./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme --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 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:52,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:52,166 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:55:52,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:52,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:52,210 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:52,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:52,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:52,213 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:52,218 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:52,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:52,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:52,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:52,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:52,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:52,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:52,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:52,224 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:52,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:52,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:52,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:52,228 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:52,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:52,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:52,229 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:55:52,229 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:55:52,230 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:52,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:52,231 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:52,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:52,233 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:52,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:52,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:52,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:52,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:52,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:52,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:52,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:52,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:52,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:52,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:52,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:52,237 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:52,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:52,238 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_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2023-11-26 11:55:52,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:52,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:52,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:52,602 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:52,603 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:52,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-26 11:55:55,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:55,840 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:55,841 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-26 11:55:55,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/data/28254b646/0f72beaeb5b74b60a0516796d625af57/FLAG91c342abd [2023-11-26 11:55:55,865 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/data/28254b646/0f72beaeb5b74b60a0516796d625af57 [2023-11-26 11:55:55,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:55,869 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:55,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:55,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:55,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:55,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:55" (1/1) ... [2023-11-26 11:55:55,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67215670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:55, skipping insertion in model container [2023-11-26 11:55:55,880 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:55" (1/1) ... [2023-11-26 11:55:55,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:56,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:56,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:56,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:56,132 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:56,133 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:56,140 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:56,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56 WrapperNode [2023-11-26 11:55:56,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:56,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:56,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:56,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:56,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,179 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-11-26 11:55:56,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:56,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:56,180 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:56,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:56,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,215 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 11:55:56,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:56,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:56,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:56,237 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:56,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (1/1) ... [2023-11-26 11:55:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:56,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:56,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:56,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:55:56,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:55:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:55:56,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:55:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:55:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:55:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:56,319 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:55:56,440 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:56,443 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:56,835 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:57,005 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:57,006 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:55:57,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:57 BoogieIcfgContainer [2023-11-26 11:55:57,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:57,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:57,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:57,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:57,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:55" (1/3) ... [2023-11-26 11:55:57,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28542f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:57, skipping insertion in model container [2023-11-26 11:55:57,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:56" (2/3) ... [2023-11-26 11:55:57,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28542f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:57, skipping insertion in model container [2023-11-26 11:55:57,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:57" (3/3) ... [2023-11-26 11:55:57,017 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-26 11:55:57,025 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:57,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:57,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 11:55:57,038 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:57,091 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:55:57,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 11:55:57,163 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-11-26 11:55:57,163 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:55:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-26 11:55:57,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2023-11-26 11:55:57,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2023-11-26 11:55:57,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:57,190 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;@12630d62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:57,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 11:55:57,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:57,199 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-26 11:55:57,199 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:55:57,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:55:57,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:57,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:57,207 INFO L85 PathProgramCache]: Analyzing trace with hash 296733280, now seen corresponding path program 1 times [2023-11-26 11:55:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:57,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284762247] [2023-11-26 11:55:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:57,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284762247] [2023-11-26 11:55:57,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284762247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:57,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:55:57,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22216219] [2023-11-26 11:55:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:55:57,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-26 11:55:57,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:57,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:55:57,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:57,715 INFO L124 PetriNetUnfolderBase]: 127/317 cut-off events. [2023-11-26 11:55:57,716 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-26 11:55:57,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 317 events. 127/317 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1458 event pairs, 44 based on Foata normal form. 8/267 useless extension candidates. Maximal degree in co-relation 487. Up to 175 conditions per place. [2023-11-26 11:55:57,725 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 27 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-26 11:55:57,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 165 flow [2023-11-26 11:55:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-26 11:55:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2023-11-26 11:55:57,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-26 11:55:57,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-26 11:55:57,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:57,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-26 11:55:57,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-11-26 11:55:57,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:55:57,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:55:57,759 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 83 transitions. [2023-11-26 11:55:57,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 165 flow [2023-11-26 11:55:57,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:57,768 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 88 flow [2023-11-26 11:55:57,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-26 11:55:57,775 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-26 11:55:57,776 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 88 flow [2023-11-26 11:55:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-26 11:55:57,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:57,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:57,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:57,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:57,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1692851779, now seen corresponding path program 1 times [2023-11-26 11:55:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222255844] [2023-11-26 11:55:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222255844] [2023-11-26 11:55:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222255844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:57,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:57,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442552657] [2023-11-26 11:55:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:58,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:55:58,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-26 11:55:58,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:58,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:55:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:58,248 INFO L124 PetriNetUnfolderBase]: 212/440 cut-off events. [2023-11-26 11:55:58,248 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-26 11:55:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 440 events. 212/440 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2077 event pairs, 107 based on Foata normal form. 12/389 useless extension candidates. Maximal degree in co-relation 464. Up to 305 conditions per place. [2023-11-26 11:55:58,256 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 38 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-26 11:55:58,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 220 flow [2023-11-26 11:55:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2023-11-26 11:55:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-26 11:55:58,259 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 96 transitions. [2023-11-26 11:55:58,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 96 transitions. [2023-11-26 11:55:58,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:58,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 96 transitions. [2023-11-26 11:55:58,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2023-11-26 11:55:58,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:58,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:58,264 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 88 flow. Second operand 4 states and 96 transitions. [2023-11-26 11:55:58,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 220 flow [2023-11-26 11:55:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:58,267 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 115 flow [2023-11-26 11:55:58,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-26 11:55:58,268 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-11-26 11:55:58,269 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 115 flow [2023-11-26 11:55:58,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-26 11:55:58,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:58,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:58,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:58,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:58,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash 524683319, now seen corresponding path program 1 times [2023-11-26 11:55:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:58,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948201324] [2023-11-26 11:55:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:58,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948201324] [2023-11-26 11:55:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948201324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:58,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:58,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:58,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281123752] [2023-11-26 11:55:58,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:58,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:55:58,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2023-11-26 11:55:58,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:58,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:55:58,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:58,524 INFO L124 PetriNetUnfolderBase]: 224/594 cut-off events. [2023-11-26 11:55:58,524 INFO L125 PetriNetUnfolderBase]: For 144/158 co-relation queries the response was YES. [2023-11-26 11:55:58,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 594 events. 224/594 cut-off events. For 144/158 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3277 event pairs, 59 based on Foata normal form. 18/539 useless extension candidates. Maximal degree in co-relation 405. Up to 148 conditions per place. [2023-11-26 11:55:58,531 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 43 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-11-26 11:55:58,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 292 flow [2023-11-26 11:55:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-26 11:55:58,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.777027027027027 [2023-11-26 11:55:58,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-26 11:55:58,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-26 11:55:58,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:58,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-26 11:55:58,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2023-11-26 11:55:58,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:58,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:58,538 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 115 flow. Second operand 4 states and 115 transitions. [2023-11-26 11:55:58,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 292 flow [2023-11-26 11:55:58,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:58,542 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 170 flow [2023-11-26 11:55:58,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-26 11:55:58,543 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-11-26 11:55:58,544 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 170 flow [2023-11-26 11:55:58,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2023-11-26 11:55:58,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:58,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:58,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:58,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 241680997, now seen corresponding path program 1 times [2023-11-26 11:55:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:58,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776458027] [2023-11-26 11:55:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:58,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776458027] [2023-11-26 11:55:58,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776458027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:58,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283980248] [2023-11-26 11:55:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:58,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:58,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:58,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:58,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:58,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:55:58,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:58,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283980248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:58,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:55:58,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-26 11:55:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279471196] [2023-11-26 11:55:58,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:58,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:58,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:55:58,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-11-26 11:55:58,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:58,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:55:58,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:58,991 INFO L124 PetriNetUnfolderBase]: 250/654 cut-off events. [2023-11-26 11:55:58,992 INFO L125 PetriNetUnfolderBase]: For 632/652 co-relation queries the response was YES. [2023-11-26 11:55:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 654 events. 250/654 cut-off events. For 632/652 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3579 event pairs, 64 based on Foata normal form. 32/638 useless extension candidates. Maximal degree in co-relation 711. Up to 252 conditions per place. [2023-11-26 11:55:58,999 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 32 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-26 11:55:59,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 297 flow [2023-11-26 11:55:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-26 11:55:59,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2023-11-26 11:55:59,004 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-26 11:55:59,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-26 11:55:59,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:59,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-26 11:55:59,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2023-11-26 11:55:59,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:59,008 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:59,008 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 170 flow. Second operand 4 states and 99 transitions. [2023-11-26 11:55:59,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 297 flow [2023-11-26 11:55:59,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 291 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:59,013 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 217 flow [2023-11-26 11:55:59,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-26 11:55:59,015 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-11-26 11:55:59,015 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 217 flow [2023-11-26 11:55:59,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-11-26 11:55:59,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:59,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:59,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:59,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:59,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:59,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1574481257, now seen corresponding path program 1 times [2023-11-26 11:55:59,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:59,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569525826] [2023-11-26 11:55:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569525826] [2023-11-26 11:55:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569525826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:59,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:59,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206724162] [2023-11-26 11:55:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:59,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:55:59,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-26 11:55:59,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:59,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:55:59,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:59,569 INFO L124 PetriNetUnfolderBase]: 549/1175 cut-off events. [2023-11-26 11:55:59,569 INFO L125 PetriNetUnfolderBase]: For 2091/2184 co-relation queries the response was YES. [2023-11-26 11:55:59,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 1175 events. 549/1175 cut-off events. For 2091/2184 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6529 event pairs, 279 based on Foata normal form. 47/1171 useless extension candidates. Maximal degree in co-relation 1076. Up to 710 conditions per place. [2023-11-26 11:55:59,584 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 60 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-26 11:55:59,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 555 flow [2023-11-26 11:55:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-26 11:55:59,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2023-11-26 11:55:59,586 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-26 11:55:59,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-26 11:55:59,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:59,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-26 11:55:59,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2023-11-26 11:55:59,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:59,590 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-26 11:55:59,590 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 217 flow. Second operand 4 states and 95 transitions. [2023-11-26 11:55:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 555 flow [2023-11-26 11:55:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 510 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:59,599 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 225 flow [2023-11-26 11:55:59,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-26 11:55:59,601 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2023-11-26 11:55:59,602 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 225 flow [2023-11-26 11:55:59,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-26 11:55:59,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:59,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:55:59,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:55:59,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 327215368, now seen corresponding path program 1 times [2023-11-26 11:55:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:59,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384811628] [2023-11-26 11:55:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384811628] [2023-11-26 11:55:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384811628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701316743] [2023-11-26 11:55:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:59,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:59,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:59,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:59,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:55:59,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:59,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701316743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:59,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:55:59,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 11:55:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334370904] [2023-11-26 11:55:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:59,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:55:59,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2023-11-26 11:55:59,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:59,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:55:59,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:00,118 INFO L124 PetriNetUnfolderBase]: 489/1023 cut-off events. [2023-11-26 11:56:00,119 INFO L125 PetriNetUnfolderBase]: For 1414/1494 co-relation queries the response was YES. [2023-11-26 11:56:00,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3038 conditions, 1023 events. 489/1023 cut-off events. For 1414/1494 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5537 event pairs, 75 based on Foata normal form. 74/1038 useless extension candidates. Maximal degree in co-relation 1319. Up to 305 conditions per place. [2023-11-26 11:56:00,131 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 68 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-26 11:56:00,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 587 flow [2023-11-26 11:56:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:56:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:56:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-26 11:56:00,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2023-11-26 11:56:00,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-26 11:56:00,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-26 11:56:00,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:00,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-26 11:56:00,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-26 11:56:00,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 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) [2023-11-26 11:56:00,136 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 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) [2023-11-26 11:56:00,137 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 225 flow. Second operand 6 states and 133 transitions. [2023-11-26 11:56:00,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 587 flow [2023-11-26 11:56:00,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:00,161 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 232 flow [2023-11-26 11:56:00,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-26 11:56:00,162 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-11-26 11:56:00,163 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 232 flow [2023-11-26 11:56:00,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2023-11-26 11:56:00,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:00,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:56:00,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:00,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:00,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1553742141, now seen corresponding path program 1 times [2023-11-26 11:56:00,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:00,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493102634] [2023-11-26 11:56:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:00,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493102634] [2023-11-26 11:56:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493102634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535580167] [2023-11-26 11:56:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:00,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:00,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:00,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:56:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:00,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:00,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:00,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535580167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:00,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:00,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:56:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144106452] [2023-11-26 11:56:00,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:00,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:56:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:56:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:56:00,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:56:00,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 232 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 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) [2023-11-26 11:56:00,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:00,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:56:00,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:01,291 INFO L124 PetriNetUnfolderBase]: 1059/2213 cut-off events. [2023-11-26 11:56:01,292 INFO L125 PetriNetUnfolderBase]: For 3885/4061 co-relation queries the response was YES. [2023-11-26 11:56:01,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 2213 events. 1059/2213 cut-off events. For 3885/4061 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12769 event pairs, 211 based on Foata normal form. 162/2360 useless extension candidates. Maximal degree in co-relation 2557. Up to 822 conditions per place. [2023-11-26 11:56:01,321 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 137 selfloop transitions, 13 changer transitions 0/162 dead transitions. [2023-11-26 11:56:01,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 162 transitions, 1181 flow [2023-11-26 11:56:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:56:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:56:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2023-11-26 11:56:01,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297297297297297 [2023-11-26 11:56:01,323 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 233 transitions. [2023-11-26 11:56:01,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 233 transitions. [2023-11-26 11:56:01,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:01,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 233 transitions. [2023-11-26 11:56:01,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.3) internal successors, (233), 10 states have internal predecessors, (233), 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) [2023-11-26 11:56:01,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2023-11-26 11:56:01,327 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2023-11-26 11:56:01,327 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 232 flow. Second operand 10 states and 233 transitions. [2023-11-26 11:56:01,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 162 transitions, 1181 flow [2023-11-26 11:56:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 162 transitions, 1151 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:01,343 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 300 flow [2023-11-26 11:56:01,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-26 11:56:01,346 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-11-26 11:56:01,346 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 300 flow [2023-11-26 11:56:01,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 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) [2023-11-26 11:56:01,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:01,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:01,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:01,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:56:01,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:01,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 440005725, now seen corresponding path program 1 times [2023-11-26 11:56:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136669232] [2023-11-26 11:56:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136669232] [2023-11-26 11:56:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136669232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:01,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:56:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824789980] [2023-11-26 11:56:01,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:01,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2023-11-26 11:56:01,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:56:01,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:01,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2023-11-26 11:56:01,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:01,903 INFO L124 PetriNetUnfolderBase]: 764/1653 cut-off events. [2023-11-26 11:56:01,904 INFO L125 PetriNetUnfolderBase]: For 3506/3619 co-relation queries the response was YES. [2023-11-26 11:56:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1653 events. 764/1653 cut-off events. For 3506/3619 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9582 event pairs, 478 based on Foata normal form. 31/1605 useless extension candidates. Maximal degree in co-relation 3722. Up to 1257 conditions per place. [2023-11-26 11:56:01,925 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 36 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-26 11:56:01,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 372 flow [2023-11-26 11:56:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-26 11:56:01,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-11-26 11:56:01,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-26 11:56:01,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-26 11:56:01,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:01,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-26 11:56:01,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-26 11:56:01,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:56:01,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:56:01,929 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 300 flow. Second operand 3 states and 62 transitions. [2023-11-26 11:56:01,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 372 flow [2023-11-26 11:56:01,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 361 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:01,939 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 289 flow [2023-11-26 11:56:01,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-11-26 11:56:01,940 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-11-26 11:56:01,940 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 289 flow [2023-11-26 11:56:01,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:56:01,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:01,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:01,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:56:01,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:01,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1505819325, now seen corresponding path program 1 times [2023-11-26 11:56:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967234935] [2023-11-26 11:56:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:01,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967234935] [2023-11-26 11:56:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967234935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:56:02,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865370430] [2023-11-26 11:56:02,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:02,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2023-11-26 11:56:02,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:56:02,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:02,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2023-11-26 11:56:02,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:02,299 INFO L124 PetriNetUnfolderBase]: 764/1648 cut-off events. [2023-11-26 11:56:02,299 INFO L125 PetriNetUnfolderBase]: For 3138/3251 co-relation queries the response was YES. [2023-11-26 11:56:02,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 1648 events. 764/1648 cut-off events. For 3138/3251 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9504 event pairs, 478 based on Foata normal form. 31/1600 useless extension candidates. Maximal degree in co-relation 5206. Up to 1252 conditions per place. [2023-11-26 11:56:02,319 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 32 selfloop transitions, 1 changer transitions 5/52 dead transitions. [2023-11-26 11:56:02,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 359 flow [2023-11-26 11:56:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-26 11:56:02,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2023-11-26 11:56:02,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-26 11:56:02,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-26 11:56:02,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:02,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-26 11:56:02,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-26 11:56:02,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:56:02,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-26 11:56:02,323 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 289 flow. Second operand 3 states and 61 transitions. [2023-11-26 11:56:02,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 359 flow [2023-11-26 11:56:02,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:02,333 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 272 flow [2023-11-26 11:56:02,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-11-26 11:56:02,334 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-11-26 11:56:02,334 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 272 flow [2023-11-26 11:56:02,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-26 11:56:02,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:02,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:56:02,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1558719064, now seen corresponding path program 1 times [2023-11-26 11:56:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609083671] [2023-11-26 11:56:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:02,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609083671] [2023-11-26 11:56:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609083671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276705875] [2023-11-26 11:56:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:02,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:02,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:56:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:02,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:02,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:02,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:02,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276705875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:02,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:02,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-26 11:56:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357623503] [2023-11-26 11:56:02,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:02,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:56:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:56:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:56:02,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:56:02,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 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) [2023-11-26 11:56:02,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:02,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:56:02,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:03,040 INFO L124 PetriNetUnfolderBase]: 866/2203 cut-off events. [2023-11-26 11:56:03,041 INFO L125 PetriNetUnfolderBase]: For 4976/5150 co-relation queries the response was YES. [2023-11-26 11:56:03,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 2203 events. 866/2203 cut-off events. For 4976/5150 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 14634 event pairs, 91 based on Foata normal form. 282/2476 useless extension candidates. Maximal degree in co-relation 6534. Up to 410 conditions per place. [2023-11-26 11:56:03,067 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 87 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2023-11-26 11:56:03,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 794 flow [2023-11-26 11:56:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:56:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:56:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2023-11-26 11:56:03,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-11-26 11:56:03,069 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 185 transitions. [2023-11-26 11:56:03,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 185 transitions. [2023-11-26 11:56:03,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:03,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 185 transitions. [2023-11-26 11:56:03,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 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) [2023-11-26 11:56:03,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 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) [2023-11-26 11:56:03,074 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 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) [2023-11-26 11:56:03,074 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 272 flow. Second operand 7 states and 185 transitions. [2023-11-26 11:56:03,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 794 flow [2023-11-26 11:56:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 116 transitions, 793 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:03,091 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 385 flow [2023-11-26 11:56:03,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-11-26 11:56:03,092 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-26 11:56:03,093 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 385 flow [2023-11-26 11:56:03,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 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) [2023-11-26 11:56:03,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:03,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:03,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:56:03,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash -525196980, now seen corresponding path program 1 times [2023-11-26 11:56:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371635846] [2023-11-26 11:56:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:03,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371635846] [2023-11-26 11:56:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371635846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885484513] [2023-11-26 11:56:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:03,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:56:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:03,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:03,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:03,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885484513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:03,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:03,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 11:56:03,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320965281] [2023-11-26 11:56:03,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:03,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:56:03,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:56:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:56:03,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:56:03,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2023-11-26 11:56:03,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:03,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:56:03,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:04,165 INFO L124 PetriNetUnfolderBase]: 1338/2819 cut-off events. [2023-11-26 11:56:04,165 INFO L125 PetriNetUnfolderBase]: For 8370/8545 co-relation queries the response was YES. [2023-11-26 11:56:04,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 2819 events. 1338/2819 cut-off events. For 8370/8545 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17947 event pairs, 216 based on Foata normal form. 124/2799 useless extension candidates. Maximal degree in co-relation 9436. Up to 705 conditions per place. [2023-11-26 11:56:04,202 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 120 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2023-11-26 11:56:04,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 1336 flow [2023-11-26 11:56:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:56:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:56:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2023-11-26 11:56:04,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2023-11-26 11:56:04,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 130 transitions. [2023-11-26 11:56:04,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 130 transitions. [2023-11-26 11:56:04,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:04,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 130 transitions. [2023-11-26 11:56:04,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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) [2023-11-26 11:56:04,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 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) [2023-11-26 11:56:04,207 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 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) [2023-11-26 11:56:04,207 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 385 flow. Second operand 6 states and 130 transitions. [2023-11-26 11:56:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 1336 flow [2023-11-26 11:56:04,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1251 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:04,239 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 368 flow [2023-11-26 11:56:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-11-26 11:56:04,240 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 31 predicate places. [2023-11-26 11:56:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 368 flow [2023-11-26 11:56:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2023-11-26 11:56:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:04,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:04,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:04,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:56:04,447 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:04,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1684455676, now seen corresponding path program 1 times [2023-11-26 11:56:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:04,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548278650] [2023-11-26 11:56:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:04,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548278650] [2023-11-26 11:56:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548278650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677889231] [2023-11-26 11:56:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:04,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:04,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:04,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:56:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:04,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:04,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:04,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:04,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677889231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:04,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:04,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:56:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500570775] [2023-11-26 11:56:04,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:04,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:56:04,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:56:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:56:04,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-26 11:56:04,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 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) [2023-11-26 11:56:04,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:04,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-26 11:56:04,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:05,747 INFO L124 PetriNetUnfolderBase]: 2203/4692 cut-off events. [2023-11-26 11:56:05,748 INFO L125 PetriNetUnfolderBase]: For 13339/13578 co-relation queries the response was YES. [2023-11-26 11:56:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 4692 events. 2203/4692 cut-off events. For 13339/13578 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 30989 event pairs, 482 based on Foata normal form. 252/4900 useless extension candidates. Maximal degree in co-relation 15906. Up to 1600 conditions per place. [2023-11-26 11:56:05,811 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 211 selfloop transitions, 13 changer transitions 6/240 dead transitions. [2023-11-26 11:56:05,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 240 transitions, 2305 flow [2023-11-26 11:56:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:56:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:56:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2023-11-26 11:56:05,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054054054054054 [2023-11-26 11:56:05,814 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 224 transitions. [2023-11-26 11:56:05,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 224 transitions. [2023-11-26 11:56:05,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:05,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 224 transitions. [2023-11-26 11:56:05,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 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) [2023-11-26 11:56:05,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2023-11-26 11:56:05,818 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 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) [2023-11-26 11:56:05,818 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 368 flow. Second operand 10 states and 224 transitions. [2023-11-26 11:56:05,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 240 transitions, 2305 flow [2023-11-26 11:56:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 240 transitions, 2275 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:05,851 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 431 flow [2023-11-26 11:56:05,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=431, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2023-11-26 11:56:05,853 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-11-26 11:56:05,853 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 431 flow [2023-11-26 11:56:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 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) [2023-11-26 11:56:05,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:05,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 11:56:05,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:06,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:06,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1254172511, now seen corresponding path program 1 times [2023-11-26 11:56:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:06,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621059892] [2023-11-26 11:56:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:06,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:06,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621059892] [2023-11-26 11:56:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621059892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593064462] [2023-11-26 11:56:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:06,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:06,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:06,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:56:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:06,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:56:06,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:06,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593064462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:06,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:06,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:56:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497718780] [2023-11-26 11:56:06,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:06,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:56:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:56:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:56:06,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:56:06,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 431 flow. Second operand has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 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) [2023-11-26 11:56:06,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:06,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:56:06,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:08,487 INFO L124 PetriNetUnfolderBase]: 3601/8154 cut-off events. [2023-11-26 11:56:08,488 INFO L125 PetriNetUnfolderBase]: For 30277/30818 co-relation queries the response was YES. [2023-11-26 11:56:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29023 conditions, 8154 events. 3601/8154 cut-off events. For 30277/30818 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 63143 event pairs, 315 based on Foata normal form. 222/8338 useless extension candidates. Maximal degree in co-relation 28994. Up to 1343 conditions per place. [2023-11-26 11:56:08,603 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 221 selfloop transitions, 45 changer transitions 4/286 dead transitions. [2023-11-26 11:56:08,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 286 transitions, 2336 flow [2023-11-26 11:56:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:56:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:56:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 337 transitions. [2023-11-26 11:56:08,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.759009009009009 [2023-11-26 11:56:08,607 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 337 transitions. [2023-11-26 11:56:08,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 337 transitions. [2023-11-26 11:56:08,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:08,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 337 transitions. [2023-11-26 11:56:08,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 28.083333333333332) internal successors, (337), 12 states have internal predecessors, (337), 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) [2023-11-26 11:56:08,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 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) [2023-11-26 11:56:08,612 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 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) [2023-11-26 11:56:08,612 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 431 flow. Second operand 12 states and 337 transitions. [2023-11-26 11:56:08,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 286 transitions, 2336 flow [2023-11-26 11:56:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 286 transitions, 2235 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:08,706 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 924 flow [2023-11-26 11:56:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=924, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2023-11-26 11:56:08,707 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2023-11-26 11:56:08,708 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 924 flow [2023-11-26 11:56:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 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) [2023-11-26 11:56:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:08,709 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-11-26 11:56:08,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:56:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:56:08,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:08,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1132448478, now seen corresponding path program 2 times [2023-11-26 11:56:08,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:08,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901877366] [2023-11-26 11:56:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901877366] [2023-11-26 11:56:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901877366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172414589] [2023-11-26 11:56:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:09,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:09,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:56:09,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:56:09,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:09,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:56:09,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 11:56:09,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 11:56:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172414589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:09,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:09,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-26 11:56:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645866475] [2023-11-26 11:56:09,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:56:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:56:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:56:09,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-26 11:56:09,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 924 flow. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2023-11-26 11:56:09,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:09,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-26 11:56:09,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:12,103 INFO L124 PetriNetUnfolderBase]: 5869/10956 cut-off events. [2023-11-26 11:56:12,104 INFO L125 PetriNetUnfolderBase]: For 52188/52625 co-relation queries the response was YES. [2023-11-26 11:56:12,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 10956 events. 5869/10956 cut-off events. For 52188/52625 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 77063 event pairs, 692 based on Foata normal form. 492/11436 useless extension candidates. Maximal degree in co-relation 41810. Up to 3469 conditions per place. [2023-11-26 11:56:12,278 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 363 selfloop transitions, 16 changer transitions 1/389 dead transitions. [2023-11-26 11:56:12,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 389 transitions, 4454 flow [2023-11-26 11:56:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:56:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 11:56:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 307 transitions. [2023-11-26 11:56:12,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531531531531532 [2023-11-26 11:56:12,281 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 307 transitions. [2023-11-26 11:56:12,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 307 transitions. [2023-11-26 11:56:12,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:12,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 307 transitions. [2023-11-26 11:56:12,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 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) [2023-11-26 11:56:12,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 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) [2023-11-26 11:56:12,285 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 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) [2023-11-26 11:56:12,285 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 924 flow. Second operand 15 states and 307 transitions. [2023-11-26 11:56:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 389 transitions, 4454 flow [2023-11-26 11:56:12,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 389 transitions, 4027 flow, removed 174 selfloop flow, removed 6 redundant places. [2023-11-26 11:56:12,416 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 874 flow [2023-11-26 11:56:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=874, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-11-26 11:56:12,417 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-26 11:56:12,417 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 874 flow [2023-11-26 11:56:12,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2023-11-26 11:56:12,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:12,418 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:12,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:56:12,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:56:12,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:12,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -533340585, now seen corresponding path program 2 times [2023-11-26 11:56:12,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:12,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209328781] [2023-11-26 11:56:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:12,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:12,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209328781] [2023-11-26 11:56:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209328781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:12,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047583628] [2023-11-26 11:56:12,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:12,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:12,963 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:12,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:56:13,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:56:13,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:13,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:56:13,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-26 11:56:13,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-26 11:56:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047583628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:13,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-26 11:56:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057481896] [2023-11-26 11:56:13,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:13,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:56:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:56:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:56:13,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-26 11:56:13,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 874 flow. Second operand has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 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) [2023-11-26 11:56:13,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:13,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-26 11:56:13,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:16,431 INFO L124 PetriNetUnfolderBase]: 7648/14510 cut-off events. [2023-11-26 11:56:16,431 INFO L125 PetriNetUnfolderBase]: For 67187/68717 co-relation queries the response was YES. [2023-11-26 11:56:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54445 conditions, 14510 events. 7648/14510 cut-off events. For 67187/68717 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 106736 event pairs, 472 based on Foata normal form. 1064/15542 useless extension candidates. Maximal degree in co-relation 54406. Up to 2545 conditions per place. [2023-11-26 11:56:16,620 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 536 selfloop transitions, 21 changer transitions 52/619 dead transitions. [2023-11-26 11:56:16,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 619 transitions, 7657 flow [2023-11-26 11:56:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:56:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 11:56:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 312 transitions. [2023-11-26 11:56:16,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2023-11-26 11:56:16,623 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 312 transitions. [2023-11-26 11:56:16,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 312 transitions. [2023-11-26 11:56:16,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:16,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 312 transitions. [2023-11-26 11:56:16,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 20.8) internal successors, (312), 15 states have internal predecessors, (312), 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) [2023-11-26 11:56:16,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 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) [2023-11-26 11:56:16,628 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 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) [2023-11-26 11:56:16,628 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 874 flow. Second operand 15 states and 312 transitions. [2023-11-26 11:56:16,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 619 transitions, 7657 flow [2023-11-26 11:56:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 619 transitions, 7433 flow, removed 52 selfloop flow, removed 14 redundant places. [2023-11-26 11:56:16,851 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 874 flow [2023-11-26 11:56:16,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=874, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-11-26 11:56:16,853 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-26 11:56:16,853 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 874 flow [2023-11-26 11:56:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 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) [2023-11-26 11:56:16,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:16,854 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-26 11:56:16,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:56:17,071 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:17,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1386865153, now seen corresponding path program 2 times [2023-11-26 11:56:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:17,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021836304] [2023-11-26 11:56:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021836304] [2023-11-26 11:56:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021836304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177746637] [2023-11-26 11:56:17,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:17,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:56:17,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:56:17,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:17,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:56:17,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:17,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:17,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177746637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:17,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:17,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-26 11:56:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910582408] [2023-11-26 11:56:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:17,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:56:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:56:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:56:17,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:56:17,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 874 flow. Second operand has 25 states, 25 states have (on average 18.08) internal successors, (452), 25 states have internal predecessors, (452), 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) [2023-11-26 11:56:17,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:17,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:56:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:22,213 INFO L124 PetriNetUnfolderBase]: 8201/19221 cut-off events. [2023-11-26 11:56:22,214 INFO L125 PetriNetUnfolderBase]: For 126326/127984 co-relation queries the response was YES. [2023-11-26 11:56:22,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73411 conditions, 19221 events. 8201/19221 cut-off events. For 126326/127984 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 160626 event pairs, 417 based on Foata normal form. 598/19804 useless extension candidates. Maximal degree in co-relation 73374. Up to 3487 conditions per place. [2023-11-26 11:56:22,743 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 443 selfloop transitions, 205 changer transitions 0/666 dead transitions. [2023-11-26 11:56:22,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 666 transitions, 6594 flow [2023-11-26 11:56:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:56:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:56:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 616 transitions. [2023-11-26 11:56:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2023-11-26 11:56:22,752 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 616 transitions. [2023-11-26 11:56:22,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 616 transitions. [2023-11-26 11:56:22,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:22,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 616 transitions. [2023-11-26 11:56:22,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 25.666666666666668) internal successors, (616), 24 states have internal predecessors, (616), 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) [2023-11-26 11:56:22,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 37.0) internal successors, (925), 25 states have internal predecessors, (925), 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) [2023-11-26 11:56:22,768 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 37.0) internal successors, (925), 25 states have internal predecessors, (925), 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) [2023-11-26 11:56:22,770 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 874 flow. Second operand 24 states and 616 transitions. [2023-11-26 11:56:22,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 666 transitions, 6594 flow [2023-11-26 11:56:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 666 transitions, 5747 flow, removed 118 selfloop flow, removed 15 redundant places. [2023-11-26 11:56:22,962 INFO L231 Difference]: Finished difference. Result has 132 places, 255 transitions, 3310 flow [2023-11-26 11:56:22,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3310, PETRI_PLACES=132, PETRI_TRANSITIONS=255} [2023-11-26 11:56:22,963 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 93 predicate places. [2023-11-26 11:56:22,963 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 255 transitions, 3310 flow [2023-11-26 11:56:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.08) internal successors, (452), 25 states have internal predecessors, (452), 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) [2023-11-26 11:56:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-26 11:56:22,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:56:23,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:23,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 718666945, now seen corresponding path program 3 times [2023-11-26 11:56:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419009266] [2023-11-26 11:56:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419009266] [2023-11-26 11:56:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419009266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168488646] [2023-11-26 11:56:24,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:56:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:24,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:24,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:56:24,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-26 11:56:24,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:24,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:56:24,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:24,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:25,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168488646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:25,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:25,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-26 11:56:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877037963] [2023-11-26 11:56:25,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-26 11:56:25,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-26 11:56:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 11:56:25,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-26 11:56:25,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 255 transitions, 3310 flow. Second operand has 49 states, 49 states have (on average 18.040816326530614) internal successors, (884), 49 states have internal predecessors, (884), 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) [2023-11-26 11:56:25,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:25,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-26 11:56:25,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:39,977 INFO L124 PetriNetUnfolderBase]: 22071/51608 cut-off events. [2023-11-26 11:56:39,977 INFO L125 PetriNetUnfolderBase]: For 826625/829953 co-relation queries the response was YES. [2023-11-26 11:56:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191095 conditions, 51608 events. 22071/51608 cut-off events. For 826625/829953 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 462446 event pairs, 1397 based on Foata normal form. 1520/53113 useless extension candidates. Maximal degree in co-relation 191040. Up to 8679 conditions per place. [2023-11-26 11:56:40,825 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 875 selfloop transitions, 821 changer transitions 0/1714 dead transitions. [2023-11-26 11:56:40,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1714 transitions, 19054 flow [2023-11-26 11:56:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 11:56:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-26 11:56:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1240 transitions. [2023-11-26 11:56:40,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6981981981981982 [2023-11-26 11:56:40,832 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1240 transitions. [2023-11-26 11:56:40,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1240 transitions. [2023-11-26 11:56:40,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:40,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1240 transitions. [2023-11-26 11:56:40,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 25.833333333333332) internal successors, (1240), 48 states have internal predecessors, (1240), 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) [2023-11-26 11:56:40,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 37.0) internal successors, (1813), 49 states have internal predecessors, (1813), 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) [2023-11-26 11:56:40,844 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 37.0) internal successors, (1813), 49 states have internal predecessors, (1813), 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) [2023-11-26 11:56:40,844 INFO L175 Difference]: Start difference. First operand has 132 places, 255 transitions, 3310 flow. Second operand 48 states and 1240 transitions. [2023-11-26 11:56:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1714 transitions, 19054 flow [2023-11-26 11:56:41,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1714 transitions, 17106 flow, removed 951 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:41,729 INFO L231 Difference]: Finished difference. Result has 220 places, 871 transitions, 12966 flow [2023-11-26 11:56:41,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12966, PETRI_PLACES=220, PETRI_TRANSITIONS=871} [2023-11-26 11:56:41,731 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 181 predicate places. [2023-11-26 11:56:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 871 transitions, 12966 flow [2023-11-26 11:56:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 18.040816326530614) internal successors, (884), 49 states have internal predecessors, (884), 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) [2023-11-26 11:56:41,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:41,732 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-26 11:56:41,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:41,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:56:41,938 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:41,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2070827585, now seen corresponding path program 4 times [2023-11-26 11:56:41,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:41,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728622645] [2023-11-26 11:56:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:41,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:44,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728622645] [2023-11-26 11:56:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728622645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783067751] [2023-11-26 11:56:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:56:44,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:44,872 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b92aab-aa24-46b7-9e92-17e1ef6a8bd6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:56:45,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:56:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:45,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 11:56:45,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:45,412 INFO L327 TraceCheckSpWp]: Computing backward predicates...