./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:09,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:09,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:44:09,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:09,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:09,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:09,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:09,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:09,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:09,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:09,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:09,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:09,863 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:09,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:09,866 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:09,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:09,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:09,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:09,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:09,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:09,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:09,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:09,870 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:44:09,871 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:44:09,871 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:09,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:09,872 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:09,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:09,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:09,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:09,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:09,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:09,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:09,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:09,877 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:09,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:09,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:09,878 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:09,878 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:09,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:09,879 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:09,879 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_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-19 07:44:10,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:10,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:10,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:10,277 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:10,278 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:10,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-19 07:44:13,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:13,680 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:13,681 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-19 07:44:13,696 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/data/4b24f7fef/b08085cd38954113b63ce69864ce02bd/FLAGef1df98f0 [2023-11-19 07:44:13,710 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/data/4b24f7fef/b08085cd38954113b63ce69864ce02bd [2023-11-19 07:44:13,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:13,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:13,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:13,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:13,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:13,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf5b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:13, skipping insertion in model container [2023-11-19 07:44:13,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:13" (1/1) ... [2023-11-19 07:44:13,764 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:13,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:13,976 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:14,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:14,016 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:44:14,016 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:44:14,025 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:14,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14 WrapperNode [2023-11-19 07:44:14,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:14,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:14,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:14,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:14,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,081 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 213 [2023-11-19 07:44:14,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:14,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:14,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:14,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:14,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,130 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:14,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:14,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:14,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:14,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (1/1) ... [2023-11-19 07:44:14,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:14,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:14,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:44:14,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:44:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:44:14,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:44:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:44:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:44:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:44:14,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:14,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:14,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:14,314 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:44:14,465 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:14,469 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:14,920 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:15,136 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:15,136 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:44:15,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:15 BoogieIcfgContainer [2023-11-19 07:44:15,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:15,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:15,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:15,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:15,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:13" (1/3) ... [2023-11-19 07:44:15,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53517e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:15, skipping insertion in model container [2023-11-19 07:44:15,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:14" (2/3) ... [2023-11-19 07:44:15,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53517e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:15, skipping insertion in model container [2023-11-19 07:44:15,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:15" (3/3) ... [2023-11-19 07:44:15,151 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-19 07:44:15,160 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:44:15,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:15,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 07:44:15,173 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:44:15,247 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:44:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 190 transitions, 394 flow [2023-11-19 07:44:15,393 INFO L124 PetriNetUnfolderBase]: 13/188 cut-off events. [2023-11-19 07:44:15,393 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:44:15,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 13/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-11-19 07:44:15,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 190 transitions, 394 flow [2023-11-19 07:44:15,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 166 transitions, 341 flow [2023-11-19 07:44:15,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:44:15,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 166 transitions, 341 flow [2023-11-19 07:44:15,437 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 166 transitions, 341 flow [2023-11-19 07:44:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 166 transitions, 341 flow [2023-11-19 07:44:15,542 INFO L124 PetriNetUnfolderBase]: 12/166 cut-off events. [2023-11-19 07:44:15,542 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:44:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 166 events. 12/166 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-11-19 07:44:15,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-11-19 07:44:23,076 INFO L134 LiptonReduction]: Checked pairs total: 998 [2023-11-19 07:44:23,076 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-11-19 07:44:23,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:23,099 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;@5a26b390, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:23,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-19 07:44:23,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:44:23,102 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:44:23,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:44:23,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:23,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:44:23,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:23,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 27750, now seen corresponding path program 1 times [2023-11-19 07:44:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865958541] [2023-11-19 07:44:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:23,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865958541] [2023-11-19 07:44:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865958541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:23,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762731204] [2023-11-19 07:44:23,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:23,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:23,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 366 [2023-11-19 07:44:23,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:23,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 366 [2023-11-19 07:44:23,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:23,669 INFO L124 PetriNetUnfolderBase]: 102/181 cut-off events. [2023-11-19 07:44:23,669 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:44:23,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 181 events. 102/181 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 514 event pairs, 72 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 175 conditions per place. [2023-11-19 07:44:23,676 INFO L140 encePairwiseOnDemand]: 357/366 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-11-19 07:44:23,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 133 flow [2023-11-19 07:44:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-11-19 07:44:23,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781420765027322 [2023-11-19 07:44:23,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-11-19 07:44:23,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-11-19 07:44:23,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:23,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-11-19 07:44:23,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,733 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 59 flow. Second operand 3 states and 525 transitions. [2023-11-19 07:44:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 133 flow [2023-11-19 07:44:23,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:44:23,740 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 110 flow [2023-11-19 07:44:23,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-11-19 07:44:23,748 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-11-19 07:44:23,749 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 110 flow [2023-11-19 07:44:23,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:23,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:44:23,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:44:23,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:23,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash 27751, now seen corresponding path program 1 times [2023-11-19 07:44:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542043916] [2023-11-19 07:44:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:23,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542043916] [2023-11-19 07:44:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542043916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:23,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:44:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509471869] [2023-11-19 07:44:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:23,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:23,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:23,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:23,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 366 [2023-11-19 07:44:23,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:23,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 366 [2023-11-19 07:44:23,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:23,982 INFO L124 PetriNetUnfolderBase]: 100/177 cut-off events. [2023-11-19 07:44:23,982 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:44:23,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 177 events. 100/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 502 event pairs, 72 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 343. Up to 169 conditions per place. [2023-11-19 07:44:23,985 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 24 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-11-19 07:44:23,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 144 flow [2023-11-19 07:44:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-19 07:44:23,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470856102003643 [2023-11-19 07:44:23,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-19 07:44:23,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-19 07:44:23,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:23,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-19 07:44:23,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:23,998 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 110 flow. Second operand 3 states and 517 transitions. [2023-11-19 07:44:23,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 144 flow [2023-11-19 07:44:23,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:24,000 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 86 flow [2023-11-19 07:44:24,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:44:24,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2023-11-19 07:44:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 86 flow [2023-11-19 07:44:24,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:24,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:44:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:44:24,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:24,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash 861774, now seen corresponding path program 1 times [2023-11-19 07:44:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303276513] [2023-11-19 07:44:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303276513] [2023-11-19 07:44:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303276513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133788297] [2023-11-19 07:44:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:24,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:24,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:24,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:24,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:24,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:24,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133788297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:24,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:24,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-19 07:44:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3202101] [2023-11-19 07:44:24,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:44:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:44:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:24,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 366 [2023-11-19 07:44:24,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:24,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 366 [2023-11-19 07:44:24,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:24,562 INFO L124 PetriNetUnfolderBase]: 106/189 cut-off events. [2023-11-19 07:44:24,563 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:44:24,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 189 events. 106/189 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 527 event pairs, 72 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 343. Up to 178 conditions per place. [2023-11-19 07:44:24,568 INFO L140 encePairwiseOnDemand]: 359/366 looper letters, 22 selfloop transitions, 17 changer transitions 0/39 dead transitions. [2023-11-19 07:44:24,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 218 flow [2023-11-19 07:44:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:44:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:44:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1029 transitions. [2023-11-19 07:44:24,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685792349726776 [2023-11-19 07:44:24,573 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1029 transitions. [2023-11-19 07:44:24,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1029 transitions. [2023-11-19 07:44:24,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:24,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1029 transitions. [2023-11-19 07:44:24,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,587 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 86 flow. Second operand 6 states and 1029 transitions. [2023-11-19 07:44:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 218 flow [2023-11-19 07:44:24,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:24,592 INFO L231 Difference]: Finished difference. Result has 33 places, 39 transitions, 198 flow [2023-11-19 07:44:24,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=33, PETRI_TRANSITIONS=39} [2023-11-19 07:44:24,595 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-11-19 07:44:24,595 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 39 transitions, 198 flow [2023-11-19 07:44:24,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:24,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:24,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:44:24,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:24,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:24,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -95181210, now seen corresponding path program 2 times [2023-11-19 07:44:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:24,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274110339] [2023-11-19 07:44:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274110339] [2023-11-19 07:44:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274110339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064215561] [2023-11-19 07:44:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:25,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:25,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:25,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:44:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:25,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:25,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:44:25,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:25,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064215561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:25,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:25,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:44:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073277262] [2023-11-19 07:44:25,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:25,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:25,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 366 [2023-11-19 07:44:25,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 39 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:25,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 366 [2023-11-19 07:44:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:25,261 INFO L124 PetriNetUnfolderBase]: 106/188 cut-off events. [2023-11-19 07:44:25,262 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:44:25,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 188 events. 106/188 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 524 event pairs, 72 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 392. Up to 183 conditions per place. [2023-11-19 07:44:25,264 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 32 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-11-19 07:44:25,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 38 transitions, 264 flow [2023-11-19 07:44:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-19 07:44:25,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47996357012750457 [2023-11-19 07:44:25,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-19 07:44:25,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-19 07:44:25,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:25,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-19 07:44:25,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,274 INFO L175 Difference]: Start difference. First operand has 33 places, 39 transitions, 198 flow. Second operand 3 states and 527 transitions. [2023-11-19 07:44:25,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 38 transitions, 264 flow [2023-11-19 07:44:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 238 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:25,278 INFO L231 Difference]: Finished difference. Result has 33 places, 38 transitions, 174 flow [2023-11-19 07:44:25,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=33, PETRI_TRANSITIONS=38} [2023-11-19 07:44:25,279 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-11-19 07:44:25,279 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 38 transitions, 174 flow [2023-11-19 07:44:25,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:25,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:44:25,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:25,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:44:25,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:25,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -92789408, now seen corresponding path program 1 times [2023-11-19 07:44:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683317350] [2023-11-19 07:44:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683317350] [2023-11-19 07:44:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683317350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:25,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225151617] [2023-11-19 07:44:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:25,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:25,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:25,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:25,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 38 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:25,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:25,695 INFO L124 PetriNetUnfolderBase]: 135/229 cut-off events. [2023-11-19 07:44:25,695 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:44:25,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 229 events. 135/229 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 709 event pairs, 72 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 473. Up to 201 conditions per place. [2023-11-19 07:44:25,699 INFO L140 encePairwiseOnDemand]: 361/366 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-19 07:44:25,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 292 flow [2023-11-19 07:44:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-11-19 07:44:25,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981785063752277 [2023-11-19 07:44:25,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-11-19 07:44:25,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-11-19 07:44:25,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:25,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-11-19 07:44:25,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,711 INFO L175 Difference]: Start difference. First operand has 33 places, 38 transitions, 174 flow. Second operand 3 states and 547 transitions. [2023-11-19 07:44:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 292 flow [2023-11-19 07:44:25,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:25,722 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 183 flow [2023-11-19 07:44:25,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2023-11-19 07:44:25,725 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-19 07:44:25,726 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 183 flow [2023-11-19 07:44:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:25,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:25,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:25,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:44:25,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:25,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1418496487, now seen corresponding path program 1 times [2023-11-19 07:44:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:25,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124963022] [2023-11-19 07:44:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124963022] [2023-11-19 07:44:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124963022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:25,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:25,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478814972] [2023-11-19 07:44:25,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:26,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 366 [2023-11-19 07:44:26,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:26,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 366 [2023-11-19 07:44:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:26,145 INFO L124 PetriNetUnfolderBase]: 163/294 cut-off events. [2023-11-19 07:44:26,145 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-19 07:44:26,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 294 events. 163/294 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 976 event pairs, 111 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 736. Up to 228 conditions per place. [2023-11-19 07:44:26,148 INFO L140 encePairwiseOnDemand]: 359/366 looper letters, 43 selfloop transitions, 3 changer transitions 15/61 dead transitions. [2023-11-19 07:44:26,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 400 flow [2023-11-19 07:44:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:44:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2023-11-19 07:44:26,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651639344262295 [2023-11-19 07:44:26,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2023-11-19 07:44:26,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2023-11-19 07:44:26,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:26,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2023-11-19 07:44:26,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,160 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,160 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 183 flow. Second operand 4 states and 681 transitions. [2023-11-19 07:44:26,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 400 flow [2023-11-19 07:44:26,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 393 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:26,178 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 193 flow [2023-11-19 07:44:26,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2023-11-19 07:44:26,181 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-11-19 07:44:26,181 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 193 flow [2023-11-19 07:44:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:26,182 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:44:26,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:44:26,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:26,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1420695735, now seen corresponding path program 1 times [2023-11-19 07:44:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:26,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035339661] [2023-11-19 07:44:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:26,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035339661] [2023-11-19 07:44:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035339661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:26,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635150317] [2023-11-19 07:44:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:26,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:26,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:26,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:26,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:26,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:44:26,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:26,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635150317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:26,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:26,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:44:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067629523] [2023-11-19 07:44:26,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:44:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:44:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:44:26,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 366 [2023-11-19 07:44:26,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 165.15384615384616) internal successors, (2147), 13 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:26,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 366 [2023-11-19 07:44:26,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:26,797 INFO L124 PetriNetUnfolderBase]: 181/330 cut-off events. [2023-11-19 07:44:26,798 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-19 07:44:26,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 330 events. 181/330 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1185 event pairs, 111 based on Foata normal form. 12/255 useless extension candidates. Maximal degree in co-relation 749. Up to 292 conditions per place. [2023-11-19 07:44:26,801 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 23 selfloop transitions, 41 changer transitions 0/64 dead transitions. [2023-11-19 07:44:26,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 459 flow [2023-11-19 07:44:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:44:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:44:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2036 transitions. [2023-11-19 07:44:26,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46357012750455373 [2023-11-19 07:44:26,810 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2036 transitions. [2023-11-19 07:44:26,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2036 transitions. [2023-11-19 07:44:26,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:26,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2036 transitions. [2023-11-19 07:44:26,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 366.0) internal successors, (4758), 13 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,830 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 366.0) internal successors, (4758), 13 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,830 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 193 flow. Second operand 12 states and 2036 transitions. [2023-11-19 07:44:26,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 459 flow [2023-11-19 07:44:26,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 453 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:26,834 INFO L231 Difference]: Finished difference. Result has 53 places, 64 transitions, 461 flow [2023-11-19 07:44:26,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=461, PETRI_PLACES=53, PETRI_TRANSITIONS=64} [2023-11-19 07:44:26,835 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2023-11-19 07:44:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 64 transitions, 461 flow [2023-11-19 07:44:26,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.15384615384616) internal successors, (2147), 13 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:26,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:26,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:26,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:27,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:27,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:27,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1200635649, now seen corresponding path program 1 times [2023-11-19 07:44:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:27,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454129924] [2023-11-19 07:44:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:27,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454129924] [2023-11-19 07:44:27,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454129924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:27,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:27,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:44:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193780975] [2023-11-19 07:44:27,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:27,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:44:27,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 366 [2023-11-19 07:44:27,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:27,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 366 [2023-11-19 07:44:27,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:27,387 INFO L124 PetriNetUnfolderBase]: 227/438 cut-off events. [2023-11-19 07:44:27,388 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-19 07:44:27,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 438 events. 227/438 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1809 event pairs, 159 based on Foata normal form. 16/384 useless extension candidates. Maximal degree in co-relation 1225. Up to 318 conditions per place. [2023-11-19 07:44:27,392 INFO L140 encePairwiseOnDemand]: 359/366 looper letters, 51 selfloop transitions, 12 changer transitions 11/74 dead transitions. [2023-11-19 07:44:27,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 637 flow [2023-11-19 07:44:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:44:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 678 transitions. [2023-11-19 07:44:27,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46311475409836067 [2023-11-19 07:44:27,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 678 transitions. [2023-11-19 07:44:27,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 678 transitions. [2023-11-19 07:44:27,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:27,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 678 transitions. [2023-11-19 07:44:27,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,404 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 461 flow. Second operand 4 states and 678 transitions. [2023-11-19 07:44:27,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 637 flow [2023-11-19 07:44:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 513 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-19 07:44:27,413 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 364 flow [2023-11-19 07:44:27,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=52, PETRI_TRANSITIONS=63} [2023-11-19 07:44:27,415 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2023-11-19 07:44:27,416 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 364 flow [2023-11-19 07:44:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:27,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:27,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:44:27,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:27,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1500978839, now seen corresponding path program 1 times [2023-11-19 07:44:27,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835826613] [2023-11-19 07:44:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835826613] [2023-11-19 07:44:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835826613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082122895] [2023-11-19 07:44:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:27,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:27,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:27,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:27,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:27,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082122895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:27,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:27,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 07:44:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172947516] [2023-11-19 07:44:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:27,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:27,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:27,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:27,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:27,834 INFO L124 PetriNetUnfolderBase]: 162/299 cut-off events. [2023-11-19 07:44:27,834 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-19 07:44:27,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 299 events. 162/299 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1098 event pairs, 42 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 863. Up to 184 conditions per place. [2023-11-19 07:44:27,837 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-11-19 07:44:27,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 576 flow [2023-11-19 07:44:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:44:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-11-19 07:44:27,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49453551912568305 [2023-11-19 07:44:27,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-11-19 07:44:27,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-11-19 07:44:27,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:27,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-11-19 07:44:27,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,849 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 364 flow. Second operand 4 states and 724 transitions. [2023-11-19 07:44:27,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 576 flow [2023-11-19 07:44:27,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 529 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-19 07:44:27,855 INFO L231 Difference]: Finished difference. Result has 50 places, 62 transitions, 333 flow [2023-11-19 07:44:27,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=50, PETRI_TRANSITIONS=62} [2023-11-19 07:44:27,856 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-11-19 07:44:27,856 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 62 transitions, 333 flow [2023-11-19 07:44:27,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:27,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:27,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:28,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:28,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1500978841, now seen corresponding path program 1 times [2023-11-19 07:44:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:28,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367752850] [2023-11-19 07:44:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367752850] [2023-11-19 07:44:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367752850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165932960] [2023-11-19 07:44:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:28,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:28,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:28,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:28,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:28,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:28,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165932960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:28,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:28,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:44:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341199239] [2023-11-19 07:44:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:28,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:44:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:44:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:28,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:28,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:28,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:28,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:28,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:28,497 INFO L124 PetriNetUnfolderBase]: 249/422 cut-off events. [2023-11-19 07:44:28,497 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-11-19 07:44:28,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 422 events. 249/422 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1488 event pairs, 72 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 1244. Up to 290 conditions per place. [2023-11-19 07:44:28,502 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 91 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2023-11-19 07:44:28,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 100 transitions, 659 flow [2023-11-19 07:44:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:44:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:44:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1090 transitions. [2023-11-19 07:44:28,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49635701275045535 [2023-11-19 07:44:28,507 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1090 transitions. [2023-11-19 07:44:28,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1090 transitions. [2023-11-19 07:44:28,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:28,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1090 transitions. [2023-11-19 07:44:28,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.66666666666666) internal successors, (1090), 6 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:28,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:28,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:28,519 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 333 flow. Second operand 6 states and 1090 transitions. [2023-11-19 07:44:28,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 100 transitions, 659 flow [2023-11-19 07:44:28,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:28,525 INFO L231 Difference]: Finished difference. Result has 56 places, 68 transitions, 391 flow [2023-11-19 07:44:28,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=56, PETRI_TRANSITIONS=68} [2023-11-19 07:44:28,527 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2023-11-19 07:44:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 68 transitions, 391 flow [2023-11-19 07:44:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:28,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:28,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:28,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:28,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:44:28,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:28,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash -712746499, now seen corresponding path program 1 times [2023-11-19 07:44:28,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:28,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876272526] [2023-11-19 07:44:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:28,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876272526] [2023-11-19 07:44:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876272526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:28,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:28,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69996927] [2023-11-19 07:44:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:28,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:28,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 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) [2023-11-19 07:44:28,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:28,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:28,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:28,989 INFO L124 PetriNetUnfolderBase]: 301/492 cut-off events. [2023-11-19 07:44:28,989 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2023-11-19 07:44:28,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1738 conditions, 492 events. 301/492 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1625 event pairs, 132 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 1636. Up to 424 conditions per place. [2023-11-19 07:44:28,995 INFO L140 encePairwiseOnDemand]: 361/366 looper letters, 82 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-11-19 07:44:28,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 664 flow [2023-11-19 07:44:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-11-19 07:44:28,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49635701275045535 [2023-11-19 07:44:29,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-11-19 07:44:29,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-11-19 07:44:29,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:29,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-11-19 07:44:29,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,008 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 391 flow. Second operand 3 states and 545 transitions. [2023-11-19 07:44:29,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 664 flow [2023-11-19 07:44:29,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 85 transitions, 622 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:29,016 INFO L231 Difference]: Finished difference. Result has 58 places, 70 transitions, 393 flow [2023-11-19 07:44:29,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=58, PETRI_TRANSITIONS=70} [2023-11-19 07:44:29,018 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2023-11-19 07:44:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 70 transitions, 393 flow [2023-11-19 07:44:29,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 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) [2023-11-19 07:44:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:44:29,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:29,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -620302544, now seen corresponding path program 1 times [2023-11-19 07:44:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:29,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100296260] [2023-11-19 07:44:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100296260] [2023-11-19 07:44:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100296260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:29,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284465829] [2023-11-19 07:44:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:29,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:29,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 70 transitions, 393 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:29,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:29,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:29,230 INFO L124 PetriNetUnfolderBase]: 267/440 cut-off events. [2023-11-19 07:44:29,230 INFO L125 PetriNetUnfolderBase]: For 511/511 co-relation queries the response was YES. [2023-11-19 07:44:29,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 440 events. 267/440 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1445 event pairs, 60 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1488. Up to 250 conditions per place. [2023-11-19 07:44:29,235 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 81 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-19 07:44:29,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 84 transitions, 631 flow [2023-11-19 07:44:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-19 07:44:29,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49271402550091076 [2023-11-19 07:44:29,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-19 07:44:29,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-19 07:44:29,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:29,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-19 07:44:29,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,246 INFO L175 Difference]: Start difference. First operand has 58 places, 70 transitions, 393 flow. Second operand 3 states and 541 transitions. [2023-11-19 07:44:29,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 84 transitions, 631 flow [2023-11-19 07:44:29,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 626 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:44:29,253 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 388 flow [2023-11-19 07:44:29,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2023-11-19 07:44:29,254 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2023-11-19 07:44:29,254 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 388 flow [2023-11-19 07:44:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:29,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:44:29,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:29,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -620302528, now seen corresponding path program 1 times [2023-11-19 07:44:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402547997] [2023-11-19 07:44:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402547997] [2023-11-19 07:44:29,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402547997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:29,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929403210] [2023-11-19 07:44:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:29,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:29,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:29,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:29,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:29,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:29,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:29,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929403210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:29,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:29,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:44:29,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711788501] [2023-11-19 07:44:29,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:29,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:44:29,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:44:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:29,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 366 [2023-11-19 07:44:29,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 388 flow. Second operand has 7 states, 7 states have (on average 173.28571428571428) internal successors, (1213), 7 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:29,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 366 [2023-11-19 07:44:29,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:29,731 INFO L124 PetriNetUnfolderBase]: 423/650 cut-off events. [2023-11-19 07:44:29,732 INFO L125 PetriNetUnfolderBase]: For 774/774 co-relation queries the response was YES. [2023-11-19 07:44:29,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2374 conditions, 650 events. 423/650 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2068 event pairs, 108 based on Foata normal form. 0/627 useless extension candidates. Maximal degree in co-relation 2270. Up to 426 conditions per place. [2023-11-19 07:44:29,740 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 126 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2023-11-19 07:44:29,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 135 transitions, 998 flow [2023-11-19 07:44:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:44:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:44:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1085 transitions. [2023-11-19 07:44:29,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49408014571949 [2023-11-19 07:44:29,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1085 transitions. [2023-11-19 07:44:29,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1085 transitions. [2023-11-19 07:44:29,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:29,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1085 transitions. [2023-11-19 07:44:29,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.83333333333334) internal successors, (1085), 6 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,759 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 388 flow. Second operand 6 states and 1085 transitions. [2023-11-19 07:44:29,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 135 transitions, 998 flow [2023-11-19 07:44:29,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 135 transitions, 986 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:44:29,771 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 449 flow [2023-11-19 07:44:29,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2023-11-19 07:44:29,772 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2023-11-19 07:44:29,773 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 449 flow [2023-11-19 07:44:29,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.28571428571428) internal successors, (1213), 7 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:29,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:29,775 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:29,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:29,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:44:29,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:29,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash 756907122, now seen corresponding path program 2 times [2023-11-19 07:44:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:29,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299086030] [2023-11-19 07:44:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299086030] [2023-11-19 07:44:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299086030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:30,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107522710] [2023-11-19 07:44:30,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:30,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:30,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:30,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:30,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:44:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:30,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:30,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:44:30,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107522710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:30,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:30,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-19 07:44:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236291833] [2023-11-19 07:44:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:30,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 366 [2023-11-19 07:44:30,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:30,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:30,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 366 [2023-11-19 07:44:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:30,426 INFO L124 PetriNetUnfolderBase]: 358/551 cut-off events. [2023-11-19 07:44:30,426 INFO L125 PetriNetUnfolderBase]: For 875/875 co-relation queries the response was YES. [2023-11-19 07:44:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 551 events. 358/551 cut-off events. For 875/875 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1660 event pairs, 168 based on Foata normal form. 32/578 useless extension candidates. Maximal degree in co-relation 2058. Up to 551 conditions per place. [2023-11-19 07:44:30,430 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 34 selfloop transitions, 1 changer transitions 38/73 dead transitions. [2023-11-19 07:44:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 573 flow [2023-11-19 07:44:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-11-19 07:44:30,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48816029143898 [2023-11-19 07:44:30,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-11-19 07:44:30,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-11-19 07:44:30,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:30,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-11-19 07:44:30,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:30,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:30,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:30,439 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 449 flow. Second operand 3 states and 536 transitions. [2023-11-19 07:44:30,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 573 flow [2023-11-19 07:44:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 520 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-19 07:44:30,448 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 220 flow [2023-11-19 07:44:30,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-11-19 07:44:30,448 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-11-19 07:44:30,449 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 220 flow [2023-11-19 07:44:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:30,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:44:30,449 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-19 07:44:30,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:30,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:30,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-19 07:44:30,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -500259913, now seen corresponding path program 2 times [2023-11-19 07:44:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333970011] [2023-11-19 07:44:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:30,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:30,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333970011] [2023-11-19 07:44:30,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333970011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201767002] [2023-11-19 07:44:30,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:30,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:30,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:30,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:31,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:44:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:31,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:31,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:44:31,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:31,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201767002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:31,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:31,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-19 07:44:31,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255384116] [2023-11-19 07:44:31,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:31,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:31,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:44:31,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 366 [2023-11-19 07:44:31,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:31,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 366 [2023-11-19 07:44:31,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:44:31,107 INFO L124 PetriNetUnfolderBase]: 12/45 cut-off events. [2023-11-19 07:44:31,108 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-19 07:44:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 45 events. 12/45 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 176. Up to 45 conditions per place. [2023-11-19 07:44:31,108 INFO L140 encePairwiseOnDemand]: 364/366 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-11-19 07:44:31,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 266 flow [2023-11-19 07:44:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:44:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-19 07:44:31,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581056466302368 [2023-11-19 07:44:31,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-19 07:44:31,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-19 07:44:31,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:44:31,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-19 07:44:31,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,118 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 220 flow. Second operand 3 states and 503 transitions. [2023-11-19 07:44:31,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 266 flow [2023-11-19 07:44:31,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 34 transitions, 202 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-11-19 07:44:31,120 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-11-19 07:44:31,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-11-19 07:44:31,122 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-11-19 07:44:31,122 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-11-19 07:44:31,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:31,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 14 remaining) [2023-11-19 07:44:31,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 14 remaining) [2023-11-19 07:44:31,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 14 remaining) [2023-11-19 07:44:31,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 14 remaining) [2023-11-19 07:44:31,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 14 remaining) [2023-11-19 07:44:31,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 14 remaining) [2023-11-19 07:44:31,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 14 remaining) [2023-11-19 07:44:31,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 14 remaining) [2023-11-19 07:44:31,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2023-11-19 07:44:31,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2023-11-19 07:44:31,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 14 remaining) [2023-11-19 07:44:31,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 14 remaining) [2023-11-19 07:44:31,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 14 remaining) [2023-11-19 07:44:31,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 14 remaining) [2023-11-19 07:44:31,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:44:31,341 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:31,346 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 07:44:31,347 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:44:31,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:44:31 BasicIcfg [2023-11-19 07:44:31,350 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:44:31,351 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:44:31,351 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:44:31,351 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:44:31,352 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:15" (3/4) ... [2023-11-19 07:44:31,353 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:44:31,356 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-19 07:44:31,356 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-19 07:44:31,363 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2023-11-19 07:44:31,363 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 07:44:31,364 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 07:44:31,364 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:44:31,458 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:44:31,459 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:44:31,459 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:44:31,459 INFO L158 Benchmark]: Toolchain (without parser) took 17744.71ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 117.3MB in the beginning and 108.7MB in the end (delta: 8.6MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,460 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:44:31,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.54ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 105.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.56ms. Allocated memory is still 153.1MB. Free memory was 105.5MB in the beginning and 103.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,461 INFO L158 Benchmark]: Boogie Preprocessor took 55.84ms. Allocated memory is still 153.1MB. Free memory was 103.4MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,461 INFO L158 Benchmark]: RCFGBuilder took 1001.27ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 86.4MB in the end (delta: 14.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,462 INFO L158 Benchmark]: TraceAbstraction took 16207.20ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 85.7MB in the beginning and 115.0MB in the end (delta: -29.3MB). Peak memory consumption was 40.6MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,462 INFO L158 Benchmark]: Witness Printer took 107.87ms. Allocated memory is still 222.3MB. Free memory was 115.0MB in the beginning and 108.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-19 07:44:31,464 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.54ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 105.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.56ms. Allocated memory is still 153.1MB. Free memory was 105.5MB in the beginning and 103.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.84ms. Allocated memory is still 153.1MB. Free memory was 103.4MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1001.27ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 86.4MB in the end (delta: 14.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16207.20ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 85.7MB in the beginning and 115.0MB in the end (delta: -29.3MB). Peak memory consumption was 40.6MB. Max. memory is 16.1GB. * Witness Printer took 107.87ms. Allocated memory is still 222.3MB. Free memory was 115.0MB in the beginning and 108.7MB 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.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.6s, 161 PlacesBefore, 28 PlacesAfterwards, 166 TransitionsBefore, 25 TransitionsAfterwards, 992 CoEnabledTransitionPairs, 7 FixpointIterations, 112 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 4 ConcurrentYvCompositions, 8 ChoiceCompositions, 176 TotalNumberOfCompositions, 998 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 908, independent: 893, independent conditional: 0, independent unconditional: 893, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 512, independent: 504, independent conditional: 0, independent unconditional: 504, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 908, independent: 389, independent conditional: 0, independent unconditional: 389, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 512, unknown conditional: 0, unknown unconditional: 512] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 22, Positive conditional cache size: 0, Positive unconditional cache size: 22, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 47]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 47]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 98]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 98]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 98]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 98]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 210 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.1s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 814 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 510 mSDsluCounter, 124 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 73 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1454 IncrementalHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 51 mSDtfsCounter, 1454 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=461occurred in iteration=7, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 186 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 418 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1100 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 104/219 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-19 07:44:31,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f24c645-39cd-4ab0-9fe0-776fc8f7f4cf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE