./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl --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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:34,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:34,810 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:13:34,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:34,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:34,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:34,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:34,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:34,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:34,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:34,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:34,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:34,845 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:34,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:34,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:13:34,846 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:34,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:13:34,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:34,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:34,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:13:34,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:34,850 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:13:34,851 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:13:34,851 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:13:34,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:34,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:13:34,863 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:34,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:34,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:34,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:34,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:34,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:34,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:34,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:13:34,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:13:34,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:13:34,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:34,868 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:13:34,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:34,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:34,869 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:34,876 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_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2023-11-12 02:13:35,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:35,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:35,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:35,185 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:35,186 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:35,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-12 02:13:38,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:38,643 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:38,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-12 02:13:38,654 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/data/84d391512/4eeb3147898346fc84cf4e22061d260c/FLAG6a83dce6a [2023-11-12 02:13:38,670 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/data/84d391512/4eeb3147898346fc84cf4e22061d260c [2023-11-12 02:13:38,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:38,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:38,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:38,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:38,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:38,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:38" (1/1) ... [2023-11-12 02:13:38,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ed551d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:38, skipping insertion in model container [2023-11-12 02:13:38,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:38" (1/1) ... [2023-11-12 02:13:38,718 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:38,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:38,961 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:39,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:39,031 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:13:39,032 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:13:39,040 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:39,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39 WrapperNode [2023-11-12 02:13:39,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:39,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:39,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:39,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:39,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,107 INFO L138 Inliner]: procedures = 27, calls = 84, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 410 [2023-11-12 02:13:39,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:39,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:39,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:39,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:39,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:39,172 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:39,172 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:39,172 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:39,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (1/1) ... [2023-11-12 02:13:39,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:39,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:39,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:13:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:13:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:13:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:13:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:13:39,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:13:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:13:39,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:13:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:13:39,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:13:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:13:39,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:13:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:13:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:13:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:13:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:13:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:13:39,300 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:13:39,455 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:39,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:40,207 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:40,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:40,877 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-12 02:13:40,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:40 BoogieIcfgContainer [2023-11-12 02:13:40,881 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:40,885 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:40,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:40,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:40,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:38" (1/3) ... [2023-11-12 02:13:40,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cd4d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:40, skipping insertion in model container [2023-11-12 02:13:40,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:39" (2/3) ... [2023-11-12 02:13:40,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cd4d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:40, skipping insertion in model container [2023-11-12 02:13:40,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:40" (3/3) ... [2023-11-12 02:13:40,895 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-11-12 02:13:40,908 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:13:40,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:40,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-12 02:13:40,920 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:13:41,196 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:13:41,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 316 transitions, 660 flow [2023-11-12 02:13:41,489 INFO L124 PetriNetUnfolderBase]: 22/312 cut-off events. [2023-11-12 02:13:41,489 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:13:41,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 312 events. 22/312 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 321 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-11-12 02:13:41,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 316 transitions, 660 flow [2023-11-12 02:13:41,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 286 transitions, 593 flow [2023-11-12 02:13:41,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:13:41,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 286 transitions, 593 flow [2023-11-12 02:13:41,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 286 transitions, 593 flow [2023-11-12 02:13:41,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 286 transitions, 593 flow [2023-11-12 02:13:41,641 INFO L124 PetriNetUnfolderBase]: 21/286 cut-off events. [2023-11-12 02:13:41,641 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:13:41,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 286 events. 21/286 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 324 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-11-12 02:13:41,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 4876 [2023-11-12 02:14:03,276 INFO L134 LiptonReduction]: Checked pairs total: 7574 [2023-11-12 02:14:03,277 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-11-12 02:14:03,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:03,297 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;@1fe72dfd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:03,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-11-12 02:14:03,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:14:03,300 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-12 02:14:03,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:14:03,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:03,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:14:03,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-12 02:14:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 53895, now seen corresponding path program 1 times [2023-11-12 02:14:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:03,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474160989] [2023-11-12 02:14:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:03,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474160989] [2023-11-12 02:14:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474160989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:03,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:03,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:14:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712689499] [2023-11-12 02:14:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:03,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 610 [2023-11-12 02:14:03,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:03,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 610 [2023-11-12 02:14:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:09,297 INFO L124 PetriNetUnfolderBase]: 21231/27866 cut-off events. [2023-11-12 02:14:09,298 INFO L125 PetriNetUnfolderBase]: For 1673/1673 co-relation queries the response was YES. [2023-11-12 02:14:09,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56326 conditions, 27866 events. 21231/27866 cut-off events. For 1673/1673 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 139158 event pairs, 18459 based on Foata normal form. 0/11920 useless extension candidates. Maximal degree in co-relation 47390. Up to 27262 conditions per place. [2023-11-12 02:14:09,728 INFO L140 encePairwiseOnDemand]: 586/610 looper letters, 53 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-11-12 02:14:09,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 265 flow [2023-11-12 02:14:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2023-11-12 02:14:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44699453551912566 [2023-11-12 02:14:09,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2023-11-12 02:14:09,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2023-11-12 02:14:09,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:09,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2023-11-12 02:14:09,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,785 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 155 flow. Second operand 3 states and 818 transitions. [2023-11-12 02:14:09,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 265 flow [2023-11-12 02:14:09,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 252 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-12 02:14:09,878 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 184 flow [2023-11-12 02:14:09,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-11-12 02:14:09,885 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-11-12 02:14:09,885 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 184 flow [2023-11-12 02:14:09,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:09,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:14:09,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:14:09,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-12 02:14:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1672405, now seen corresponding path program 1 times [2023-11-12 02:14:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634485138] [2023-11-12 02:14:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634485138] [2023-11-12 02:14:10,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634485138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397027615] [2023-11-12 02:14:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:10,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:10,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:10,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:10,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397027615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:10,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:10,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:14:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879475760] [2023-11-12 02:14:10,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:10,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:10,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:10,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 610 [2023-11-12 02:14:10,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 248.14285714285714) internal successors, (1737), 7 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:10,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:10,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 610 [2023-11-12 02:14:10,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:15,467 INFO L124 PetriNetUnfolderBase]: 21249/27893 cut-off events. [2023-11-12 02:14:15,468 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2023-11-12 02:14:15,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55825 conditions, 27893 events. 21249/27893 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 139302 event pairs, 18459 based on Foata normal form. 0/11939 useless extension candidates. Maximal degree in co-relation 55670. Up to 27262 conditions per place. [2023-11-12 02:14:15,735 INFO L140 encePairwiseOnDemand]: 597/610 looper letters, 50 selfloop transitions, 37 changer transitions 0/89 dead transitions. [2023-11-12 02:14:15,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 478 flow [2023-11-12 02:14:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:14:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1825 transitions. [2023-11-12 02:14:15,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274004683840749 [2023-11-12 02:14:15,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1825 transitions. [2023-11-12 02:14:15,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1825 transitions. [2023-11-12 02:14:15,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:15,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1825 transitions. [2023-11-12 02:14:15,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 260.7142857142857) internal successors, (1825), 7 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,781 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 184 flow. Second operand 7 states and 1825 transitions. [2023-11-12 02:14:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 478 flow [2023-11-12 02:14:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:14:15,787 INFO L231 Difference]: Finished difference. Result has 66 places, 89 transitions, 414 flow [2023-11-12 02:14:15,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=66, PETRI_TRANSITIONS=89} [2023-11-12 02:14:15,788 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2023-11-12 02:14:15,789 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 89 transitions, 414 flow [2023-11-12 02:14:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.14285714285714) internal successors, (1737), 7 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:15,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-12 02:14:15,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:16,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:16,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-12 02:14:16,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 51846214, now seen corresponding path program 1 times [2023-11-12 02:14:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:16,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844003599] [2023-11-12 02:14:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:16,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844003599] [2023-11-12 02:14:16,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844003599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169690583] [2023-11-12 02:14:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:16,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:16,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:16,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:16,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:14:16,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:16,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169690583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:16,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 02:14:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46667322] [2023-11-12 02:14:16,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:16,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:16,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 610 [2023-11-12 02:14:16,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 89 transitions, 414 flow. Second operand has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:16,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:16,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 610 [2023-11-12 02:14:16,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:20,225 INFO L124 PetriNetUnfolderBase]: 21240/27881 cut-off events. [2023-11-12 02:14:20,226 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2023-11-12 02:14:20,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55835 conditions, 27881 events. 21240/27881 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 139315 event pairs, 18459 based on Foata normal form. 0/11941 useless extension candidates. Maximal degree in co-relation 55741. Up to 27253 conditions per place. [2023-11-12 02:14:20,481 INFO L140 encePairwiseOnDemand]: 600/610 looper letters, 55 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2023-11-12 02:14:20,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 483 flow [2023-11-12 02:14:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:14:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1304 transitions. [2023-11-12 02:14:20,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275409836065574 [2023-11-12 02:14:20,489 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1304 transitions. [2023-11-12 02:14:20,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1304 transitions. [2023-11-12 02:14:20,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:20,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1304 transitions. [2023-11-12 02:14:20,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.8) internal successors, (1304), 5 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,510 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,510 INFO L175 Difference]: Start difference. First operand has 66 places, 89 transitions, 414 flow. Second operand 5 states and 1304 transitions. [2023-11-12 02:14:20,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 483 flow [2023-11-12 02:14:20,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 446 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-12 02:14:20,519 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 336 flow [2023-11-12 02:14:20,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2023-11-12 02:14:20,522 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2023-11-12 02:14:20,522 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 336 flow [2023-11-12 02:14:20,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:20,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:20,524 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:14:20,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:14:20,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:20,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-12 02:14:20,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1715341817, now seen corresponding path program 2 times [2023-11-12 02:14:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:20,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606699937] [2023-11-12 02:14:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606699937] [2023-11-12 02:14:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606699937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248229698] [2023-11-12 02:14:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:20,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:20,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:20,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:21,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:14:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:21,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:21,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:14:21,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:21,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248229698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:21,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:21,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-12 02:14:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077533887] [2023-11-12 02:14:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:21,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:21,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:14:21,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 610 [2023-11-12 02:14:21,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:21,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 610 [2023-11-12 02:14:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:25,004 INFO L124 PetriNetUnfolderBase]: 21240/27880 cut-off events. [2023-11-12 02:14:25,004 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-12 02:14:25,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55829 conditions, 27880 events. 21240/27880 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 139196 event pairs, 18459 based on Foata normal form. 1/11947 useless extension candidates. Maximal degree in co-relation 55745. Up to 27275 conditions per place. [2023-11-12 02:14:25,266 INFO L140 encePairwiseOnDemand]: 607/610 looper letters, 68 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-12 02:14:25,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 474 flow [2023-11-12 02:14:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 810 transitions. [2023-11-12 02:14:25,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-11-12 02:14:25,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 810 transitions. [2023-11-12 02:14:25,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 810 transitions. [2023-11-12 02:14:25,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:25,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 810 transitions. [2023-11-12 02:14:25,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,285 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 336 flow. Second operand 3 states and 810 transitions. [2023-11-12 02:14:25,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 474 flow [2023-11-12 02:14:25,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 446 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:14:25,290 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 310 flow [2023-11-12 02:14:25,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2023-11-12 02:14:25,293 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-11-12 02:14:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 310 flow [2023-11-12 02:14:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:25,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-12 02:14:25,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-12 02:14:25,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1101576308, now seen corresponding path program 1 times [2023-11-12 02:14:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418993347] [2023-11-12 02:14:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418993347] [2023-11-12 02:14:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418993347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:25,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528664359] [2023-11-12 02:14:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:25,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:25,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf0595d8-c66a-4d8a-a287-45e22e5b573f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:25,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:25,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:25,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528664359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:25,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:25,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:14:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577096523] [2023-11-12 02:14:25,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:25,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:14:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:14:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:26,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 610 [2023-11-12 02:14:26,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 248.15384615384616) internal successors, (3226), 13 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:26,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:26,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 610 [2023-11-12 02:14:26,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand