./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/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_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/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_85ef2726-ae97-425d-9118-3dae732d29e1/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 ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:02,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:02,112 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:02,118 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:02,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:02,163 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:02,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:02,164 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:02,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:02,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:02,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:02,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:02,167 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:02,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:02,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:02,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:02,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:02,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:02,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:02,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:02,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:02,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:02,172 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:02,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:02,173 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:02,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:02,174 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:02,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:02,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:02,175 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:02,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:02,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:02,177 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:02,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:02,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:02,187 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:02,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:02,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:02,188 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:02,192 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_85ef2726-ae97-425d-9118-3dae732d29e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-12 02:26:02,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:02,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:02,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:02,554 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:02,555 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:02,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-12 02:26:05,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:06,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:06,040 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-12 02:26:06,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/data/5aa5159fa/63096c27c48641959da2c0760d2a2fa8/FLAGd4e56db81 [2023-11-12 02:26:06,071 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/data/5aa5159fa/63096c27c48641959da2c0760d2a2fa8 [2023-11-12 02:26:06,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:06,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:06,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:06,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:06,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:06,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1136115e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06, skipping insertion in model container [2023-11-12 02:26:06,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,120 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:06,322 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_85ef2726-ae97-425d-9118-3dae732d29e1/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2454,2467] [2023-11-12 02:26:06,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:06,349 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:06,374 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_85ef2726-ae97-425d-9118-3dae732d29e1/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2454,2467] [2023-11-12 02:26:06,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:06,390 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:26:06,391 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:26:06,399 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:06,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06 WrapperNode [2023-11-12 02:26:06,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:06,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:06,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:06,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:06,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,449 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 150 [2023-11-12 02:26:06,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:06,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:06,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:06,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:06,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:06,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:06,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:06,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:06,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (1/1) ... [2023-11-12 02:26:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:06,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:06,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:26:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:26:06,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:26:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:26:06,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:26:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:26:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:26:06,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:26:06,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:06,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:06,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:26:06,607 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 02:26:06,834 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:06,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:07,210 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:07,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:07,406 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:26:07,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:07 BoogieIcfgContainer [2023-11-12 02:26:07,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:07,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:07,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:07,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:07,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:06" (1/3) ... [2023-11-12 02:26:07,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573a4306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:07, skipping insertion in model container [2023-11-12 02:26:07,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:06" (2/3) ... [2023-11-12 02:26:07,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573a4306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:07, skipping insertion in model container [2023-11-12 02:26:07,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:07" (3/3) ... [2023-11-12 02:26:07,434 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-11-12 02:26:07,444 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:26:07,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:07,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:26:07,454 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:26:07,521 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:26:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 122 transitions, 258 flow [2023-11-12 02:26:07,635 INFO L124 PetriNetUnfolderBase]: 9/120 cut-off events. [2023-11-12 02:26:07,636 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:07,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 9/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-12 02:26:07,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 122 transitions, 258 flow [2023-11-12 02:26:07,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 234 flow [2023-11-12 02:26:07,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:26:07,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 234 flow [2023-11-12 02:26:07,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 234 flow [2023-11-12 02:26:07,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 234 flow [2023-11-12 02:26:07,703 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-12 02:26:07,704 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:07,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 111 events. 9/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-12 02:26:07,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-11-12 02:26:11,683 INFO L134 LiptonReduction]: Checked pairs total: 888 [2023-11-12 02:26:11,683 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-12 02:26:11,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:11,705 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;@2e75735f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:11,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:26:11,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:26:11,744 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-11-12 02:26:11,744 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:11,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:11,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:11,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:11,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1528982167, now seen corresponding path program 1 times [2023-11-12 02:26:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670772562] [2023-11-12 02:26:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:12,091 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 02:26:12,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:12,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670772562] [2023-11-12 02:26:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670772562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:12,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:12,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:26:12,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83770669] [2023-11-12 02:26:12,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:12,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 229 [2023-11-12 02:26:12,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 02:26:12,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:12,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 229 [2023-11-12 02:26:12,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:12,287 INFO L124 PetriNetUnfolderBase]: 125/222 cut-off events. [2023-11-12 02:26:12,288 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-12 02:26:12,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 222 events. 125/222 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 702 event pairs, 45 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 380. Up to 126 conditions per place. [2023-11-12 02:26:12,292 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 29 selfloop transitions, 3 changer transitions 1/33 dead transitions. [2023-11-12 02:26:12,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 33 transitions, 153 flow [2023-11-12 02:26:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-11-12 02:26:12,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512372634643377 [2023-11-12 02:26:12,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-11-12 02:26:12,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-11-12 02:26:12,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:12,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-11-12 02:26:12,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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 02:26:12,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 02:26:12,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 02:26:12,328 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 352 transitions. [2023-11-12 02:26:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 33 transitions, 153 flow [2023-11-12 02:26:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:26:12,334 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 61 flow [2023-11-12 02:26:12,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-11-12 02:26:12,340 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-11-12 02:26:12,340 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 61 flow [2023-11-12 02:26:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 02:26:12,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:12,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:12,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:26:12,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:12,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1928476680, now seen corresponding path program 1 times [2023-11-12 02:26:12,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:12,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530368929] [2023-11-12 02:26:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:12,604 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 02:26:12,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:12,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530368929] [2023-11-12 02:26:12,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530368929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:12,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:12,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:26:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90484834] [2023-11-12 02:26:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:12,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:12,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:26:12,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:26:12,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 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 02:26:12,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:12,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:26:12,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:12,849 INFO L124 PetriNetUnfolderBase]: 193/357 cut-off events. [2023-11-12 02:26:12,850 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-12 02:26:12,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 357 events. 193/357 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1351 event pairs, 129 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 349. Up to 223 conditions per place. [2023-11-12 02:26:12,859 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 41 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-12 02:26:12,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 46 transitions, 220 flow [2023-11-12 02:26:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:26:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:26:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-11-12 02:26:12,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611353711790393 [2023-11-12 02:26:12,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-11-12 02:26:12,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-11-12 02:26:12,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:12,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-11-12 02:26:12,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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 02:26:12,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:12,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:12,884 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 61 flow. Second operand 5 states and 528 transitions. [2023-11-12 02:26:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 46 transitions, 220 flow [2023-11-12 02:26:12,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:26:12,888 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 94 flow [2023-11-12 02:26:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-12 02:26:12,890 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-11-12 02:26:12,896 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 94 flow [2023-11-12 02:26:12,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 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 02:26:12,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:12,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:26:12,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:12,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1344571376, now seen corresponding path program 1 times [2023-11-12 02:26:12,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809518281] [2023-11-12 02:26:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:13,058 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 02:26:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809518281] [2023-11-12 02:26:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809518281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:13,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:13,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:26:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278474405] [2023-11-12 02:26:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:26:13,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-12 02:26:13,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 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 02:26:13,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:13,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-12 02:26:13,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:13,235 INFO L124 PetriNetUnfolderBase]: 149/279 cut-off events. [2023-11-12 02:26:13,235 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-12 02:26:13,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 279 events. 149/279 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 958 event pairs, 105 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 549. Up to 223 conditions per place. [2023-11-12 02:26:13,238 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 20 selfloop transitions, 2 changer transitions 17/39 dead transitions. [2023-11-12 02:26:13,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 213 flow [2023-11-12 02:26:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:26:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:26:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-11-12 02:26:13,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45676855895196505 [2023-11-12 02:26:13,241 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-11-12 02:26:13,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-11-12 02:26:13,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:13,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-11-12 02:26:13,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 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 02:26:13,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:13,249 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:13,249 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 94 flow. Second operand 5 states and 523 transitions. [2023-11-12 02:26:13,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 213 flow [2023-11-12 02:26:13,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 209 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:26:13,252 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 82 flow [2023-11-12 02:26:13,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-11-12 02:26:13,253 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-11-12 02:26:13,253 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 82 flow [2023-11-12 02:26:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 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 02:26:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:13,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:26:13,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash 861295810, now seen corresponding path program 1 times [2023-11-12 02:26:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074127118] [2023-11-12 02:26:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074127118] [2023-11-12 02:26:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074127118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711693043] [2023-11-12 02:26:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:13,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:13,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:26:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:13,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:26:13,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:13,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711693043] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:13,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-12 02:26:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483436179] [2023-11-12 02:26:13,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:26:13,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-11-12 02:26:13,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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 02:26:13,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:13,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-11-12 02:26:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:13,867 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2023-11-12 02:26:13,867 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-12 02:26:13,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 217 events. 122/217 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 653 event pairs, 42 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 591. Up to 117 conditions per place. [2023-11-12 02:26:13,870 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 25 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-11-12 02:26:13,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 175 flow [2023-11-12 02:26:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:26:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:26:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 499 transitions. [2023-11-12 02:26:13,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43580786026200874 [2023-11-12 02:26:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 499 transitions. [2023-11-12 02:26:13,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 499 transitions. [2023-11-12 02:26:13,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:13,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 499 transitions. [2023-11-12 02:26:13,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 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 02:26:13,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:13,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:13,881 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 82 flow. Second operand 5 states and 499 transitions. [2023-11-12 02:26:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 175 flow [2023-11-12 02:26:13,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 149 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-12 02:26:13,884 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 91 flow [2023-11-12 02:26:13,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-12 02:26:13,885 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-11-12 02:26:13,885 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 91 flow [2023-11-12 02:26:13,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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 02:26:13,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:13,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:13,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:26:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:14,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1516073986, now seen corresponding path program 1 times [2023-11-12 02:26:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509346552] [2023-11-12 02:26:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:14,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509346552] [2023-11-12 02:26:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509346552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865327622] [2023-11-12 02:26:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:14,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:14,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:14,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:14,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:26:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:14,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:26:14,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:14,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:26:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865327622] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-12 02:26:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240263454] [2023-11-12 02:26:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:26:14,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-11-12 02:26:14,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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 02:26:14,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:14,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-11-12 02:26:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:14,558 INFO L124 PetriNetUnfolderBase]: 114/201 cut-off events. [2023-11-12 02:26:14,559 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-12 02:26:14,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 201 events. 114/201 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 597 event pairs, 39 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 553. Up to 112 conditions per place. [2023-11-12 02:26:14,561 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-11-12 02:26:14,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 202 flow [2023-11-12 02:26:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:26:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:26:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 499 transitions. [2023-11-12 02:26:14,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43580786026200874 [2023-11-12 02:26:14,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 499 transitions. [2023-11-12 02:26:14,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 499 transitions. [2023-11-12 02:26:14,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:14,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 499 transitions. [2023-11-12 02:26:14,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 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 02:26:14,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:14,571 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 02:26:14,571 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 91 flow. Second operand 5 states and 499 transitions. [2023-11-12 02:26:14,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 202 flow [2023-11-12 02:26:14,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 191 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:26:14,574 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 111 flow [2023-11-12 02:26:14,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-12 02:26:14,575 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-11-12 02:26:14,575 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 111 flow [2023-11-12 02:26:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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 02:26:14,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:14,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:14,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:14,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:14,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:14,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1189337669, now seen corresponding path program 1 times [2023-11-12 02:26:14,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:14,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936466741] [2023-11-12 02:26:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:14,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936466741] [2023-11-12 02:26:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936466741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614334727] [2023-11-12 02:26:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:15,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:15,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:15,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:26:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:15,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 02:26:15,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:15,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:26:15,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:26:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:26:15,975 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 02:26:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:16,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:16,213 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_105 (Array Int Int))) (= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_105) c_~A~0.base) c_~A~0.offset))) is different from false [2023-11-12 02:26:16,354 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_105 (Array Int Int)) (v_ArrVal_104 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_104))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_105) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0)))) is different from false [2023-11-12 02:26:16,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:16,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-11-12 02:26:16,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2023-11-12 02:26:16,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-12 02:26:16,394 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 24 treesize of output 20 [2023-11-12 02:26:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-12 02:26:16,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614334727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:16,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:16,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-11-12 02:26:16,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396548934] [2023-11-12 02:26:16,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:16,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:26:16,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:26:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=499, Unknown=17, NotChecked=94, Total=702 [2023-11-12 02:26:16,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 229 [2023-11-12 02:26:16,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 111 flow. Second operand has 27 states, 27 states have (on average 67.55555555555556) internal successors, (1824), 27 states have internal predecessors, (1824), 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 02:26:16,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:16,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 229 [2023-11-12 02:26:16,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:17,878 INFO L124 PetriNetUnfolderBase]: 317/546 cut-off events. [2023-11-12 02:26:17,878 INFO L125 PetriNetUnfolderBase]: For 514/514 co-relation queries the response was YES. [2023-11-12 02:26:17,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 546 events. 317/546 cut-off events. For 514/514 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2136 event pairs, 12 based on Foata normal form. 2/547 useless extension candidates. Maximal degree in co-relation 1794. Up to 214 conditions per place. [2023-11-12 02:26:17,885 INFO L140 encePairwiseOnDemand]: 217/229 looper letters, 95 selfloop transitions, 49 changer transitions 2/146 dead transitions. [2023-11-12 02:26:17,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 146 transitions, 919 flow [2023-11-12 02:26:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:26:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-12 02:26:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1595 transitions. [2023-11-12 02:26:17,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165938864628821 [2023-11-12 02:26:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1595 transitions. [2023-11-12 02:26:17,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1595 transitions. [2023-11-12 02:26:17,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:17,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1595 transitions. [2023-11-12 02:26:17,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.5) internal successors, (1595), 22 states have internal predecessors, (1595), 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 02:26:17,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 229.0) internal successors, (5267), 23 states have internal predecessors, (5267), 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 02:26:17,913 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 229.0) internal successors, (5267), 23 states have internal predecessors, (5267), 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 02:26:17,913 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 111 flow. Second operand 22 states and 1595 transitions. [2023-11-12 02:26:17,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 146 transitions, 919 flow [2023-11-12 02:26:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 146 transitions, 891 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:26:17,920 INFO L231 Difference]: Finished difference. Result has 61 places, 80 transitions, 628 flow [2023-11-12 02:26:17,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=628, PETRI_PLACES=61, PETRI_TRANSITIONS=80} [2023-11-12 02:26:17,921 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 38 predicate places. [2023-11-12 02:26:17,921 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 80 transitions, 628 flow [2023-11-12 02:26:17,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 67.55555555555556) internal successors, (1824), 27 states have internal predecessors, (1824), 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 02:26:17,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:17,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:17,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:18,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:26:18,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 976828253, now seen corresponding path program 2 times [2023-11-12 02:26:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098035217] [2023-11-12 02:26:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:26:18,177 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:26:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:26:18,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:26:18,246 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:26:18,247 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-12 02:26:18,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-12 02:26:18,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-12 02:26:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:26:18,254 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-12 02:26:18,260 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-12 02:26:18,260 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:26:18,320 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,321 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-12 02:26:18,322 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-12 02:26:18,324 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-12 02:26:18,325 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,326 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-12 02:26:18,327 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-12 02:26:18,328 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,328 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-12 02:26:18,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:26:18 BasicIcfg [2023-11-12 02:26:18,344 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:26:18,345 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:26:18,345 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:26:18,345 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:26:18,346 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:07" (3/4) ... [2023-11-12 02:26:18,347 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-12 02:26:18,376 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,379 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-12 02:26:18,380 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-12 02:26:18,382 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-12 02:26:18,383 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,389 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-12 02:26:18,389 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-12 02:26:18,389 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-12 02:26:18,390 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-12 02:26:18,445 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ef2726-ae97-425d-9118-3dae732d29e1/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:26:18,446 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:26:18,446 INFO L158 Benchmark]: Toolchain (without parser) took 12371.33ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 134.2MB in the beginning and 119.0MB in the end (delta: 15.2MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,447 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:26:18,447 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.36ms. Allocated memory is still 163.6MB. Free memory was 133.5MB in the beginning and 121.8MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.05ms. Allocated memory is still 163.6MB. Free memory was 121.8MB in the beginning and 119.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,448 INFO L158 Benchmark]: Boogie Preprocessor took 36.28ms. Allocated memory is still 163.6MB. Free memory was 119.7MB in the beginning and 118.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:26:18,448 INFO L158 Benchmark]: RCFGBuilder took 921.86ms. Allocated memory is still 163.6MB. Free memory was 118.3MB in the beginning and 106.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,449 INFO L158 Benchmark]: TraceAbstraction took 10931.59ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 106.1MB in the beginning and 125.3MB in the end (delta: -19.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,449 INFO L158 Benchmark]: Witness Printer took 101.16ms. Allocated memory is still 197.1MB. Free memory was 125.3MB in the beginning and 119.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 02:26:18,451 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.36ms. Allocated memory is still 163.6MB. Free memory was 133.5MB in the beginning and 121.8MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.05ms. Allocated memory is still 163.6MB. Free memory was 121.8MB in the beginning and 119.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.28ms. Allocated memory is still 163.6MB. Free memory was 119.7MB in the beginning and 118.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 921.86ms. Allocated memory is still 163.6MB. Free memory was 118.3MB in the beginning and 106.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10931.59ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 106.1MB in the beginning and 125.3MB in the end (delta: -19.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * Witness Printer took 101.16ms. Allocated memory is still 197.1MB. Free memory was 125.3MB in the beginning and 119.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 109 PlacesBefore, 23 PlacesAfterwards, 111 TransitionsBefore, 19 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 6 FixpointIterations, 65 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 107 TotalNumberOfCompositions, 888 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 746, independent: 716, independent conditional: 0, independent unconditional: 716, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 393, independent: 384, independent conditional: 0, independent unconditional: 384, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 746, independent: 332, independent conditional: 0, independent unconditional: 332, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 393, unknown conditional: 0, unknown unconditional: 393] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-3:0}, N=1, counter=0, t1={5:0}, t2={3:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-3:0}, N=1, counter=0, t1={5:0}, t2={3:0}] [L62] 2 int i=0; VAL [A={-3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L83] 0 \read(t1) VAL [A={-3:0}, N=1, counter=0, t1={5:0}, t2={3:0}] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L49] 1 int i=0; VAL [A={-3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={-3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=-4, i=1, tmp=-4] [L49] COND FALSE 1 !(i