23,115 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 42 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2023-11-12 02:22:23,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 221 flow [2023-11-12 02:22:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-11-12 02:22:23,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44831880448318806 [2023-11-12 02:22:23,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-11-12 02:22:23,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-11-12 02:22:23,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:23,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-11-12 02:22:23,163 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) [2023-11-12 02:22:23,177 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) [2023-11-12 02:22:23,180 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) [2023-11-12 02:22:23,182 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 1080 transitions. [2023-11-12 02:22:23,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 221 flow [2023-11-12 02:22:23,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:22:23,192 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 88 flow [2023-11-12 02:22:23,195 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} [2023-11-12 02:22:23,199 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-12 02:22:23,199 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 88 flow [2023-11-12 02:22:23,201 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) [2023-11-12 02:22:23,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:23,201 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] [2023-11-12 02:22:23,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:23,202 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)] === [2023-11-12 02:22:23,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2088282306, now seen corresponding path program 1 times [2023-11-12 02:22:23,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:23,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585145244] [2023-11-12 02:22:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:23,479 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 02:22:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585145244] [2023-11-12 02:22:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585145244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:23,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:23,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125880415] [2023-11-12 02:22:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:23,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-12 02:22:23,706 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) [2023-11-12 02:22:23,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:23,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-12 02:22:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:24,101 INFO L124 PetriNetUnfolderBase]: 793/1193 cut-off events. [2023-11-12 02:22:24,101 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-12 02:22:24,103 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. [2023-11-12 02:22:24,114 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 65 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2023-11-12 02:22:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 80 transitions, 376 flow [2023-11-12 02:22:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2012 transitions. [2023-11-12 02:22:24,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41760066417600666 [2023-11-12 02:22:24,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2012 transitions. [2023-11-12 02:22:24,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2012 transitions. [2023-11-12 02:22:24,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:24,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2012 transitions. [2023-11-12 02:22:24,137 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) [2023-11-12 02:22:24,151 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) [2023-11-12 02:22:24,159 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) [2023-11-12 02:22:24,160 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 88 flow. Second operand 6 states and 2012 transitions. [2023-11-12 02:22:24,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 80 transitions, 376 flow [2023-11-12 02:22:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:24,166 INFO L231 Difference]: Finished difference. Result has 37 places, 44 transitions, 188 flow [2023-11-12 02:22:24,166 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} [2023-11-12 02:22:24,168 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-11-12 02:22:24,169 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 44 transitions, 188 flow [2023-11-12 02:22:24,170 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) [2023-11-12 02:22:24,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:24,178 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] [2023-11-12 02:22:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:24,178 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)] === [2023-11-12 02:22:24,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1348495208, now seen corresponding path program 1 times [2023-11-12 02:22:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795747580] [2023-11-12 02:22:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:24,345 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 02:22:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:24,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795747580] [2023-11-12 02:22:24,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795747580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:24,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:24,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145884231] [2023-11-12 02:22:24,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:24,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:24,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-12 02:22:24,590 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) [2023-11-12 02:22:24,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:24,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-12 02:22:24,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:24,935 INFO L124 PetriNetUnfolderBase]: 691/1061 cut-off events. [2023-11-12 02:22:24,936 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2023-11-12 02:22:24,938 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. [2023-11-12 02:22:24,946 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 61 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2023-11-12 02:22:24,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 442 flow [2023-11-12 02:22:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2010 transitions. [2023-11-12 02:22:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41718555417185554 [2023-11-12 02:22:24,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2010 transitions. [2023-11-12 02:22:24,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2010 transitions. [2023-11-12 02:22:24,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:24,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2010 transitions. [2023-11-12 02:22:24,970 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) [2023-11-12 02:22:24,985 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) [2023-11-12 02:22:24,989 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) [2023-11-12 02:22:24,990 INFO L175 Difference]: Start difference. First operand has 37 places, 44 transitions, 188 flow. Second operand 6 states and 2010 transitions. [2023-11-12 02:22:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 442 flow [2023-11-12 02:22:24,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:24,999 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 239 flow [2023-11-12 02:22:24,999 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} [2023-11-12 02:22:25,002 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-11-12 02:22:25,007 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 239 flow [2023-11-12 02:22:25,008 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) [2023-11-12 02:22:25,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:25,009 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] [2023-11-12 02:22:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:22:25,010 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)] === [2023-11-12 02:22:25,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash 361837902, now seen corresponding path program 1 times [2023-11-12 02:22:25,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:25,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707279191] [2023-11-12 02:22:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:25,198 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 02:22:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:25,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707279191] [2023-11-12 02:22:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707279191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:25,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:25,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463141152] [2023-11-12 02:22:25,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 803 [2023-11-12 02:22:25,358 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) [2023-11-12 02:22:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 803 [2023-11-12 02:22:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:25,644 INFO L124 PetriNetUnfolderBase]: 575/891 cut-off events. [2023-11-12 02:22:25,644 INFO L125 PetriNetUnfolderBase]: For 870/870 co-relation queries the response was YES. [2023-11-12 02:22:25,646 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. [2023-11-12 02:22:25,652 INFO L140 encePairwiseOnDemand]: 793/803 looper letters, 28 selfloop transitions, 6 changer transitions 37/71 dead transitions. [2023-11-12 02:22:25,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 467 flow [2023-11-12 02:22:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2007 transitions. [2023-11-12 02:22:25,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165628891656289 [2023-11-12 02:22:25,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2007 transitions. [2023-11-12 02:22:25,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2007 transitions. [2023-11-12 02:22:25,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:25,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2007 transitions. [2023-11-12 02:22:25,688 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) [2023-11-12 02:22:25,700 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) [2023-11-12 02:22:25,705 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) [2023-11-12 02:22:25,705 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 239 flow. Second operand 6 states and 2007 transitions. [2023-11-12 02:22:25,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 467 flow [2023-11-12 02:22:25,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 446 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:25,711 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 156 flow [2023-11-12 02:22:25,711 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} [2023-11-12 02:22:25,712 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-12 02:22:25,712 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 156 flow [2023-11-12 02:22:25,713 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) [2023-11-12 02:22:25,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:25,713 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] [2023-11-12 02:22:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:22:25,714 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)] === [2023-11-12 02:22:25,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1689235102, now seen corresponding path program 1 times [2023-11-12 02:22:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:25,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638040601] [2023-11-12 02:22:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:25,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638040601] [2023-11-12 02:22:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638040601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:25,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457740323] [2023-11-12 02:22:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:25,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:25,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:25,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:26,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:26,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:26,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457740323] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:26,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:22:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52575212] [2023-11-12 02:22:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:26,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-12 02:22:26,386 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) [2023-11-12 02:22:26,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:26,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-12 02:22:26,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:26,557 INFO L124 PetriNetUnfolderBase]: 416/613 cut-off events. [2023-11-12 02:22:26,557 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-12 02:22:26,559 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. [2023-11-12 02:22:26,563 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-12 02:22:26,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 308 flow [2023-11-12 02:22:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-12 02:22:26,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-12 02:22:26,570 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-12 02:22:26,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-12 02:22:26,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:26,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-12 02:22:26,576 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) [2023-11-12 02:22:26,583 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) [2023-11-12 02:22:26,585 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) [2023-11-12 02:22:26,585 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 156 flow. Second operand 5 states and 1622 transitions. [2023-11-12 02:22:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 308 flow [2023-11-12 02:22:26,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 244 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-11-12 02:22:26,591 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 129 flow [2023-11-12 02:22:26,591 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} [2023-11-12 02:22:26,592 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-12 02:22:26,592 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 129 flow [2023-11-12 02:22:26,593 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) [2023-11-12 02:22:26,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:26,594 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] [2023-11-12 02:22:26,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:26,801 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)] === [2023-11-12 02:22:26,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2048330752, now seen corresponding path program 1 times [2023-11-12 02:22:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922735162] [2023-11-12 02:22:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:26,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:26,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922735162] [2023-11-12 02:22:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922735162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527284945] [2023-11-12 02:22:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:26,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:26,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:27,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:27,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:27,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527284945] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:27,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:22:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871109020] [2023-11-12 02:22:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:27,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-12 02:22:27,394 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) [2023-11-12 02:22:27,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:27,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-12 02:22:27,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:27,551 INFO L124 PetriNetUnfolderBase]: 410/601 cut-off events. [2023-11-12 02:22:27,551 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-11-12 02:22:27,552 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. [2023-11-12 02:22:27,556 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 45 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-12 02:22:27,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 286 flow [2023-11-12 02:22:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-12 02:22:27,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-12 02:22:27,563 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-12 02:22:27,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-12 02:22:27,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:27,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-12 02:22:27,570 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) [2023-11-12 02:22:27,577 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) [2023-11-12 02:22:27,580 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) [2023-11-12 02:22:27,580 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 129 flow. Second operand 5 states and 1622 transitions. [2023-11-12 02:22:27,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 286 flow [2023-11-12 02:22:27,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 268 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:27,584 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 139 flow [2023-11-12 02:22:27,584 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} [2023-11-12 02:22:27,586 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-12 02:22:27,587 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 139 flow [2023-11-12 02:22:27,588 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) [2023-11-12 02:22:27,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:27,588 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 02:22:27,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:22:27,794 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)] === [2023-11-12 02:22:27,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1056169113, now seen corresponding path program 1 times [2023-11-12 02:22:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:27,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374141214] [2023-11-12 02:22:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:22:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374141214] [2023-11-12 02:22:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374141214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317330894] [2023-11-12 02:22:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:27,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:27,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:27,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:28,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:28,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:28,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:22:28,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:22:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317330894] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:28,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:28,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:22:28,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323727034] [2023-11-12 02:22:28,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:28,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:28,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:28,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 803 [2023-11-12 02:22:28,438 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) [2023-11-12 02:22:28,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:28,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 803 [2023-11-12 02:22:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:28,638 INFO L124 PetriNetUnfolderBase]: 468/685 cut-off events. [2023-11-12 02:22:28,638 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-11-12 02:22:28,640 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. [2023-11-12 02:22:28,646 INFO L140 encePairwiseOnDemand]: 798/803 looper letters, 47 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-12 02:22:28,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 310 flow [2023-11-12 02:22:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1622 transitions. [2023-11-12 02:22:28,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039850560398506 [2023-11-12 02:22:28,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1622 transitions. [2023-11-12 02:22:28,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1622 transitions. [2023-11-12 02:22:28,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:28,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1622 transitions. [2023-11-12 02:22:28,678 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) [2023-11-12 02:22:28,688 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) [2023-11-12 02:22:28,691 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) [2023-11-12 02:22:28,691 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 139 flow. Second operand 5 states and 1622 transitions. [2023-11-12 02:22:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 310 flow [2023-11-12 02:22:28,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:28,695 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 149 flow [2023-11-12 02:22:28,695 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} [2023-11-12 02:22:28,696 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-11-12 02:22:28,696 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 149 flow [2023-11-12 02:22:28,697 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) [2023-11-12 02:22:28,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:28,698 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 02:22:28,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:28,912 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)] === [2023-11-12 02:22:28,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash 41454504, now seen corresponding path program 1 times [2023-11-12 02:22:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918196238] [2023-11-12 02:22:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918196238] [2023-11-12 02:22:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918196238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:30,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803949994] [2023-11-12 02:22:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:30,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:30,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-12 02:22:30,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:31,112 INFO L351 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 [2023-11-12 02:22:31,222 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:22:31,223 INFO L351 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 [2023-11-12 02:22:31,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:22:31,718 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:22:31,926 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-12 02:22:31,927 INFO L351 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 [2023-11-12 02:22:32,268 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:32,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-11-12 02:22:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:32,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:36,305 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (v_ArrVal_272 (Array Int 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) c_~B~0.offset))) (= (+ .cse0 c_~csum~0 .cse1) (+ (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) c_~B~0.offset)) c_~asum~0 c_~bsum~0))))) is different from false [2023-11-12 02:22:36,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:36,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1922 treesize of output 1694 [2023-11-12 02:22:36,594 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:36,595 INFO L351 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 [2023-11-12 02:22:41,527 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:41,792 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 45 treesize of output 43 [2023-11-12 02:22:41,799 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 58 treesize of output 40 [2023-11-12 02:22:41,816 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 105 treesize of output 101 [2023-11-12 02:22:41,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:41,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2023-11-12 02:22:41,929 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 802 treesize of output 760 [2023-11-12 02:22:41,973 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:41,973 INFO L351 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 713 treesize of output 463 [2023-11-12 02:22:42,073 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 8 treesize of output 6 [2023-11-12 02:22:42,127 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,141 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,154 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,163 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:42,227 INFO L351 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 859 treesize of output 569 [2023-11-12 02:22:42,885 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:42,886 INFO L351 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 60 treesize of output 52 [2023-11-12 02:22:42,915 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:22:42,925 INFO L351 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 [2023-11-12 02:22:42,938 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,946 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:42,954 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:43,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:43,007 INFO L351 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 [2023-11-12 02:22:43,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:43,088 INFO L351 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 859 treesize of output 569 [2023-11-12 02:22:43,585 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:43,586 INFO L351 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 48 treesize of output 48 [2023-11-12 02:22:43,627 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:43,636 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:43,643 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:43,650 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 02:22:43,935 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:43,936 INFO L351 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 [2023-11-12 02:22:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:44,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803949994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:44,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:44,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-12 02:22:44,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040543839] [2023-11-12 02:22:44,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:44,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-12 02:22:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-12 02:22:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=856, Unknown=15, NotChecked=60, Total=1056 [2023-11-12 02:22:44,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 803 [2023-11-12 02:22:44,205 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) [2023-11-12 02:22:44,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 803 [2023-11-12 02:22:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:45,510 INFO L124 PetriNetUnfolderBase]: 682/998 cut-off events. [2023-11-12 02:22:45,510 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2023-11-12 02:22:45,512 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. [2023-11-12 02:22:45,521 INFO L140 encePairwiseOnDemand]: 791/803 looper letters, 75 selfloop transitions, 28 changer transitions 1/104 dead transitions. [2023-11-12 02:22:45,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 104 transitions, 603 flow [2023-11-12 02:22:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:22:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:22:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3315 transitions. [2023-11-12 02:22:45,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34402241594022415 [2023-11-12 02:22:45,536 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3315 transitions. [2023-11-12 02:22:45,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3315 transitions. [2023-11-12 02:22:45,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:45,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3315 transitions. [2023-11-12 02:22:45,549 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) [2023-11-12 02:22:45,566 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) [2023-11-12 02:22:45,570 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) [2023-11-12 02:22:45,570 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 149 flow. Second operand 12 states and 3315 transitions. [2023-11-12 02:22:45,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 104 transitions, 603 flow [2023-11-12 02:22:45,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 104 transitions, 576 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:45,575 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 331 flow [2023-11-12 02:22:45,576 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} [2023-11-12 02:22:45,576 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-11-12 02:22:45,577 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 331 flow [2023-11-12 02:22:45,582 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) [2023-11-12 02:22:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:45,582 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 02:22:45,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:22:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:45,790 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)] === [2023-11-12 02:22:45,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2123952584, now seen corresponding path program 2 times [2023-11-12 02:22:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:45,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753547440] [2023-11-12 02:22:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:45,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:47,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753547440] [2023-11-12 02:22:47,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753547440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830389839] [2023-11-12 02:22:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:47,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:47,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:47,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:47,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f23bf26-aee6-40f9-9d6a-8b5f0a7dc78f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:48,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:48,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:48,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:22:48,100 INFO L285 TraceCheckSpWp]: Computing forward predicates...