./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:44:45,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:44:45,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:44:45,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:44:45,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:44:45,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:44:45,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:44:45,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:44:45,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:44:45,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:44:45,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:44:45,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:44:45,274 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:44:45,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:44:45,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:44:45,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:44:45,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:44:45,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:44:45,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:44:45,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:44:45,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:44:45,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:44:45,280 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:44:45,281 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:44:45,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:44:45,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:44:45,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:44:45,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:44:45,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:44:45,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:44:45,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:44:45,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:44:45,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:44:45,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:44:45,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:44:45,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:44:45,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:44:45,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:44:45,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:44:45,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:44:45,289 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:44:45,290 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_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2023-11-06 22:44:45,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:44:45,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:44:45,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:44:45,657 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:44:45,657 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:44:45,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:44:48,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:44:49,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:44:49,040 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-06 22:44:49,049 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/data/5c383b9ae/c96ccde937014bad9570c552b6f67ca9/FLAGb64811360 [2023-11-06 22:44:49,064 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/data/5c383b9ae/c96ccde937014bad9570c552b6f67ca9 [2023-11-06 22:44:49,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:44:49,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:44:49,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:44:49,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:44:49,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:44:49,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d067d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49, skipping insertion in model container [2023-11-06 22:44:49,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,107 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:44:49,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:44:49,334 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:44:49,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:44:49,371 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:44:49,371 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:44:49,379 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:44:49,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49 WrapperNode [2023-11-06 22:44:49,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:44:49,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:44:49,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:44:49,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:44:49,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,426 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 226 [2023-11-06 22:44:49,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:44:49,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:44:49,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:44:49,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:44:49,438 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:44:49,467 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:44:49,467 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:44:49,467 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:44:49,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (1/1) ... [2023-11-06 22:44:49,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:44:49,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:49,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:44:49,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:44:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:44:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:44:49,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:44:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:44:49,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:44:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:44:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:44:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:44:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:44:49,567 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:44:49,676 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:44:49,677 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:44:50,098 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:44:50,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:44:50,287 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:44:50,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:50 BoogieIcfgContainer [2023-11-06 22:44:50,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:44:50,296 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:44:50,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:44:50,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:44:50,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:49" (1/3) ... [2023-11-06 22:44:50,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48728417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:50, skipping insertion in model container [2023-11-06 22:44:50,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:49" (2/3) ... [2023-11-06 22:44:50,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48728417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:50, skipping insertion in model container [2023-11-06 22:44:50,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:50" (3/3) ... [2023-11-06 22:44:50,303 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-11-06 22:44:50,310 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:44:50,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:44:50,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 22:44:50,319 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:44:50,421 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:44:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 209 transitions, 432 flow [2023-11-06 22:44:50,572 INFO L124 PetriNetUnfolderBase]: 13/207 cut-off events. [2023-11-06 22:44:50,577 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:44:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 207 events. 13/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 166 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2023-11-06 22:44:50,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 209 transitions, 432 flow [2023-11-06 22:44:50,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 185 transitions, 379 flow [2023-11-06 22:44:50,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:44:50,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 185 transitions, 379 flow [2023-11-06 22:44:50,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 185 transitions, 379 flow [2023-11-06 22:44:50,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 185 transitions, 379 flow [2023-11-06 22:44:50,700 INFO L124 PetriNetUnfolderBase]: 12/185 cut-off events. [2023-11-06 22:44:50,701 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:44:50,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 185 events. 12/185 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2023-11-06 22:44:50,705 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-11-06 22:44:59,149 INFO L134 LiptonReduction]: Checked pairs total: 3325 [2023-11-06 22:44:59,149 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-11-06 22:44:59,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:44:59,173 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=LoopsAndPotentialCycles, 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;@24a60f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:44:59,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-06 22:44:59,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:44:59,176 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:44:59,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:44:59,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:44:59,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:44:59,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash 29506, now seen corresponding path program 1 times [2023-11-06 22:44:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:59,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930383538] [2023-11-06 22:44:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:59,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930383538] [2023-11-06 22:44:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930383538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:59,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:44:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187094649] [2023-11-06 22:44:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:59,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:59,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:59,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:59,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:44:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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) [2023-11-06 22:44:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:44:59,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:59,749 INFO L124 PetriNetUnfolderBase]: 180/315 cut-off events. [2023-11-06 22:44:59,750 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 22:44:59,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 315 events. 180/315 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1161 event pairs, 144 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 560. Up to 313 conditions per place. [2023-11-06 22:44:59,755 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-11-06 22:44:59,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 141 flow [2023-11-06 22:44:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:44:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-11-06 22:44:59,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2023-11-06 22:44:59,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-11-06 22:44:59,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-11-06 22:44:59,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:59,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-11-06 22:44:59,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-11-06 22:44:59,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:44:59,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:44:59,796 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 75 flow. Second operand 3 states and 560 transitions. [2023-11-06 22:44:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 141 flow [2023-11-06 22:44:59,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:59,802 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 106 flow [2023-11-06 22:44:59,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-11-06 22:44:59,808 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-11-06 22:44:59,809 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 106 flow [2023-11-06 22:44:59,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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) [2023-11-06 22:44:59,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:59,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:44:59,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:44:59,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:44:59,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash 915827, now seen corresponding path program 1 times [2023-11-06 22:44:59,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:59,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175976983] [2023-11-06 22:44:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:59,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:59,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175976983] [2023-11-06 22:44:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175976983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:59,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:59,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:44:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933412078] [2023-11-06 22:44:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:59,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:59,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:44:59,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2023-11-06 22:44:59,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:59,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:44:59,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:00,110 INFO L124 PetriNetUnfolderBase]: 180/313 cut-off events. [2023-11-06 22:45:00,111 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:45:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 313 events. 180/313 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1146 event pairs, 144 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 619. Up to 305 conditions per place. [2023-11-06 22:45:00,114 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-06 22:45:00,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 160 flow [2023-11-06 22:45:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-11-06 22:45:00,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991789819376027 [2023-11-06 22:45:00,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-11-06 22:45:00,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-11-06 22:45:00,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:00,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-11-06 22:45:00,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-11-06 22:45:00,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:00,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:00,128 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 106 flow. Second operand 3 states and 548 transitions. [2023-11-06 22:45:00,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 160 flow [2023-11-06 22:45:00,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:00,139 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 94 flow [2023-11-06 22:45:00,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-06 22:45:00,141 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-06 22:45:00,141 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 94 flow [2023-11-06 22:45:00,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2023-11-06 22:45:00,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:00,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:45:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:45:00,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:00,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 915837, now seen corresponding path program 1 times [2023-11-06 22:45:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828613560] [2023-11-06 22:45:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:00,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828613560] [2023-11-06 22:45:00,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828613560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:00,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129844561] [2023-11-06 22:45:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:00,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:00,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:00,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:45:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:00,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:45:00,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:00,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129844561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:00,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:00,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:45:00,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946499299] [2023-11-06 22:45:00,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:00,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:45:00,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:45:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:45:00,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:45:00,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 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) [2023-11-06 22:45:00,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:00,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:45:00,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:00,668 INFO L124 PetriNetUnfolderBase]: 186/325 cut-off events. [2023-11-06 22:45:00,668 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:45:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 325 events. 186/325 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1193 event pairs, 144 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 619. Up to 314 conditions per place. [2023-11-06 22:45:00,672 INFO L140 encePairwiseOnDemand]: 399/406 looper letters, 26 selfloop transitions, 17 changer transitions 0/43 dead transitions. [2023-11-06 22:45:00,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 234 flow [2023-11-06 22:45:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:45:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:45:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-11-06 22:45:00,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44622331691297207 [2023-11-06 22:45:00,678 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-11-06 22:45:00,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-11-06 22:45:00,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:00,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-11-06 22:45:00,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 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) [2023-11-06 22:45:00,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:00,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:00,691 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 94 flow. Second operand 6 states and 1087 transitions. [2023-11-06 22:45:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 234 flow [2023-11-06 22:45:00,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:00,694 INFO L231 Difference]: Finished difference. Result has 37 places, 43 transitions, 206 flow [2023-11-06 22:45:00,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=37, PETRI_TRANSITIONS=43} [2023-11-06 22:45:00,696 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-11-06 22:45:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 43 transitions, 206 flow [2023-11-06 22:45:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 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) [2023-11-06 22:45:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:45:00,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:00,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:00,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:00,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 880738346, now seen corresponding path program 1 times [2023-11-06 22:45:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281974637] [2023-11-06 22:45:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:01,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281974637] [2023-11-06 22:45:01,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281974637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:01,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:01,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:45:01,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117809107] [2023-11-06 22:45:01,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:01,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:01,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 406 [2023-11-06 22:45:01,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 43 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:01,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 406 [2023-11-06 22:45:01,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:01,234 INFO L124 PetriNetUnfolderBase]: 206/374 cut-off events. [2023-11-06 22:45:01,234 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:45:01,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 374 events. 206/374 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1482 event pairs, 165 based on Foata normal form. 6/204 useless extension candidates. Maximal degree in co-relation 771. Up to 320 conditions per place. [2023-11-06 22:45:01,238 INFO L140 encePairwiseOnDemand]: 397/406 looper letters, 44 selfloop transitions, 7 changer transitions 2/53 dead transitions. [2023-11-06 22:45:01,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 336 flow [2023-11-06 22:45:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 721 transitions. [2023-11-06 22:45:01,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44396551724137934 [2023-11-06 22:45:01,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 721 transitions. [2023-11-06 22:45:01,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 721 transitions. [2023-11-06 22:45:01,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:01,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 721 transitions. [2023-11-06 22:45:01,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 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) [2023-11-06 22:45:01,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:01,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:01,251 INFO L175 Difference]: Start difference. First operand has 37 places, 43 transitions, 206 flow. Second operand 4 states and 721 transitions. [2023-11-06 22:45:01,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 336 flow [2023-11-06 22:45:01,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 310 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:45:01,256 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 207 flow [2023-11-06 22:45:01,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-11-06 22:45:01,257 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-06 22:45:01,257 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 207 flow [2023-11-06 22:45:01,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:01,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:45:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:45:01,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:01,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1533764110, now seen corresponding path program 1 times [2023-11-06 22:45:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584171365] [2023-11-06 22:45:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:01,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584171365] [2023-11-06 22:45:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584171365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592315935] [2023-11-06 22:45:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:01,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:01,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:45:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:01,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:45:01,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:01,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592315935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:01,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:01,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-06 22:45:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303620717] [2023-11-06 22:45:01,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:01,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 406 [2023-11-06 22:45:01,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-06 22:45:01,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:01,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 406 [2023-11-06 22:45:01,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:01,632 INFO L124 PetriNetUnfolderBase]: 163/301 cut-off events. [2023-11-06 22:45:01,632 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-06 22:45:01,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 301 events. 163/301 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1136 event pairs, 126 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 677. Up to 301 conditions per place. [2023-11-06 22:45:01,635 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-06 22:45:01,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 281 flow [2023-11-06 22:45:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-11-06 22:45:01,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2023-11-06 22:45:01,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-11-06 22:45:01,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-11-06 22:45:01,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:01,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-11-06 22:45:01,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-11-06 22:45:01,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:01,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:01,647 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 207 flow. Second operand 3 states and 570 transitions. [2023-11-06 22:45:01,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 281 flow [2023-11-06 22:45:01,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 273 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:45:01,654 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 193 flow [2023-11-06 22:45:01,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2023-11-06 22:45:01,658 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:45:01,658 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 193 flow [2023-11-06 22:45:01,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-06 22:45:01,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:01,659 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:45:01,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:01,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:01,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:01,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731404, now seen corresponding path program 2 times [2023-11-06 22:45:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:01,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58074965] [2023-11-06 22:45:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:01,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58074965] [2023-11-06 22:45:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58074965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248927437] [2023-11-06 22:45:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:01,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:02,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:45:02,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:45:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:02,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:02,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:45:02,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:02,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248927437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:02,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:45:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141902424] [2023-11-06 22:45:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:45:02,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 406 [2023-11-06 22:45:02,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 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) [2023-11-06 22:45:02,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:02,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 406 [2023-11-06 22:45:02,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:02,228 INFO L124 PetriNetUnfolderBase]: 163/300 cut-off events. [2023-11-06 22:45:02,229 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-06 22:45:02,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 300 events. 163/300 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1135 event pairs, 126 based on Foata normal form. 1/188 useless extension candidates. Maximal degree in co-relation 719. Up to 295 conditions per place. [2023-11-06 22:45:02,232 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 34 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-06 22:45:02,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 263 flow [2023-11-06 22:45:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-11-06 22:45:02,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45648604269293924 [2023-11-06 22:45:02,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-11-06 22:45:02,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-11-06 22:45:02,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:02,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-11-06 22:45:02,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 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) [2023-11-06 22:45:02,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:02,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:02,244 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 193 flow. Second operand 3 states and 556 transitions. [2023-11-06 22:45:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 263 flow [2023-11-06 22:45:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:45:02,247 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 194 flow [2023-11-06 22:45:02,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-11-06 22:45:02,250 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:45:02,250 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 194 flow [2023-11-06 22:45:02,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 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) [2023-11-06 22:45:02,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:02,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:02,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:02,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:02,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:02,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash 302048009, now seen corresponding path program 1 times [2023-11-06 22:45:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:02,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418404968] [2023-11-06 22:45:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:02,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418404968] [2023-11-06 22:45:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418404968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:02,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:45:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301773355] [2023-11-06 22:45:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:45:02,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 406 [2023-11-06 22:45:02,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2023-11-06 22:45:02,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:02,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 406 [2023-11-06 22:45:02,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:02,688 INFO L124 PetriNetUnfolderBase]: 182/337 cut-off events. [2023-11-06 22:45:02,688 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 22:45:02,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 337 events. 182/337 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1320 event pairs, 69 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 798. Up to 225 conditions per place. [2023-11-06 22:45:02,691 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 45 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-11-06 22:45:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 309 flow [2023-11-06 22:45:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-11-06 22:45:02,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044334975369456 [2023-11-06 22:45:02,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-11-06 22:45:02,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-11-06 22:45:02,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:02,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-11-06 22:45:02,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 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) [2023-11-06 22:45:02,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:02,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:02,701 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 194 flow. Second operand 3 states and 573 transitions. [2023-11-06 22:45:02,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 309 flow [2023-11-06 22:45:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:02,704 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 200 flow [2023-11-06 22:45:02,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2023-11-06 22:45:02,705 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-06 22:45:02,706 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 200 flow [2023-11-06 22:45:02,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2023-11-06 22:45:02,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:02,706 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:45:02,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:45:02,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:02,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash 302748899, now seen corresponding path program 1 times [2023-11-06 22:45:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:02,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781631577] [2023-11-06 22:45:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:02,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:02,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781631577] [2023-11-06 22:45:02,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781631577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117620476] [2023-11-06 22:45:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:02,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:02,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:45:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:02,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:45:02,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:02,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117620476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:03,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:45:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525148207] [2023-11-06 22:45:03,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:45:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:45:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:45:03,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:45:03,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 200 flow. Second operand has 13 states, 13 states have (on average 174.15384615384616) internal successors, (2264), 13 states have internal predecessors, (2264), 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) [2023-11-06 22:45:03,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:45:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:03,308 INFO L124 PetriNetUnfolderBase]: 194/361 cut-off events. [2023-11-06 22:45:03,308 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-06 22:45:03,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 361 events. 194/361 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1453 event pairs, 147 based on Foata normal form. 6/260 useless extension candidates. Maximal degree in co-relation 979. Up to 332 conditions per place. [2023-11-06 22:45:03,311 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 24 selfloop transitions, 41 changer transitions 0/65 dead transitions. [2023-11-06 22:45:03,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 474 flow [2023-11-06 22:45:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:45:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:45:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2146 transitions. [2023-11-06 22:45:03,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-06 22:45:03,321 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2146 transitions. [2023-11-06 22:45:03,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2146 transitions. [2023-11-06 22:45:03,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:03,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2146 transitions. [2023-11-06 22:45:03,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 178.83333333333334) internal successors, (2146), 12 states have internal predecessors, (2146), 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) [2023-11-06 22:45:03,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 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) [2023-11-06 22:45:03,342 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 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) [2023-11-06 22:45:03,342 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 200 flow. Second operand 12 states and 2146 transitions. [2023-11-06 22:45:03,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 474 flow [2023-11-06 22:45:03,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:45:03,346 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 478 flow [2023-11-06 22:45:03,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=478, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2023-11-06 22:45:03,347 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-11-06 22:45:03,347 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 478 flow [2023-11-06 22:45:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 174.15384615384616) internal successors, (2264), 13 states have internal predecessors, (2264), 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) [2023-11-06 22:45:03,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:03,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:03,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:03,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:03,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash 281099085, now seen corresponding path program 1 times [2023-11-06 22:45:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732167737] [2023-11-06 22:45:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732167737] [2023-11-06 22:45:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732167737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:03,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:45:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192992055] [2023-11-06 22:45:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:03,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 406 [2023-11-06 22:45:03,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2023-11-06 22:45:03,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:03,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 406 [2023-11-06 22:45:03,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:03,932 INFO L124 PetriNetUnfolderBase]: 227/446 cut-off events. [2023-11-06 22:45:03,932 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-11-06 22:45:03,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 446 events. 227/446 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1890 event pairs, 171 based on Foata normal form. 14/362 useless extension candidates. Maximal degree in co-relation 1314. Up to 360 conditions per place. [2023-11-06 22:45:03,937 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 74 selfloop transitions, 3 changer transitions 20/97 dead transitions. [2023-11-06 22:45:03,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 97 transitions, 909 flow [2023-11-06 22:45:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:45:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:45:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2023-11-06 22:45:03,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610837438423643 [2023-11-06 22:45:03,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2023-11-06 22:45:03,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2023-11-06 22:45:03,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:03,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2023-11-06 22:45:03,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 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) [2023-11-06 22:45:03,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 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) [2023-11-06 22:45:03,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 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) [2023-11-06 22:45:03,954 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 478 flow. Second operand 5 states and 865 transitions. [2023-11-06 22:45:03,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 97 transitions, 909 flow [2023-11-06 22:45:03,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 717 flow, removed 65 selfloop flow, removed 5 redundant places. [2023-11-06 22:45:03,964 INFO L231 Difference]: Finished difference. Result has 57 places, 65 transitions, 387 flow [2023-11-06 22:45:03,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=57, PETRI_TRANSITIONS=65} [2023-11-06 22:45:03,966 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-11-06 22:45:03,966 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 65 transitions, 387 flow [2023-11-06 22:45:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2023-11-06 22:45:03,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:03,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:03,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:45:03,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:03,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 232057788, now seen corresponding path program 1 times [2023-11-06 22:45:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360991752] [2023-11-06 22:45:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:04,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360991752] [2023-11-06 22:45:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360991752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737315939] [2023-11-06 22:45:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:04,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:04,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:04,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:04,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:45:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:04,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:45:04,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:04,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737315939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:04,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:45:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45290356] [2023-11-06 22:45:04,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:04,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:04,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:04,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 406 [2023-11-06 22:45:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 65 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-11-06 22:45:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 406 [2023-11-06 22:45:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:04,385 INFO L124 PetriNetUnfolderBase]: 144/285 cut-off events. [2023-11-06 22:45:04,385 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-06 22:45:04,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 285 events. 144/285 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1075 event pairs, 101 based on Foata normal form. 26/266 useless extension candidates. Maximal degree in co-relation 853. Up to 285 conditions per place. [2023-11-06 22:45:04,388 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 61 selfloop transitions, 1 changer transitions 1/63 dead transitions. [2023-11-06 22:45:04,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 505 flow [2023-11-06 22:45:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-11-06 22:45:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-11-06 22:45:04,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-11-06 22:45:04,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-11-06 22:45:04,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:04,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-11-06 22:45:04,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2023-11-06 22:45:04,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:04,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:04,398 INFO L175 Difference]: Start difference. First operand has 57 places, 65 transitions, 387 flow. Second operand 3 states and 567 transitions. [2023-11-06 22:45:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 505 flow [2023-11-06 22:45:04,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 483 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:45:04,404 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 350 flow [2023-11-06 22:45:04,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2023-11-06 22:45:04,406 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-11-06 22:45:04,406 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 350 flow [2023-11-06 22:45:04,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-11-06 22:45:04,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:04,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:04,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:04,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:04,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:04,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1671223921, now seen corresponding path program 1 times [2023-11-06 22:45:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:04,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306643719] [2023-11-06 22:45:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:04,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:45:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306643719] [2023-11-06 22:45:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306643719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:45:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213312870] [2023-11-06 22:45:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:45:04,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:45:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:45:04,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 406 [2023-11-06 22:45:04,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:04,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:04,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 406 [2023-11-06 22:45:04,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:04,795 INFO L124 PetriNetUnfolderBase]: 131/255 cut-off events. [2023-11-06 22:45:04,795 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-06 22:45:04,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 255 events. 131/255 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 857 event pairs, 55 based on Foata normal form. 6/216 useless extension candidates. Maximal degree in co-relation 753. Up to 162 conditions per place. [2023-11-06 22:45:04,797 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 65 selfloop transitions, 2 changer transitions 4/71 dead transitions. [2023-11-06 22:45:04,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 517 flow [2023-11-06 22:45:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:45:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:45:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-11-06 22:45:04,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688013136288998 [2023-11-06 22:45:04,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-11-06 22:45:04,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-11-06 22:45:04,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:04,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-11-06 22:45:04,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2023-11-06 22:45:04,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:04,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 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) [2023-11-06 22:45:04,808 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 350 flow. Second operand 3 states and 571 transitions. [2023-11-06 22:45:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 517 flow [2023-11-06 22:45:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:45:04,813 INFO L231 Difference]: Finished difference. Result has 54 places, 63 transitions, 367 flow [2023-11-06 22:45:04,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=54, PETRI_TRANSITIONS=63} [2023-11-06 22:45:04,814 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-11-06 22:45:04,814 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 63 transitions, 367 flow [2023-11-06 22:45:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:04,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:45:04,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:04,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash -268334982, now seen corresponding path program 1 times [2023-11-06 22:45:04,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:04,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454785488] [2023-11-06 22:45:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:04,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454785488] [2023-11-06 22:45:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454785488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327258785] [2023-11-06 22:45:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:05,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:05,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:05,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:45:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:05,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:45:05,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:05,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:45:05,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:05,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:45:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:05,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:45:05,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:45:05,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:05,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:05,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:06,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:06,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:45:06,319 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:06,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 276 [2023-11-06 22:45:06,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:06,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2023-11-06 22:45:06,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:06,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2023-11-06 22:45:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327258785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:06,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-06 22:45:06,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517445848] [2023-11-06 22:45:06,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:45:06,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:45:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=267, Unknown=2, NotChecked=0, Total=342 [2023-11-06 22:45:08,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 406 [2023-11-06 22:45:08,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 367 flow. Second operand has 19 states, 19 states have (on average 121.73684210526316) internal successors, (2313), 19 states have internal predecessors, (2313), 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) [2023-11-06 22:45:08,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:08,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 406 [2023-11-06 22:45:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:10,190 INFO L124 PetriNetUnfolderBase]: 542/987 cut-off events. [2023-11-06 22:45:10,190 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2023-11-06 22:45:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 987 events. 542/987 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4848 event pairs, 43 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2916. Up to 261 conditions per place. [2023-11-06 22:45:10,201 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 140 selfloop transitions, 65 changer transitions 8/213 dead transitions. [2023-11-06 22:45:10,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 213 transitions, 1356 flow [2023-11-06 22:45:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:45:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:45:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3565 transitions. [2023-11-06 22:45:10,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3135995777621393 [2023-11-06 22:45:10,218 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3565 transitions. [2023-11-06 22:45:10,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3565 transitions. [2023-11-06 22:45:10,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:10,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3565 transitions. [2023-11-06 22:45:10,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 127.32142857142857) internal successors, (3565), 28 states have internal predecessors, (3565), 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) [2023-11-06 22:45:10,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:10,258 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:10,258 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 367 flow. Second operand 28 states and 3565 transitions. [2023-11-06 22:45:10,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 213 transitions, 1356 flow [2023-11-06 22:45:10,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 213 transitions, 1257 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:10,268 INFO L231 Difference]: Finished difference. Result has 98 places, 118 transitions, 869 flow [2023-11-06 22:45:10,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=869, PETRI_PLACES=98, PETRI_TRANSITIONS=118} [2023-11-06 22:45:10,269 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2023-11-06 22:45:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 118 transitions, 869 flow [2023-11-06 22:45:10,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 121.73684210526316) internal successors, (2313), 19 states have internal predecessors, (2313), 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) [2023-11-06 22:45:10,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:10,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:10,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:45:10,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:10,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash -268334973, now seen corresponding path program 1 times [2023-11-06 22:45:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852508882] [2023-11-06 22:45:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852508882] [2023-11-06 22:45:11,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852508882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134718123] [2023-11-06 22:45:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:11,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:11,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:11,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:45:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:11,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:45:11,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:45:11,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:11,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134718123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:11,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:11,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-06 22:45:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276745558] [2023-11-06 22:45:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:45:11,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:45:11,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 118 transitions, 869 flow. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 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) [2023-11-06 22:45:11,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:11,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:45:11,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:12,038 INFO L124 PetriNetUnfolderBase]: 508/925 cut-off events. [2023-11-06 22:45:12,039 INFO L125 PetriNetUnfolderBase]: For 5561/5561 co-relation queries the response was YES. [2023-11-06 22:45:12,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 925 events. 508/925 cut-off events. For 5561/5561 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4458 event pairs, 112 based on Foata normal form. 20/853 useless extension candidates. Maximal degree in co-relation 3688. Up to 733 conditions per place. [2023-11-06 22:45:12,051 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 111 selfloop transitions, 8 changer transitions 7/126 dead transitions. [2023-11-06 22:45:12,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 126 transitions, 1181 flow [2023-11-06 22:45:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-11-06 22:45:12,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45197044334975367 [2023-11-06 22:45:12,056 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-11-06 22:45:12,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-11-06 22:45:12,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:12,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-11-06 22:45:12,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 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) [2023-11-06 22:45:12,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:12,062 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:12,063 INFO L175 Difference]: Start difference. First operand has 98 places, 118 transitions, 869 flow. Second operand 4 states and 734 transitions. [2023-11-06 22:45:12,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 126 transitions, 1181 flow [2023-11-06 22:45:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1088 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:12,136 INFO L231 Difference]: Finished difference. Result has 91 places, 111 transitions, 752 flow [2023-11-06 22:45:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=752, PETRI_PLACES=91, PETRI_TRANSITIONS=111} [2023-11-06 22:45:12,155 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2023-11-06 22:45:12,155 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 111 transitions, 752 flow [2023-11-06 22:45:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 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) [2023-11-06 22:45:12,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:12,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:12,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:12,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:12,362 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:12,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash -343389692, now seen corresponding path program 1 times [2023-11-06 22:45:12,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:12,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380076872] [2023-11-06 22:45:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:12,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380076872] [2023-11-06 22:45:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380076872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714318204] [2023-11-06 22:45:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:12,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:12,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:45:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:12,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:45:12,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:13,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:13,106 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:13,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-11-06 22:45:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714318204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:13,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-06 22:45:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000335588] [2023-11-06 22:45:13,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:13,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:45:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:45:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:45:13,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 406 [2023-11-06 22:45:13,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 111 transitions, 752 flow. Second operand has 14 states, 14 states have (on average 153.35714285714286) internal successors, (2147), 14 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:13,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:13,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 406 [2023-11-06 22:45:13,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:14,722 INFO L124 PetriNetUnfolderBase]: 651/1202 cut-off events. [2023-11-06 22:45:14,722 INFO L125 PetriNetUnfolderBase]: For 6329/6329 co-relation queries the response was YES. [2023-11-06 22:45:14,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4666 conditions, 1202 events. 651/1202 cut-off events. For 6329/6329 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6279 event pairs, 94 based on Foata normal form. 0/1110 useless extension candidates. Maximal degree in co-relation 4625. Up to 758 conditions per place. [2023-11-06 22:45:14,737 INFO L140 encePairwiseOnDemand]: 394/406 looper letters, 155 selfloop transitions, 42 changer transitions 11/208 dead transitions. [2023-11-06 22:45:14,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 208 transitions, 1865 flow [2023-11-06 22:45:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:45:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:45:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2360 transitions. [2023-11-06 22:45:14,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38752052545155996 [2023-11-06 22:45:14,747 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2360 transitions. [2023-11-06 22:45:14,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2360 transitions. [2023-11-06 22:45:14,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:14,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2360 transitions. [2023-11-06 22:45:14,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 157.33333333333334) internal successors, (2360), 15 states have internal predecessors, (2360), 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) [2023-11-06 22:45:14,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 406.0) internal successors, (6496), 16 states have internal predecessors, (6496), 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) [2023-11-06 22:45:14,769 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 406.0) internal successors, (6496), 16 states have internal predecessors, (6496), 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) [2023-11-06 22:45:14,769 INFO L175 Difference]: Start difference. First operand has 91 places, 111 transitions, 752 flow. Second operand 15 states and 2360 transitions. [2023-11-06 22:45:14,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 208 transitions, 1865 flow [2023-11-06 22:45:14,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 208 transitions, 1853 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:14,812 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1211 flow [2023-11-06 22:45:14,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1211, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2023-11-06 22:45:14,813 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 71 predicate places. [2023-11-06 22:45:14,813 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1211 flow [2023-11-06 22:45:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 153.35714285714286) internal successors, (2147), 14 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:14,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:14,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:14,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:15,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:15,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1668112320, now seen corresponding path program 2 times [2023-11-06 22:45:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93509428] [2023-11-06 22:45:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:15,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:15,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93509428] [2023-11-06 22:45:15,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93509428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:15,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48029288] [2023-11-06 22:45:15,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:15,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:15,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:15,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:15,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:45:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:45:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:15,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:45:15,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:16,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48029288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-06 22:45:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169314520] [2023-11-06 22:45:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:16,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:16,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:45:16,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 406 [2023-11-06 22:45:16,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1211 flow. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 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) [2023-11-06 22:45:16,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:16,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 406 [2023-11-06 22:45:16,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:16,454 INFO L124 PetriNetUnfolderBase]: 783/1422 cut-off events. [2023-11-06 22:45:16,455 INFO L125 PetriNetUnfolderBase]: For 11549/11549 co-relation queries the response was YES. [2023-11-06 22:45:16,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 1422 events. 783/1422 cut-off events. For 11549/11549 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7694 event pairs, 188 based on Foata normal form. 12/1318 useless extension candidates. Maximal degree in co-relation 6027. Up to 1040 conditions per place. [2023-11-06 22:45:16,474 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 161 selfloop transitions, 25 changer transitions 5/191 dead transitions. [2023-11-06 22:45:16,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 191 transitions, 1993 flow [2023-11-06 22:45:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 737 transitions. [2023-11-06 22:45:16,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538177339901478 [2023-11-06 22:45:16,478 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 737 transitions. [2023-11-06 22:45:16,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 737 transitions. [2023-11-06 22:45:16,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:16,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 737 transitions. [2023-11-06 22:45:16,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 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) [2023-11-06 22:45:16,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:16,486 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:16,486 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1211 flow. Second operand 4 states and 737 transitions. [2023-11-06 22:45:16,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 191 transitions, 1993 flow [2023-11-06 22:45:16,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 191 transitions, 1800 flow, removed 67 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:16,529 INFO L231 Difference]: Finished difference. Result has 105 places, 162 transitions, 1399 flow [2023-11-06 22:45:16,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1399, PETRI_PLACES=105, PETRI_TRANSITIONS=162} [2023-11-06 22:45:16,531 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-11-06 22:45:16,531 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 162 transitions, 1399 flow [2023-11-06 22:45:16,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 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) [2023-11-06 22:45:16,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:16,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:16,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:45:16,738 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:16,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1591251539, now seen corresponding path program 1 times [2023-11-06 22:45:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:16,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608679990] [2023-11-06 22:45:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:16,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:17,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608679990] [2023-11-06 22:45:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608679990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335955121] [2023-11-06 22:45:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:17,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:17,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:17,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:17,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:45:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:17,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:45:17,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:17,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:45:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:45:17,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:17,989 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2023-11-06 22:45:18,001 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:18,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-11-06 22:45:18,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:45:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335955121] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:18,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-11-06 22:45:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801097506] [2023-11-06 22:45:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:18,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:45:18,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:45:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=296, Unknown=1, NotChecked=34, Total=380 [2023-11-06 22:45:18,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 406 [2023-11-06 22:45:18,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 162 transitions, 1399 flow. Second operand has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 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) [2023-11-06 22:45:18,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:18,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 406 [2023-11-06 22:45:18,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:18,733 INFO L124 PetriNetUnfolderBase]: 788/1443 cut-off events. [2023-11-06 22:45:18,733 INFO L125 PetriNetUnfolderBase]: For 11529/11529 co-relation queries the response was YES. [2023-11-06 22:45:18,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6145 conditions, 1443 events. 788/1443 cut-off events. For 11529/11529 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7822 event pairs, 186 based on Foata normal form. 22/1365 useless extension candidates. Maximal degree in co-relation 6099. Up to 897 conditions per place. [2023-11-06 22:45:18,753 INFO L140 encePairwiseOnDemand]: 394/406 looper letters, 110 selfloop transitions, 73 changer transitions 6/189 dead transitions. [2023-11-06 22:45:18,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1901 flow [2023-11-06 22:45:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:45:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:45:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2023-11-06 22:45:18,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805418719211823 [2023-11-06 22:45:18,760 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2023-11-06 22:45:18,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2023-11-06 22:45:18,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:18,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2023-11-06 22:45:18,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 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) [2023-11-06 22:45:18,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:18,771 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:18,771 INFO L175 Difference]: Start difference. First operand has 105 places, 162 transitions, 1399 flow. Second operand 6 states and 927 transitions. [2023-11-06 22:45:18,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1901 flow [2023-11-06 22:45:18,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1859 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:45:18,813 INFO L231 Difference]: Finished difference. Result has 108 places, 170 transitions, 1648 flow [2023-11-06 22:45:18,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1648, PETRI_PLACES=108, PETRI_TRANSITIONS=170} [2023-11-06 22:45:18,814 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 72 predicate places. [2023-11-06 22:45:18,814 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 170 transitions, 1648 flow [2023-11-06 22:45:18,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 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) [2023-11-06 22:45:18,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:18,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:18,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:45:19,021 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:19,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1591251540, now seen corresponding path program 3 times [2023-11-06 22:45:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150522252] [2023-11-06 22:45:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150522252] [2023-11-06 22:45:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150522252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655254404] [2023-11-06 22:45:19,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:45:19,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:19,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:19,861 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:19,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:45:19,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:45:19,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:19,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:45:19,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:20,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:45:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:20,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:20,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655254404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:20,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:20,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:45:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134837029] [2023-11-06 22:45:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:20,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:45:20,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:45:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:45:20,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 406 [2023-11-06 22:45:20,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 170 transitions, 1648 flow. Second operand has 7 states, 7 states have (on average 164.57142857142858) internal successors, (1152), 7 states have internal predecessors, (1152), 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) [2023-11-06 22:45:20,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:20,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 406 [2023-11-06 22:45:20,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:20,800 INFO L124 PetriNetUnfolderBase]: 752/1407 cut-off events. [2023-11-06 22:45:20,801 INFO L125 PetriNetUnfolderBase]: For 11729/11729 co-relation queries the response was YES. [2023-11-06 22:45:20,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6684 conditions, 1407 events. 752/1407 cut-off events. For 11729/11729 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7759 event pairs, 194 based on Foata normal form. 12/1335 useless extension candidates. Maximal degree in co-relation 6637. Up to 869 conditions per place. [2023-11-06 22:45:20,822 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 119 selfloop transitions, 59 changer transitions 5/183 dead transitions. [2023-11-06 22:45:20,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 2000 flow [2023-11-06 22:45:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:45:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:45:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 858 transitions. [2023-11-06 22:45:20,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42266009852216746 [2023-11-06 22:45:20,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 858 transitions. [2023-11-06 22:45:20,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 858 transitions. [2023-11-06 22:45:20,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:20,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 858 transitions. [2023-11-06 22:45:20,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 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) [2023-11-06 22:45:20,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 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) [2023-11-06 22:45:20,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 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) [2023-11-06 22:45:20,833 INFO L175 Difference]: Start difference. First operand has 108 places, 170 transitions, 1648 flow. Second operand 5 states and 858 transitions. [2023-11-06 22:45:20,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 2000 flow [2023-11-06 22:45:20,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 1875 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-06 22:45:20,878 INFO L231 Difference]: Finished difference. Result has 105 places, 165 transitions, 1541 flow [2023-11-06 22:45:20,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1541, PETRI_PLACES=105, PETRI_TRANSITIONS=165} [2023-11-06 22:45:20,879 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-11-06 22:45:20,879 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 165 transitions, 1541 flow [2023-11-06 22:45:20,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.57142857142858) internal successors, (1152), 7 states have internal predecessors, (1152), 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) [2023-11-06 22:45:20,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:20,880 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:45:20,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:45:21,086 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:21,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash 924944995, now seen corresponding path program 2 times [2023-11-06 22:45:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:21,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922679851] [2023-11-06 22:45:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922679851] [2023-11-06 22:45:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922679851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468656701] [2023-11-06 22:45:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:21,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:21,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:21,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:21,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:45:21,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:45:21,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:21,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:21,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:45:21,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468656701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:21,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-06 22:45:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036406150] [2023-11-06 22:45:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:45:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-06 22:45:21,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 165 transitions, 1541 flow. Second operand has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-06 22:45:21,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:21,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-06 22:45:21,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:21,865 INFO L124 PetriNetUnfolderBase]: 752/1404 cut-off events. [2023-11-06 22:45:21,865 INFO L125 PetriNetUnfolderBase]: For 7362/7362 co-relation queries the response was YES. [2023-11-06 22:45:21,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6287 conditions, 1404 events. 752/1404 cut-off events. For 7362/7362 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7819 event pairs, 384 based on Foata normal form. 3/1315 useless extension candidates. Maximal degree in co-relation 6245. Up to 1348 conditions per place. [2023-11-06 22:45:21,895 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 139 selfloop transitions, 21 changer transitions 3/163 dead transitions. [2023-11-06 22:45:21,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1820 flow [2023-11-06 22:45:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 722 transitions. [2023-11-06 22:45:21,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445812807881773 [2023-11-06 22:45:21,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 722 transitions. [2023-11-06 22:45:21,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 722 transitions. [2023-11-06 22:45:21,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:21,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 722 transitions. [2023-11-06 22:45:21,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 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) [2023-11-06 22:45:21,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:21,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:21,904 INFO L175 Difference]: Start difference. First operand has 105 places, 165 transitions, 1541 flow. Second operand 4 states and 722 transitions. [2023-11-06 22:45:21,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1820 flow [2023-11-06 22:45:21,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 163 transitions, 1623 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-11-06 22:45:21,936 INFO L231 Difference]: Finished difference. Result has 93 places, 160 transitions, 1322 flow [2023-11-06 22:45:21,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1322, PETRI_PLACES=93, PETRI_TRANSITIONS=160} [2023-11-06 22:45:21,937 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2023-11-06 22:45:21,938 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 160 transitions, 1322 flow [2023-11-06 22:45:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-06 22:45:21,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:21,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:21,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:22,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:45:22,144 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:22,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash -171831625, now seen corresponding path program 1 times [2023-11-06 22:45:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:22,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798145105] [2023-11-06 22:45:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:22,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798145105] [2023-11-06 22:45:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798145105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749664197] [2023-11-06 22:45:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:22,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:45:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:22,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:45:22,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:22,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749664197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:22,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:22,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:45:22,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145855553] [2023-11-06 22:45:22,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:45:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:45:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:45:22,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 406 [2023-11-06 22:45:22,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 160 transitions, 1322 flow. Second operand has 12 states, 12 states have (on average 165.08333333333334) internal successors, (1981), 12 states have internal predecessors, (1981), 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) [2023-11-06 22:45:22,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:22,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 406 [2023-11-06 22:45:22,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:23,121 INFO L124 PetriNetUnfolderBase]: 525/1020 cut-off events. [2023-11-06 22:45:23,121 INFO L125 PetriNetUnfolderBase]: For 6230/6230 co-relation queries the response was YES. [2023-11-06 22:45:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4635 conditions, 1020 events. 525/1020 cut-off events. For 6230/6230 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5312 event pairs, 246 based on Foata normal form. 34/1014 useless extension candidates. Maximal degree in co-relation 4602. Up to 605 conditions per place. [2023-11-06 22:45:23,133 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 129 selfloop transitions, 15 changer transitions 5/149 dead transitions. [2023-11-06 22:45:23,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 149 transitions, 1522 flow [2023-11-06 22:45:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:45:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:45:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1025 transitions. [2023-11-06 22:45:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42077175697865354 [2023-11-06 22:45:23,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1025 transitions. [2023-11-06 22:45:23,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1025 transitions. [2023-11-06 22:45:23,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:23,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1025 transitions. [2023-11-06 22:45:23,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.83333333333334) internal successors, (1025), 6 states have internal predecessors, (1025), 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) [2023-11-06 22:45:23,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:23,146 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 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) [2023-11-06 22:45:23,146 INFO L175 Difference]: Start difference. First operand has 93 places, 160 transitions, 1322 flow. Second operand 6 states and 1025 transitions. [2023-11-06 22:45:23,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 149 transitions, 1522 flow [2023-11-06 22:45:23,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 149 transitions, 1418 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-11-06 22:45:23,165 INFO L231 Difference]: Finished difference. Result has 77 places, 122 transitions, 983 flow [2023-11-06 22:45:23,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=77, PETRI_TRANSITIONS=122} [2023-11-06 22:45:23,166 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2023-11-06 22:45:23,166 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 122 transitions, 983 flow [2023-11-06 22:45:23,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.08333333333334) internal successors, (1981), 12 states have internal predecessors, (1981), 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) [2023-11-06 22:45:23,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:23,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:23,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:23,373 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:23,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -171813997, now seen corresponding path program 1 times [2023-11-06 22:45:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61446178] [2023-11-06 22:45:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61446178] [2023-11-06 22:45:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61446178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222660966] [2023-11-06 22:45:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:23,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:23,517 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:23,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:45:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:23,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:45:23,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:23,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:23,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222660966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:23,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:23,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:45:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578337632] [2023-11-06 22:45:23,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:45:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:45:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:45:24,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 406 [2023-11-06 22:45:24,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 122 transitions, 983 flow. Second operand has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 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) [2023-11-06 22:45:24,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:24,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 406 [2023-11-06 22:45:24,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:24,338 INFO L124 PetriNetUnfolderBase]: 550/1099 cut-off events. [2023-11-06 22:45:24,338 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2023-11-06 22:45:24,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4552 conditions, 1099 events. 550/1099 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6078 event pairs, 283 based on Foata normal form. 36/1091 useless extension candidates. Maximal degree in co-relation 4527. Up to 712 conditions per place. [2023-11-06 22:45:24,352 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 126 selfloop transitions, 15 changer transitions 18/159 dead transitions. [2023-11-06 22:45:24,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 159 transitions, 1500 flow [2023-11-06 22:45:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:45:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:45:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1188 transitions. [2023-11-06 22:45:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180154820548909 [2023-11-06 22:45:24,359 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1188 transitions. [2023-11-06 22:45:24,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1188 transitions. [2023-11-06 22:45:24,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:24,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1188 transitions. [2023-11-06 22:45:24,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 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) [2023-11-06 22:45:24,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 406.0) internal successors, (3248), 8 states have internal predecessors, (3248), 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) [2023-11-06 22:45:24,368 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 406.0) internal successors, (3248), 8 states have internal predecessors, (3248), 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) [2023-11-06 22:45:24,368 INFO L175 Difference]: Start difference. First operand has 77 places, 122 transitions, 983 flow. Second operand 7 states and 1188 transitions. [2023-11-06 22:45:24,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 159 transitions, 1500 flow [2023-11-06 22:45:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 159 transitions, 1461 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:45:24,384 INFO L231 Difference]: Finished difference. Result has 80 places, 113 transitions, 881 flow [2023-11-06 22:45:24,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=80, PETRI_TRANSITIONS=113} [2023-11-06 22:45:24,385 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-11-06 22:45:24,385 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 113 transitions, 881 flow [2023-11-06 22:45:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 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) [2023-11-06 22:45:24,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:24,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:24,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:24,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:24,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -786058046, now seen corresponding path program 2 times [2023-11-06 22:45:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:24,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917900302] [2023-11-06 22:45:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:24,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:45:24,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:24,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917900302] [2023-11-06 22:45:24,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917900302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:24,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:24,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:45:24,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867561267] [2023-11-06 22:45:24,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:24,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:45:24,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 406 [2023-11-06 22:45:24,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 113 transitions, 881 flow. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 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) [2023-11-06 22:45:24,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:24,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 406 [2023-11-06 22:45:24,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:24,965 INFO L124 PetriNetUnfolderBase]: 648/1297 cut-off events. [2023-11-06 22:45:24,966 INFO L125 PetriNetUnfolderBase]: For 4286/4286 co-relation queries the response was YES. [2023-11-06 22:45:24,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5155 conditions, 1297 events. 648/1297 cut-off events. For 4286/4286 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7188 event pairs, 245 based on Foata normal form. 72/1291 useless extension candidates. Maximal degree in co-relation 5128. Up to 544 conditions per place. [2023-11-06 22:45:24,977 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 112 selfloop transitions, 21 changer transitions 10/143 dead transitions. [2023-11-06 22:45:24,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 143 transitions, 1384 flow [2023-11-06 22:45:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 765 transitions. [2023-11-06 22:45:24,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710591133004926 [2023-11-06 22:45:24,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 765 transitions. [2023-11-06 22:45:24,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 765 transitions. [2023-11-06 22:45:24,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:24,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 765 transitions. [2023-11-06 22:45:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 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) [2023-11-06 22:45:24,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:24,991 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:24,991 INFO L175 Difference]: Start difference. First operand has 80 places, 113 transitions, 881 flow. Second operand 4 states and 765 transitions. [2023-11-06 22:45:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 143 transitions, 1384 flow [2023-11-06 22:45:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 143 transitions, 1334 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:25,007 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 949 flow [2023-11-06 22:45:25,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-11-06 22:45:25,008 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 43 predicate places. [2023-11-06 22:45:25,008 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 949 flow [2023-11-06 22:45:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 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) [2023-11-06 22:45:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:25,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:45:25,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:25,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash -702437231, now seen corresponding path program 2 times [2023-11-06 22:45:25,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:25,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898189069] [2023-11-06 22:45:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:25,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:25,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:25,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898189069] [2023-11-06 22:45:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898189069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8885371] [2023-11-06 22:45:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:25,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:25,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:45:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:45:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:25,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:45:25,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:45:25,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:25,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8885371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:25,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:45:25,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-06 22:45:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874126286] [2023-11-06 22:45:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:25,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:45:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:45:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:45:25,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 406 [2023-11-06 22:45:25,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 949 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 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) [2023-11-06 22:45:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 406 [2023-11-06 22:45:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:25,654 INFO L124 PetriNetUnfolderBase]: 742/1475 cut-off events. [2023-11-06 22:45:25,655 INFO L125 PetriNetUnfolderBase]: For 6423/6423 co-relation queries the response was YES. [2023-11-06 22:45:25,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6684 conditions, 1475 events. 742/1475 cut-off events. For 6423/6423 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8506 event pairs, 240 based on Foata normal form. 68/1413 useless extension candidates. Maximal degree in co-relation 6656. Up to 637 conditions per place. [2023-11-06 22:45:25,670 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 123 selfloop transitions, 10 changer transitions 22/155 dead transitions. [2023-11-06 22:45:25,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 1724 flow [2023-11-06 22:45:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:45:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 763 transitions. [2023-11-06 22:45:25,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698275862068966 [2023-11-06 22:45:25,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 763 transitions. [2023-11-06 22:45:25,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 763 transitions. [2023-11-06 22:45:25,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:25,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 763 transitions. [2023-11-06 22:45:25,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.75) internal successors, (763), 4 states have internal predecessors, (763), 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) [2023-11-06 22:45:25,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:25,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 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) [2023-11-06 22:45:25,677 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 949 flow. Second operand 4 states and 763 transitions. [2023-11-06 22:45:25,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 1724 flow [2023-11-06 22:45:25,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 155 transitions, 1604 flow, removed 60 selfloop flow, removed 5 redundant places. [2023-11-06 22:45:25,695 INFO L231 Difference]: Finished difference. Result has 72 places, 91 transitions, 723 flow [2023-11-06 22:45:25,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=723, PETRI_PLACES=72, PETRI_TRANSITIONS=91} [2023-11-06 22:45:25,696 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2023-11-06 22:45:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 91 transitions, 723 flow [2023-11-06 22:45:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 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) [2023-11-06 22:45:25,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:25,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:25,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:25,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:45:25,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:25,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 340241045, now seen corresponding path program 1 times [2023-11-06 22:45:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:25,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353039892] [2023-11-06 22:45:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353039892] [2023-11-06 22:45:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353039892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371038752] [2023-11-06 22:45:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:26,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:26,440 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:26,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:45:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:26,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:45:26,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:26,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:26,955 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:26,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 22:45:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371038752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:27,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2023-11-06 22:45:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578031686] [2023-11-06 22:45:27,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:45:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:45:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:45:28,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 406 [2023-11-06 22:45:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 91 transitions, 723 flow. Second operand has 29 states, 29 states have (on average 152.6206896551724) internal successors, (4426), 29 states have internal predecessors, (4426), 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) [2023-11-06 22:45:28,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:28,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 406 [2023-11-06 22:45:28,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:30,200 INFO L124 PetriNetUnfolderBase]: 1407/2767 cut-off events. [2023-11-06 22:45:30,200 INFO L125 PetriNetUnfolderBase]: For 8839/8839 co-relation queries the response was YES. [2023-11-06 22:45:30,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13031 conditions, 2767 events. 1407/2767 cut-off events. For 8839/8839 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18379 event pairs, 248 based on Foata normal form. 92/2487 useless extension candidates. Maximal degree in co-relation 13004. Up to 865 conditions per place. [2023-11-06 22:45:30,233 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 199 selfloop transitions, 87 changer transitions 27/313 dead transitions. [2023-11-06 22:45:30,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 313 transitions, 3109 flow [2023-11-06 22:45:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:45:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:45:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4439 transitions. [2023-11-06 22:45:30,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39048205489092186 [2023-11-06 22:45:30,248 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4439 transitions. [2023-11-06 22:45:30,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4439 transitions. [2023-11-06 22:45:30,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:30,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4439 transitions. [2023-11-06 22:45:30,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 158.53571428571428) internal successors, (4439), 28 states have internal predecessors, (4439), 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) [2023-11-06 22:45:30,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:30,287 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:30,287 INFO L175 Difference]: Start difference. First operand has 72 places, 91 transitions, 723 flow. Second operand 28 states and 4439 transitions. [2023-11-06 22:45:30,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 313 transitions, 3109 flow [2023-11-06 22:45:30,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 313 transitions, 2884 flow, removed 111 selfloop flow, removed 5 redundant places. [2023-11-06 22:45:30,317 INFO L231 Difference]: Finished difference. Result has 98 places, 145 transitions, 1560 flow [2023-11-06 22:45:30,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1560, PETRI_PLACES=98, PETRI_TRANSITIONS=145} [2023-11-06 22:45:30,318 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2023-11-06 22:45:30,318 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 145 transitions, 1560 flow [2023-11-06 22:45:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 152.6206896551724) internal successors, (4426), 29 states have internal predecessors, (4426), 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) [2023-11-06 22:45:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:30,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:45:30,528 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:30,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash 890850370, now seen corresponding path program 1 times [2023-11-06 22:45:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935781798] [2023-11-06 22:45:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:30,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:32,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935781798] [2023-11-06 22:45:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935781798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290140760] [2023-11-06 22:45:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:32,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:32,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:32,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:45:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:32,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:45:32,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:32,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:32,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:32,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 22:45:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:45:32,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290140760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:32,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:32,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 3] total 16 [2023-11-06 22:45:32,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372967415] [2023-11-06 22:45:32,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:32,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:45:32,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:32,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:45:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:45:34,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 406 [2023-11-06 22:45:34,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 145 transitions, 1560 flow. Second operand has 18 states, 18 states have (on average 153.94444444444446) internal successors, (2771), 18 states have internal predecessors, (2771), 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) [2023-11-06 22:45:34,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:34,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 406 [2023-11-06 22:45:34,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:35,841 INFO L124 PetriNetUnfolderBase]: 1826/3568 cut-off events. [2023-11-06 22:45:35,841 INFO L125 PetriNetUnfolderBase]: For 16481/16481 co-relation queries the response was YES. [2023-11-06 22:45:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17975 conditions, 3568 events. 1826/3568 cut-off events. For 16481/16481 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23992 event pairs, 439 based on Foata normal form. 36/3227 useless extension candidates. Maximal degree in co-relation 17941. Up to 1194 conditions per place. [2023-11-06 22:45:35,885 INFO L140 encePairwiseOnDemand]: 396/406 looper letters, 164 selfloop transitions, 96 changer transitions 18/278 dead transitions. [2023-11-06 22:45:35,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 278 transitions, 3267 flow [2023-11-06 22:45:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:45:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:45:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3034 transitions. [2023-11-06 22:45:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39331086336530985 [2023-11-06 22:45:35,894 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3034 transitions. [2023-11-06 22:45:35,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3034 transitions. [2023-11-06 22:45:35,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:35,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3034 transitions. [2023-11-06 22:45:35,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.68421052631578) internal successors, (3034), 19 states have internal predecessors, (3034), 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) [2023-11-06 22:45:35,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:45:35,913 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:45:35,914 INFO L175 Difference]: Start difference. First operand has 98 places, 145 transitions, 1560 flow. Second operand 19 states and 3034 transitions. [2023-11-06 22:45:35,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 278 transitions, 3267 flow [2023-11-06 22:45:36,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 278 transitions, 3066 flow, removed 45 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:36,005 INFO L231 Difference]: Finished difference. Result has 112 places, 165 transitions, 1840 flow [2023-11-06 22:45:36,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1840, PETRI_PLACES=112, PETRI_TRANSITIONS=165} [2023-11-06 22:45:36,006 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 76 predicate places. [2023-11-06 22:45:36,006 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 165 transitions, 1840 flow [2023-11-06 22:45:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 153.94444444444446) internal successors, (2771), 18 states have internal predecessors, (2771), 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) [2023-11-06 22:45:36,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:36,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:36,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:45:36,213 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:36,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1178927323, now seen corresponding path program 1 times [2023-11-06 22:45:36,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:36,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968767732] [2023-11-06 22:45:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968767732] [2023-11-06 22:45:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968767732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518063197] [2023-11-06 22:45:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:36,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:36,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:45:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:36,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:45:36,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:37,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:37,411 INFO L322 Elim1Store]: treesize reduction 4, result has 95.9 percent of original size [2023-11-06 22:45:37,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 107 [2023-11-06 22:45:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:37,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518063197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:37,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:37,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-11-06 22:45:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450779671] [2023-11-06 22:45:37,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:37,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:45:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:45:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:45:40,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:42,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 406 [2023-11-06 22:45:42,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 165 transitions, 1840 flow. Second operand has 22 states, 22 states have (on average 150.0909090909091) internal successors, (3302), 22 states have internal predecessors, (3302), 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) [2023-11-06 22:45:42,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:42,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 406 [2023-11-06 22:45:42,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:45,066 INFO L124 PetriNetUnfolderBase]: 3155/6016 cut-off events. [2023-11-06 22:45:45,079 INFO L125 PetriNetUnfolderBase]: For 35048/35048 co-relation queries the response was YES. [2023-11-06 22:45:45,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30971 conditions, 6016 events. 3155/6016 cut-off events. For 35048/35048 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43226 event pairs, 750 based on Foata normal form. 382/5866 useless extension candidates. Maximal degree in co-relation 30936. Up to 3733 conditions per place. [2023-11-06 22:45:45,153 INFO L140 encePairwiseOnDemand]: 395/406 looper letters, 252 selfloop transitions, 172 changer transitions 55/479 dead transitions. [2023-11-06 22:45:45,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 479 transitions, 5895 flow [2023-11-06 22:45:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:45:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:45:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4328 transitions. [2023-11-06 22:45:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807178043631246 [2023-11-06 22:45:45,168 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4328 transitions. [2023-11-06 22:45:45,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4328 transitions. [2023-11-06 22:45:45,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:45,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4328 transitions. [2023-11-06 22:45:45,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 154.57142857142858) internal successors, (4328), 28 states have internal predecessors, (4328), 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) [2023-11-06 22:45:45,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:45,198 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 406.0) internal successors, (11774), 29 states have internal predecessors, (11774), 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) [2023-11-06 22:45:45,198 INFO L175 Difference]: Start difference. First operand has 112 places, 165 transitions, 1840 flow. Second operand 28 states and 4328 transitions. [2023-11-06 22:45:45,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 479 transitions, 5895 flow [2023-11-06 22:45:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 479 transitions, 5783 flow, removed 39 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:45,357 INFO L231 Difference]: Finished difference. Result has 141 places, 299 transitions, 4128 flow [2023-11-06 22:45:45,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4128, PETRI_PLACES=141, PETRI_TRANSITIONS=299} [2023-11-06 22:45:45,358 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 105 predicate places. [2023-11-06 22:45:45,358 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 299 transitions, 4128 flow [2023-11-06 22:45:45,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 150.0909090909091) internal successors, (3302), 22 states have internal predecessors, (3302), 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) [2023-11-06 22:45:45,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:45,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:45,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 22:45:45,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:45:45,566 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:45,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1246007118, now seen corresponding path program 1 times [2023-11-06 22:45:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012272529] [2023-11-06 22:45:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012272529] [2023-11-06 22:45:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012272529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359639553] [2023-11-06 22:45:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:46,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:46,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:46,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:45:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:46,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:45:46,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:46,390 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-06 22:45:46,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 27 [2023-11-06 22:45:46,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:45:46,608 INFO L322 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-11-06 22:45:46,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2023-11-06 22:45:46,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,733 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:46,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:49,892 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:49,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 22:45:49,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:49,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2635 treesize of output 2509 [2023-11-06 22:45:49,954 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:49,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 131 [2023-11-06 22:45:49,982 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:49,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2023-11-06 22:45:50,011 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:50,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 103 [2023-11-06 22:45:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359639553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:50,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2023-11-06 22:45:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132843995] [2023-11-06 22:45:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:50,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:45:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:45:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=663, Unknown=12, NotChecked=0, Total=812 [2023-11-06 22:45:51,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 406 [2023-11-06 22:45:51,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 299 transitions, 4128 flow. Second operand has 29 states, 29 states have (on average 122.72413793103448) internal successors, (3559), 29 states have internal predecessors, (3559), 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) [2023-11-06 22:45:51,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:51,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 406 [2023-11-06 22:45:51,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:53,800 INFO L124 PetriNetUnfolderBase]: 3169/6312 cut-off events. [2023-11-06 22:45:53,800 INFO L125 PetriNetUnfolderBase]: For 45417/45417 co-relation queries the response was YES. [2023-11-06 22:45:53,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34478 conditions, 6312 events. 3169/6312 cut-off events. For 45417/45417 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48996 event pairs, 1711 based on Foata normal form. 108/6002 useless extension candidates. Maximal degree in co-relation 34434. Up to 3940 conditions per place. [2023-11-06 22:45:53,866 INFO L140 encePairwiseOnDemand]: 398/406 looper letters, 317 selfloop transitions, 42 changer transitions 33/392 dead transitions. [2023-11-06 22:45:53,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 392 transitions, 5623 flow [2023-11-06 22:45:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:45:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:45:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1534 transitions. [2023-11-06 22:45:53,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148604269293924 [2023-11-06 22:45:53,870 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1534 transitions. [2023-11-06 22:45:53,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1534 transitions. [2023-11-06 22:45:53,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:53,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1534 transitions. [2023-11-06 22:45:53,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.83333333333333) internal successors, (1534), 12 states have internal predecessors, (1534), 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) [2023-11-06 22:45:53,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 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) [2023-11-06 22:45:53,879 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 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) [2023-11-06 22:45:53,879 INFO L175 Difference]: Start difference. First operand has 141 places, 299 transitions, 4128 flow. Second operand 12 states and 1534 transitions. [2023-11-06 22:45:53,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 392 transitions, 5623 flow [2023-11-06 22:45:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 392 transitions, 5394 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-11-06 22:45:54,223 INFO L231 Difference]: Finished difference. Result has 150 places, 278 transitions, 3664 flow [2023-11-06 22:45:54,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3664, PETRI_PLACES=150, PETRI_TRANSITIONS=278} [2023-11-06 22:45:54,225 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 114 predicate places. [2023-11-06 22:45:54,225 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 278 transitions, 3664 flow [2023-11-06 22:45:54,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 122.72413793103448) internal successors, (3559), 29 states have internal predecessors, (3559), 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) [2023-11-06 22:45:54,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:54,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:54,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-06 22:45:54,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:54,432 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:54,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2128819625, now seen corresponding path program 2 times [2023-11-06 22:45:54,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:54,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20800547] [2023-11-06 22:45:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:54,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:45:55,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20800547] [2023-11-06 22:45:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20800547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549013834] [2023-11-06 22:45:55,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:55,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:55,310 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:55,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:45:55,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:45:55,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:55,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:45:55,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:45:55,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:55,719 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:55,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 22:45:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:45:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549013834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:55,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:55,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 13 [2023-11-06 22:45:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952966029] [2023-11-06 22:45:55,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:55,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:45:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:45:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:45:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 406 [2023-11-06 22:45:57,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 278 transitions, 3664 flow. Second operand has 15 states, 15 states have (on average 158.33333333333334) internal successors, (2375), 15 states have internal predecessors, (2375), 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) [2023-11-06 22:45:57,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:57,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 406 [2023-11-06 22:45:57,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:59,137 INFO L124 PetriNetUnfolderBase]: 3718/7362 cut-off events. [2023-11-06 22:45:59,137 INFO L125 PetriNetUnfolderBase]: For 56302/56302 co-relation queries the response was YES. [2023-11-06 22:45:59,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39850 conditions, 7362 events. 3718/7362 cut-off events. For 56302/56302 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 57820 event pairs, 990 based on Foata normal form. 8/7100 useless extension candidates. Maximal degree in co-relation 39802. Up to 2649 conditions per place. [2023-11-06 22:45:59,230 INFO L140 encePairwiseOnDemand]: 397/406 looper letters, 342 selfloop transitions, 133 changer transitions 17/492 dead transitions. [2023-11-06 22:45:59,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 492 transitions, 6957 flow [2023-11-06 22:45:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:45:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:45:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3082 transitions. [2023-11-06 22:45:59,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39953331604874254 [2023-11-06 22:45:59,237 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3082 transitions. [2023-11-06 22:45:59,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3082 transitions. [2023-11-06 22:45:59,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:59,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3082 transitions. [2023-11-06 22:45:59,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.21052631578948) internal successors, (3082), 19 states have internal predecessors, (3082), 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) [2023-11-06 22:45:59,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:45:59,252 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:45:59,252 INFO L175 Difference]: Start difference. First operand has 150 places, 278 transitions, 3664 flow. Second operand 19 states and 3082 transitions. [2023-11-06 22:45:59,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 492 transitions, 6957 flow [2023-11-06 22:45:59,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 492 transitions, 6911 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-06 22:45:59,730 INFO L231 Difference]: Finished difference. Result has 165 places, 310 transitions, 4366 flow [2023-11-06 22:45:59,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4366, PETRI_PLACES=165, PETRI_TRANSITIONS=310} [2023-11-06 22:45:59,731 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 129 predicate places. [2023-11-06 22:45:59,732 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 310 transitions, 4366 flow [2023-11-06 22:45:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 158.33333333333334) internal successors, (2375), 15 states have internal predecessors, (2375), 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) [2023-11-06 22:45:59,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:59,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:59,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:59,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:59,939 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:45:59,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash 338175526, now seen corresponding path program 3 times [2023-11-06 22:45:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:59,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457446158] [2023-11-06 22:45:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:01,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457446158] [2023-11-06 22:46:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457446158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530382175] [2023-11-06 22:46:01,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:46:01,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:01,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:01,501 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:01,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:46:01,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:46:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:01,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:46:01,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:46:02,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:02,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:02,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 22:46:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:46:02,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530382175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:02,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:02,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 26 [2023-11-06 22:46:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640544032] [2023-11-06 22:46:02,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:02,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:46:02,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:46:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:46:07,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 406 [2023-11-06 22:46:07,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 310 transitions, 4366 flow. Second operand has 28 states, 28 states have (on average 142.75) internal successors, (3997), 28 states have internal predecessors, (3997), 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) [2023-11-06 22:46:07,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:07,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 406 [2023-11-06 22:46:07,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:10,959 INFO L124 PetriNetUnfolderBase]: 3800/7577 cut-off events. [2023-11-06 22:46:10,959 INFO L125 PetriNetUnfolderBase]: For 68822/68822 co-relation queries the response was YES. [2023-11-06 22:46:11,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42425 conditions, 7577 events. 3800/7577 cut-off events. For 68822/68822 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 60297 event pairs, 2215 based on Foata normal form. 8/7473 useless extension candidates. Maximal degree in co-relation 42374. Up to 5048 conditions per place. [2023-11-06 22:46:11,043 INFO L140 encePairwiseOnDemand]: 394/406 looper letters, 379 selfloop transitions, 47 changer transitions 40/466 dead transitions. [2023-11-06 22:46:11,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 466 transitions, 6802 flow [2023-11-06 22:46:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:46:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:46:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3228 transitions. [2023-11-06 22:46:11,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36139722346618897 [2023-11-06 22:46:11,051 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3228 transitions. [2023-11-06 22:46:11,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3228 transitions. [2023-11-06 22:46:11,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:11,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3228 transitions. [2023-11-06 22:46:11,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.72727272727272) internal successors, (3228), 22 states have internal predecessors, (3228), 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) [2023-11-06 22:46:11,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 406.0) internal successors, (9338), 23 states have internal predecessors, (9338), 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) [2023-11-06 22:46:11,067 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 406.0) internal successors, (9338), 23 states have internal predecessors, (9338), 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) [2023-11-06 22:46:11,067 INFO L175 Difference]: Start difference. First operand has 165 places, 310 transitions, 4366 flow. Second operand 22 states and 3228 transitions. [2023-11-06 22:46:11,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 466 transitions, 6802 flow [2023-11-06 22:46:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 466 transitions, 6488 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-11-06 22:46:11,458 INFO L231 Difference]: Finished difference. Result has 186 places, 324 transitions, 4427 flow [2023-11-06 22:46:11,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4427, PETRI_PLACES=186, PETRI_TRANSITIONS=324} [2023-11-06 22:46:11,460 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2023-11-06 22:46:11,460 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 324 transitions, 4427 flow [2023-11-06 22:46:11,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 142.75) internal successors, (3997), 28 states have internal predecessors, (3997), 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) [2023-11-06 22:46:11,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:11,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:11,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 22:46:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:46:11,667 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:46:11,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 321242075, now seen corresponding path program 2 times [2023-11-06 22:46:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:11,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418768408] [2023-11-06 22:46:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:11,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:46:12,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418768408] [2023-11-06 22:46:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418768408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782762578] [2023-11-06 22:46:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:12,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:12,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:46:12,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:12,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:12,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:46:12,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:12,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:46:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:46:12,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:46:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:46:12,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:46:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:46:13,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:13,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:13,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-11-06 22:46:13,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:13,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-11-06 22:46:13,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2023-11-06 22:46:13,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 22:46:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:46:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782762578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-06 22:46:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667748069] [2023-11-06 22:46:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:13,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:46:13,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:46:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=528, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:46:15,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 406 [2023-11-06 22:46:15,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 324 transitions, 4427 flow. Second operand has 25 states, 25 states have (on average 124.84) internal successors, (3121), 25 states have internal predecessors, (3121), 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) [2023-11-06 22:46:15,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:15,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 406 [2023-11-06 22:46:15,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:19,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:46:21,109 INFO L124 PetriNetUnfolderBase]: 4351/8562 cut-off events. [2023-11-06 22:46:21,109 INFO L125 PetriNetUnfolderBase]: For 74220/74220 co-relation queries the response was YES. [2023-11-06 22:46:21,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46861 conditions, 8562 events. 4351/8562 cut-off events. For 74220/74220 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 68206 event pairs, 1898 based on Foata normal form. 132/8592 useless extension candidates. Maximal degree in co-relation 46802. Up to 3048 conditions per place. [2023-11-06 22:46:21,181 INFO L140 encePairwiseOnDemand]: 395/406 looper letters, 379 selfloop transitions, 138 changer transitions 48/565 dead transitions. [2023-11-06 22:46:21,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 565 transitions, 8690 flow [2023-11-06 22:46:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:46:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:46:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2458 transitions. [2023-11-06 22:46:21,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3186414311641172 [2023-11-06 22:46:21,187 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2458 transitions. [2023-11-06 22:46:21,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2458 transitions. [2023-11-06 22:46:21,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:21,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2458 transitions. [2023-11-06 22:46:21,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 129.3684210526316) internal successors, (2458), 19 states have internal predecessors, (2458), 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) [2023-11-06 22:46:21,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:46:21,202 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:46:21,202 INFO L175 Difference]: Start difference. First operand has 186 places, 324 transitions, 4427 flow. Second operand 19 states and 2458 transitions. [2023-11-06 22:46:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 565 transitions, 8690 flow [2023-11-06 22:46:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 565 transitions, 8667 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 22:46:21,507 INFO L231 Difference]: Finished difference. Result has 206 places, 332 transitions, 5002 flow [2023-11-06 22:46:21,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5002, PETRI_PLACES=206, PETRI_TRANSITIONS=332} [2023-11-06 22:46:21,509 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 170 predicate places. [2023-11-06 22:46:21,509 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 332 transitions, 5002 flow [2023-11-06 22:46:21,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 124.84) internal successors, (3121), 25 states have internal predecessors, (3121), 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) [2023-11-06 22:46:21,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:21,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:21,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:46:21,716 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:46:21,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash 321242076, now seen corresponding path program 2 times [2023-11-06 22:46:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497350445] [2023-11-06 22:46:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:46:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497350445] [2023-11-06 22:46:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497350445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:22,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728731650] [2023-11-06 22:46:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:22,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:22,370 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:22,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:46:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:22,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:46:22,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:46:22,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:23,049 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:46:23,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 22:46:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:46:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728731650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:23,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:23,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 22:46:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339268104] [2023-11-06 22:46:23,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:23,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:46:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:46:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:46:25,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 406 [2023-11-06 22:46:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 332 transitions, 5002 flow. Second operand has 26 states, 26 states have (on average 152.84615384615384) internal successors, (3974), 26 states have internal predecessors, (3974), 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) [2023-11-06 22:46:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:25,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 406 [2023-11-06 22:46:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:28,889 INFO L124 PetriNetUnfolderBase]: 4318/8583 cut-off events. [2023-11-06 22:46:28,889 INFO L125 PetriNetUnfolderBase]: For 89819/89819 co-relation queries the response was YES. [2023-11-06 22:46:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49337 conditions, 8583 events. 4318/8583 cut-off events. For 89819/89819 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68496 event pairs, 1608 based on Foata normal form. 94/8601 useless extension candidates. Maximal degree in co-relation 49271. Up to 5684 conditions per place. [2023-11-06 22:46:29,021 INFO L140 encePairwiseOnDemand]: 398/406 looper letters, 345 selfloop transitions, 71 changer transitions 94/510 dead transitions. [2023-11-06 22:46:29,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 510 transitions, 7910 flow [2023-11-06 22:46:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:46:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:46:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2853 transitions. [2023-11-06 22:46:29,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39039408866995073 [2023-11-06 22:46:29,030 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2853 transitions. [2023-11-06 22:46:29,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2853 transitions. [2023-11-06 22:46:29,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:29,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2853 transitions. [2023-11-06 22:46:29,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.5) internal successors, (2853), 18 states have internal predecessors, (2853), 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) [2023-11-06 22:46:29,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 406.0) internal successors, (7714), 19 states have internal predecessors, (7714), 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) [2023-11-06 22:46:29,045 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 406.0) internal successors, (7714), 19 states have internal predecessors, (7714), 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) [2023-11-06 22:46:29,046 INFO L175 Difference]: Start difference. First operand has 206 places, 332 transitions, 5002 flow. Second operand 18 states and 2853 transitions. [2023-11-06 22:46:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 510 transitions, 7910 flow [2023-11-06 22:46:29,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 510 transitions, 7759 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-11-06 22:46:29,590 INFO L231 Difference]: Finished difference. Result has 216 places, 317 transitions, 4746 flow [2023-11-06 22:46:29,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4746, PETRI_PLACES=216, PETRI_TRANSITIONS=317} [2023-11-06 22:46:29,591 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 180 predicate places. [2023-11-06 22:46:29,592 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 317 transitions, 4746 flow [2023-11-06 22:46:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 152.84615384615384) internal successors, (3974), 26 states have internal predecessors, (3974), 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) [2023-11-06 22:46:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:29,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:29,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:29,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:29,793 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:46:29,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash 340251285, now seen corresponding path program 2 times [2023-11-06 22:46:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:29,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452429711] [2023-11-06 22:46:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:29,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:31,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452429711] [2023-11-06 22:46:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452429711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220140895] [2023-11-06 22:46:31,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:31,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:31,419 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:31,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:46:31,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:31,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:46:31,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:32,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:33,751 INFO L322 Elim1Store]: treesize reduction 4, result has 95.9 percent of original size [2023-11-06 22:46:33,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 107 [2023-11-06 22:46:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220140895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:35,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:35,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-11-06 22:46:35,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009019843] [2023-11-06 22:46:35,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 22:46:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 22:46:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:46:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 406 [2023-11-06 22:46:43,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 317 transitions, 4746 flow. Second operand has 42 states, 42 states have (on average 142.21428571428572) internal successors, (5973), 42 states have internal predecessors, (5973), 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) [2023-11-06 22:46:43,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:43,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 406 [2023-11-06 22:46:43,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:05,083 INFO L124 PetriNetUnfolderBase]: 5232/10064 cut-off events. [2023-11-06 22:47:05,083 INFO L125 PetriNetUnfolderBase]: For 113222/113222 co-relation queries the response was YES. [2023-11-06 22:47:05,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60607 conditions, 10064 events. 5232/10064 cut-off events. For 113222/113222 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 79936 event pairs, 935 based on Foata normal form. 66/9984 useless extension candidates. Maximal degree in co-relation 60538. Up to 6632 conditions per place. [2023-11-06 22:47:05,188 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 330 selfloop transitions, 247 changer transitions 64/641 dead transitions. [2023-11-06 22:47:05,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 641 transitions, 9770 flow [2023-11-06 22:47:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:47:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-06 22:47:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 8555 transitions. [2023-11-06 22:47:05,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2023-11-06 22:47:05,203 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 8555 transitions. [2023-11-06 22:47:05,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 8555 transitions. [2023-11-06 22:47:05,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:05,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 8555 transitions. [2023-11-06 22:47:05,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 145.0) internal successors, (8555), 59 states have internal predecessors, (8555), 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) [2023-11-06 22:47:05,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 406.0) internal successors, (24360), 60 states have internal predecessors, (24360), 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) [2023-11-06 22:47:05,242 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 406.0) internal successors, (24360), 60 states have internal predecessors, (24360), 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) [2023-11-06 22:47:05,243 INFO L175 Difference]: Start difference. First operand has 216 places, 317 transitions, 4746 flow. Second operand 59 states and 8555 transitions. [2023-11-06 22:47:05,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 641 transitions, 9770 flow [2023-11-06 22:47:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 641 transitions, 9601 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-11-06 22:47:05,739 INFO L231 Difference]: Finished difference. Result has 276 places, 478 transitions, 8157 flow [2023-11-06 22:47:05,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=8157, PETRI_PLACES=276, PETRI_TRANSITIONS=478} [2023-11-06 22:47:05,739 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 240 predicate places. [2023-11-06 22:47:05,739 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 478 transitions, 8157 flow [2023-11-06 22:47:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 142.21428571428572) internal successors, (5973), 42 states have internal predecessors, (5973), 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) [2023-11-06 22:47:05,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:05,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:05,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:05,944 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:47:05,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 340241055, now seen corresponding path program 3 times [2023-11-06 22:47:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527504077] [2023-11-06 22:47:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:47:06,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527504077] [2023-11-06 22:47:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527504077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452616982] [2023-11-06 22:47:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:47:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:06,491 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:06,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:47:06,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:47:06,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:06,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:47:06,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:47:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:47:06,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:47:06,890 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:47:06,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:47:06,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:47:06,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:47:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:07,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:47:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:07,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 22:47:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:07,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:07,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:07,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-11-06 22:47:07,912 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:07,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 165 [2023-11-06 22:47:07,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 140 [2023-11-06 22:47:07,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 116 [2023-11-06 22:47:07,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-11-06 22:47:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452616982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:08,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 22:47:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520688527] [2023-11-06 22:47:08,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:47:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:47:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=562, Unknown=5, NotChecked=0, Total=650 [2023-11-06 22:47:10,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:13,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:15,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 406 [2023-11-06 22:47:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 478 transitions, 8157 flow. Second operand has 26 states, 26 states have (on average 122.92307692307692) internal successors, (3196), 26 states have internal predecessors, (3196), 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) [2023-11-06 22:47:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 406 [2023-11-06 22:47:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:21,023 INFO L124 PetriNetUnfolderBase]: 6838/13128 cut-off events. [2023-11-06 22:47:21,023 INFO L125 PetriNetUnfolderBase]: For 184799/184799 co-relation queries the response was YES. [2023-11-06 22:47:21,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85837 conditions, 13128 events. 6838/13128 cut-off events. For 184799/184799 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 108317 event pairs, 2884 based on Foata normal form. 506/13366 useless extension candidates. Maximal degree in co-relation 85763. Up to 5601 conditions per place. [2023-11-06 22:47:21,567 INFO L140 encePairwiseOnDemand]: 397/406 looper letters, 577 selfloop transitions, 60 changer transitions 143/780 dead transitions. [2023-11-06 22:47:21,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 780 transitions, 14421 flow [2023-11-06 22:47:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:47:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:47:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2409 transitions. [2023-11-06 22:47:21,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31228934404977965 [2023-11-06 22:47:21,571 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2409 transitions. [2023-11-06 22:47:21,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2409 transitions. [2023-11-06 22:47:21,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:21,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2409 transitions. [2023-11-06 22:47:21,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.78947368421052) internal successors, (2409), 19 states have internal predecessors, (2409), 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) [2023-11-06 22:47:21,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:47:21,585 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 406.0) internal successors, (8120), 20 states have internal predecessors, (8120), 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) [2023-11-06 22:47:21,585 INFO L175 Difference]: Start difference. First operand has 276 places, 478 transitions, 8157 flow. Second operand 19 states and 2409 transitions. [2023-11-06 22:47:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 780 transitions, 14421 flow [2023-11-06 22:47:22,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 780 transitions, 14096 flow, removed 133 selfloop flow, removed 21 redundant places. [2023-11-06 22:47:22,669 INFO L231 Difference]: Finished difference. Result has 266 places, 388 transitions, 6389 flow [2023-11-06 22:47:22,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6389, PETRI_PLACES=266, PETRI_TRANSITIONS=388} [2023-11-06 22:47:22,670 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 230 predicate places. [2023-11-06 22:47:22,670 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 388 transitions, 6389 flow [2023-11-06 22:47:22,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 122.92307692307692) internal successors, (3196), 26 states have internal predecessors, (3196), 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) [2023-11-06 22:47:22,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:22,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:22,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:22,872 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:47:22,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash 33165131, now seen corresponding path program 3 times [2023-11-06 22:47:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:22,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186257622] [2023-11-06 22:47:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186257622] [2023-11-06 22:47:24,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186257622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962720944] [2023-11-06 22:47:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:47:24,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:24,602 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:47:24,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:47:24,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:24,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:47:24,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:25,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:47:25,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:47:25,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:47:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:47:25,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:26,351 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:26,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2023-11-06 22:47:26,368 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:47:26,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 143 [2023-11-06 22:47:26,384 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 22:47:26,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 112 [2023-11-06 22:47:26,408 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 22:47:26,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 49 [2023-11-06 22:47:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:47:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962720944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:26,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-06 22:47:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231863232] [2023-11-06 22:47:26,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:47:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:47:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1124, Unknown=1, NotChecked=0, Total=1332 [2023-11-06 22:47:29,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:32,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:35,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:37,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:39,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:47:41,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 406 [2023-11-06 22:47:41,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 388 transitions, 6389 flow. Second operand has 37 states, 37 states have (on average 124.4054054054054) internal successors, (4603), 37 states have internal predecessors, (4603), 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) [2023-11-06 22:47:41,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:41,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 406 [2023-11-06 22:47:41,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:51,702 INFO L124 PetriNetUnfolderBase]: 9934/18109 cut-off events. [2023-11-06 22:47:51,702 INFO L125 PetriNetUnfolderBase]: For 306083/306083 co-relation queries the response was YES. [2023-11-06 22:47:51,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127336 conditions, 18109 events. 9934/18109 cut-off events. For 306083/306083 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 150520 event pairs, 1480 based on Foata normal form. 274/18227 useless extension candidates. Maximal degree in co-relation 127265. Up to 5376 conditions per place. [2023-11-06 22:47:52,009 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 340 selfloop transitions, 461 changer transitions 71/872 dead transitions. [2023-11-06 22:47:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 872 transitions, 15172 flow [2023-11-06 22:47:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:47:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:47:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5696 transitions. [2023-11-06 22:47:52,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3188535602328706 [2023-11-06 22:47:52,020 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5696 transitions. [2023-11-06 22:47:52,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5696 transitions. [2023-11-06 22:47:52,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:52,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5696 transitions. [2023-11-06 22:47:52,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 129.45454545454547) internal successors, (5696), 44 states have internal predecessors, (5696), 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) [2023-11-06 22:47:52,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 406.0) internal successors, (18270), 45 states have internal predecessors, (18270), 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) [2023-11-06 22:47:52,057 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 406.0) internal successors, (18270), 45 states have internal predecessors, (18270), 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) [2023-11-06 22:47:52,057 INFO L175 Difference]: Start difference. First operand has 266 places, 388 transitions, 6389 flow. Second operand 44 states and 5696 transitions. [2023-11-06 22:47:52,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 872 transitions, 15172 flow [2023-11-06 22:47:54,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 872 transitions, 14748 flow, removed 111 selfloop flow, removed 22 redundant places. [2023-11-06 22:47:54,109 INFO L231 Difference]: Finished difference. Result has 269 places, 603 transitions, 12013 flow [2023-11-06 22:47:54,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=12013, PETRI_PLACES=269, PETRI_TRANSITIONS=603} [2023-11-06 22:47:54,110 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 233 predicate places. [2023-11-06 22:47:54,110 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 603 transitions, 12013 flow [2023-11-06 22:47:54,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 124.4054054054054) internal successors, (4603), 37 states have internal predecessors, (4603), 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) [2023-11-06 22:47:54,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:54,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:54,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:54,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:54,312 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:47:54,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash 30243072, now seen corresponding path program 3 times [2023-11-06 22:47:54,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:54,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444710363] [2023-11-06 22:47:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:55,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444710363] [2023-11-06 22:47:55,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444710363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:55,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085017463] [2023-11-06 22:47:55,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:47:55,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:55,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:55,598 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:55,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:47:55,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:47:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:55,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:47:55,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 22:47:55,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:56,056 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:47:56,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2023-11-06 22:47:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 22:47:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085017463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:56,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2023-11-06 22:47:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496413774] [2023-11-06 22:47:56,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:56,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:47:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:47:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:47:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 406 [2023-11-06 22:47:58,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 603 transitions, 12013 flow. Second operand has 17 states, 17 states have (on average 153.94117647058823) internal successors, (2617), 17 states have internal predecessors, (2617), 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) [2023-11-06 22:47:58,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:58,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 406 [2023-11-06 22:47:58,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:06,083 INFO L124 PetriNetUnfolderBase]: 11159/19998 cut-off events. [2023-11-06 22:48:06,083 INFO L125 PetriNetUnfolderBase]: For 494154/494154 co-relation queries the response was YES. [2023-11-06 22:48:06,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159309 conditions, 19998 events. 11159/19998 cut-off events. For 494154/494154 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 165033 event pairs, 2731 based on Foata normal form. 510/20320 useless extension candidates. Maximal degree in co-relation 159233. Up to 9206 conditions per place. [2023-11-06 22:48:06,470 INFO L140 encePairwiseOnDemand]: 396/406 looper letters, 545 selfloop transitions, 284 changer transitions 19/848 dead transitions. [2023-11-06 22:48:06,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 848 transitions, 18082 flow [2023-11-06 22:48:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:48:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:48:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3331 transitions. [2023-11-06 22:48:06,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39068730940652124 [2023-11-06 22:48:06,475 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3331 transitions. [2023-11-06 22:48:06,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3331 transitions. [2023-11-06 22:48:06,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:06,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3331 transitions. [2023-11-06 22:48:06,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 158.61904761904762) internal successors, (3331), 21 states have internal predecessors, (3331), 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) [2023-11-06 22:48:06,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 406.0) internal successors, (8932), 22 states have internal predecessors, (8932), 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) [2023-11-06 22:48:06,489 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 406.0) internal successors, (8932), 22 states have internal predecessors, (8932), 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) [2023-11-06 22:48:06,489 INFO L175 Difference]: Start difference. First operand has 269 places, 603 transitions, 12013 flow. Second operand 21 states and 3331 transitions. [2023-11-06 22:48:06,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 848 transitions, 18082 flow [2023-11-06 22:48:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 848 transitions, 15964 flow, removed 936 selfloop flow, removed 17 redundant places. [2023-11-06 22:48:11,810 INFO L231 Difference]: Finished difference. Result has 271 places, 650 transitions, 12459 flow [2023-11-06 22:48:11,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=10623, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12459, PETRI_PLACES=271, PETRI_TRANSITIONS=650} [2023-11-06 22:48:11,811 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 235 predicate places. [2023-11-06 22:48:11,811 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 650 transitions, 12459 flow [2023-11-06 22:48:11,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 153.94117647058823) internal successors, (2617), 17 states have internal predecessors, (2617), 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) [2023-11-06 22:48:11,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:11,812 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:11,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:12,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:12,012 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-06 22:48:12,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1968040665, now seen corresponding path program 4 times [2023-11-06 22:48:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:12,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582439546] [2023-11-06 22:48:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:13,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:13,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582439546] [2023-11-06 22:48:13,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582439546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:13,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289694654] [2023-11-06 22:48:13,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:48:13,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:13,829 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:13,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a839f923-4051-4819-a4a7-04dadc608df1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:48:14,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:48:14,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:14,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:48:14,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:48:14,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:14,243 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:48:14,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 22:48:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:48:14,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289694654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:14,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 21 [2023-11-06 22:48:14,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447299654] [2023-11-06 22:48:14,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:48:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:48:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:48:16,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 406 [2023-11-06 22:48:16,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 650 transitions, 12459 flow. Second operand has 23 states, 23 states have (on average 154.69565217391303) internal successors, (3558), 23 states have internal predecessors, (3558), 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) [2023-11-06 22:48:16,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:16,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 406 [2023-11-06 22:48:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand