./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:33:02,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:33:02,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:33:02,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:33:02,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:33:02,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:33:02,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:33:02,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:33:02,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:33:02,896 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:33:02,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:33:02,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:33:02,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:33:02,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:33:02,900 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:33:02,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:33:02,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:33:02,902 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:33:02,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:33:02,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:33:02,904 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:33:02,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:33:02,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:33:02,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:33:02,906 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:33:02,906 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:33:02,907 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:33:02,907 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:33:02,908 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:33:02,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:33:02,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:33:02,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:33:02,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:33:02,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:02,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:33:02,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:33:02,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:33:02,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:33:02,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:33:02,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:33:02,912 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:33:02,913 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:33:02,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:33:02,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:33:02,914 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_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 [2023-11-23 22:33:03,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:33:03,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:33:03,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:33:03,239 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:33:03,239 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:33:03,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/fib_unsafe-5.i [2023-11-23 22:33:06,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:33:06,888 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:33:06,889 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/sv-benchmarks/c/pthread/fib_unsafe-5.i [2023-11-23 22:33:06,910 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/data/3ca1053bd/ca9a69d0efcf4c34a6ea852a55036059/FLAGc1efdafc6 [2023-11-23 22:33:06,925 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/data/3ca1053bd/ca9a69d0efcf4c34a6ea852a55036059 [2023-11-23 22:33:06,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:33:06,930 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:33:06,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:06,932 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:33:06,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:33:06,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:06" (1/1) ... [2023-11-23 22:33:06,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747777da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:06, skipping insertion in model container [2023-11-23 22:33:06,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:06" (1/1) ... [2023-11-23 22:33:06,983 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:33:07,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:07,404 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:33:07,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:07,513 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:33:07,514 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:33:07,522 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:33:07,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07 WrapperNode [2023-11-23 22:33:07,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:07,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:07,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:33:07,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:33:07,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,644 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2023-11-23 22:33:07,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:07,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:33:07,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:33:07,646 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:33:07,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,664 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,690 INFO L189 HeapSplitter]: Split 4 memory accesses to 3 slices as follows [2, 1, 1] [2023-11-23 22:33:07,695 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,724 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:33:07,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:33:07,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:33:07,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:33:07,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (1/1) ... [2023-11-23 22:33:07,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:07,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:07,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:33:07,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:33:07,828 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:33:07,829 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:33:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:33:07,829 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:33:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:33:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:33:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:33:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:33:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:33:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:33:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:33:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:33:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:33:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:33:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:33:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:33:07,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:33:07,834 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:33:08,021 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:33:08,023 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:33:08,229 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:33:08,473 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:33:08,473 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:33:08,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:08 BoogieIcfgContainer [2023-11-23 22:33:08,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:33:08,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:33:08,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:33:08,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:33:08,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:33:06" (1/3) ... [2023-11-23 22:33:08,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1915b876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:08, skipping insertion in model container [2023-11-23 22:33:08,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:07" (2/3) ... [2023-11-23 22:33:08,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1915b876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:08, skipping insertion in model container [2023-11-23 22:33:08,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:08" (3/3) ... [2023-11-23 22:33:08,489 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2023-11-23 22:33:08,499 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:33:08,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:33:08,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-23 22:33:08,512 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:33:08,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:33:08,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 44 transitions, 96 flow [2023-11-23 22:33:08,689 INFO L124 PetriNetUnfolderBase]: 3/42 cut-off events. [2023-11-23 22:33:08,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:33:08,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 42 events. 3/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 117 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-23 22:33:08,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 44 transitions, 96 flow [2023-11-23 22:33:08,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 42 transitions, 90 flow [2023-11-23 22:33:08,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:33:08,732 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d969582, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:33:08,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-23 22:33:08,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:33:08,746 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-11-23 22:33:08,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:33:08,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:08,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:08,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:08,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2124757497, now seen corresponding path program 1 times [2023-11-23 22:33:08,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:08,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984815831] [2023-11-23 22:33:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:09,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984815831] [2023-11-23 22:33:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984815831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:09,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:09,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:09,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275598633] [2023-11-23 22:33:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:09,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:09,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:09,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:09,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:09,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:09,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:09,735 INFO L124 PetriNetUnfolderBase]: 657/1292 cut-off events. [2023-11-23 22:33:09,735 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:33:09,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2311 conditions, 1292 events. 657/1292 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8040 event pairs, 156 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 2295. Up to 514 conditions per place. [2023-11-23 22:33:09,758 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 46 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-23 22:33:09,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 249 flow [2023-11-23 22:33:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-23 22:33:09,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7670454545454546 [2023-11-23 22:33:09,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-23 22:33:09,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-23 22:33:09,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:09,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-23 22:33:09,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:09,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:09,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:09,803 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 90 flow. Second operand 4 states and 135 transitions. [2023-11-23 22:33:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 249 flow [2023-11-23 22:33:09,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:09,818 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 119 flow [2023-11-23 22:33:09,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-23 22:33:09,826 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-23 22:33:09,826 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 119 flow [2023-11-23 22:33:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:09,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:09,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:09,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:33:09,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:09,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1782477494, now seen corresponding path program 1 times [2023-11-23 22:33:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887294080] [2023-11-23 22:33:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887294080] [2023-11-23 22:33:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887294080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:09,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330393739] [2023-11-23 22:33:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:10,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:10,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:10,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:10,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:10,384 INFO L124 PetriNetUnfolderBase]: 885/1598 cut-off events. [2023-11-23 22:33:10,384 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-11-23 22:33:10,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1598 events. 885/1598 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9953 event pairs, 213 based on Foata normal form. 74/1372 useless extension candidates. Maximal degree in co-relation 3390. Up to 785 conditions per place. [2023-11-23 22:33:10,401 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 55 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-11-23 22:33:10,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 315 flow [2023-11-23 22:33:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-23 22:33:10,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7670454545454546 [2023-11-23 22:33:10,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-23 22:33:10,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-23 22:33:10,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:10,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-23 22:33:10,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,415 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 119 flow. Second operand 4 states and 135 transitions. [2023-11-23 22:33:10,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 315 flow [2023-11-23 22:33:10,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:33:10,421 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 143 flow [2023-11-23 22:33:10,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-23 22:33:10,423 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-11-23 22:33:10,423 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 143 flow [2023-11-23 22:33:10,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:10,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:10,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:33:10,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:10,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1804922460, now seen corresponding path program 1 times [2023-11-23 22:33:10,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:10,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572886212] [2023-11-23 22:33:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:10,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:10,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:10,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572886212] [2023-11-23 22:33:10,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572886212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:10,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:10,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:33:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415076297] [2023-11-23 22:33:10,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:10,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:33:10,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:33:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:33:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2023-11-23 22:33:10,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:10,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2023-11-23 22:33:10,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:10,914 INFO L124 PetriNetUnfolderBase]: 1133/2347 cut-off events. [2023-11-23 22:33:10,915 INFO L125 PetriNetUnfolderBase]: For 492/649 co-relation queries the response was YES. [2023-11-23 22:33:10,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4980 conditions, 2347 events. 1133/2347 cut-off events. For 492/649 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17404 event pairs, 365 based on Foata normal form. 106/2046 useless extension candidates. Maximal degree in co-relation 4960. Up to 993 conditions per place. [2023-11-23 22:33:10,939 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 44 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-23 22:33:10,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 300 flow [2023-11-23 22:33:10,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:33:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:33:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-23 22:33:10,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7727272727272727 [2023-11-23 22:33:10,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-23 22:33:10,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-23 22:33:10,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:10,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-23 22:33:10,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,945 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 143 flow. Second operand 3 states and 102 transitions. [2023-11-23 22:33:10,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 300 flow [2023-11-23 22:33:10,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:33:10,948 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 153 flow [2023-11-23 22:33:10,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-11-23 22:33:10,950 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-23 22:33:10,950 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 153 flow [2023-11-23 22:33:10,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:10,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:10,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:33:10,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:10,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -118021125, now seen corresponding path program 1 times [2023-11-23 22:33:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:10,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12473258] [2023-11-23 22:33:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:10,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:11,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12473258] [2023-11-23 22:33:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12473258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:11,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:11,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:33:11,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765656659] [2023-11-23 22:33:11,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:11,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:33:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:33:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:33:11,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2023-11-23 22:33:11,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:11,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2023-11-23 22:33:11,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:11,382 INFO L124 PetriNetUnfolderBase]: 1133/2310 cut-off events. [2023-11-23 22:33:11,383 INFO L125 PetriNetUnfolderBase]: For 616/773 co-relation queries the response was YES. [2023-11-23 22:33:11,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5137 conditions, 2310 events. 1133/2310 cut-off events. For 616/773 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16873 event pairs, 365 based on Foata normal form. 92/1995 useless extension candidates. Maximal degree in co-relation 5115. Up to 993 conditions per place. [2023-11-23 22:33:11,411 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 44 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-23 22:33:11,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 307 flow [2023-11-23 22:33:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:33:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:33:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-23 22:33:11,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7727272727272727 [2023-11-23 22:33:11,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-23 22:33:11,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-23 22:33:11,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:11,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-23 22:33:11,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,419 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 153 flow. Second operand 3 states and 102 transitions. [2023-11-23 22:33:11,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 307 flow [2023-11-23 22:33:11,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:33:11,423 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 159 flow [2023-11-23 22:33:11,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-23 22:33:11,425 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-23 22:33:11,425 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 159 flow [2023-11-23 22:33:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:11,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:33:11,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:11,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 653903621, now seen corresponding path program 1 times [2023-11-23 22:33:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914667593] [2023-11-23 22:33:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:11,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914667593] [2023-11-23 22:33:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914667593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:11,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:11,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982055877] [2023-11-23 22:33:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:11,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:11,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:11,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:11,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:11,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:11,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:12,211 INFO L124 PetriNetUnfolderBase]: 2065/3705 cut-off events. [2023-11-23 22:33:12,211 INFO L125 PetriNetUnfolderBase]: For 1351/1765 co-relation queries the response was YES. [2023-11-23 22:33:12,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8799 conditions, 3705 events. 2065/3705 cut-off events. For 1351/1765 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26312 event pairs, 457 based on Foata normal form. 255/3366 useless extension candidates. Maximal degree in co-relation 8775. Up to 2001 conditions per place. [2023-11-23 22:33:12,258 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 60 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-11-23 22:33:12,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 399 flow [2023-11-23 22:33:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2023-11-23 22:33:12,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7443181818181818 [2023-11-23 22:33:12,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2023-11-23 22:33:12,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2023-11-23 22:33:12,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:12,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2023-11-23 22:33:12,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,264 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,264 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 159 flow. Second operand 4 states and 131 transitions. [2023-11-23 22:33:12,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 399 flow [2023-11-23 22:33:12,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:12,273 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 179 flow [2023-11-23 22:33:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-23 22:33:12,278 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-11-23 22:33:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 179 flow [2023-11-23 22:33:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:12,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:33:12,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:12,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:12,281 INFO L85 PathProgramCache]: Analyzing trace with hash 636312731, now seen corresponding path program 1 times [2023-11-23 22:33:12,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:12,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195209358] [2023-11-23 22:33:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:12,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195209358] [2023-11-23 22:33:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195209358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:12,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:12,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:12,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764621677] [2023-11-23 22:33:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:12,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:12,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:12,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:12,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:12,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:12,873 INFO L124 PetriNetUnfolderBase]: 1601/3211 cut-off events. [2023-11-23 22:33:12,873 INFO L125 PetriNetUnfolderBase]: For 1181/1660 co-relation queries the response was YES. [2023-11-23 22:33:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 3211 events. 1601/3211 cut-off events. For 1181/1660 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 24157 event pairs, 227 based on Foata normal form. 337/2957 useless extension candidates. Maximal degree in co-relation 7692. Up to 1673 conditions per place. [2023-11-23 22:33:12,925 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 62 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-11-23 22:33:12,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 445 flow [2023-11-23 22:33:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2023-11-23 22:33:12,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7556818181818182 [2023-11-23 22:33:12,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 133 transitions. [2023-11-23 22:33:12,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 133 transitions. [2023-11-23 22:33:12,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:12,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 133 transitions. [2023-11-23 22:33:12,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,930 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,930 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 179 flow. Second operand 4 states and 133 transitions. [2023-11-23 22:33:12,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 445 flow [2023-11-23 22:33:12,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:33:12,937 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 197 flow [2023-11-23 22:33:12,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-11-23 22:33:12,942 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-11-23 22:33:12,942 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 197 flow [2023-11-23 22:33:12,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:12,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:12,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:33:12,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:12,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1160774394, now seen corresponding path program 1 times [2023-11-23 22:33:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:12,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343812750] [2023-11-23 22:33:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:12,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:13,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343812750] [2023-11-23 22:33:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343812750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:13,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648736615] [2023-11-23 22:33:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:13,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:13,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:13,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:13,495 INFO L124 PetriNetUnfolderBase]: 1121/2194 cut-off events. [2023-11-23 22:33:13,495 INFO L125 PetriNetUnfolderBase]: For 1435/1771 co-relation queries the response was YES. [2023-11-23 22:33:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 2194 events. 1121/2194 cut-off events. For 1435/1771 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14734 event pairs, 160 based on Foata normal form. 49/1932 useless extension candidates. Maximal degree in co-relation 5985. Up to 835 conditions per place. [2023-11-23 22:33:13,522 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-11-23 22:33:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 499 flow [2023-11-23 22:33:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:33:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2023-11-23 22:33:13,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318181818181818 [2023-11-23 22:33:13,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2023-11-23 22:33:13,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2023-11-23 22:33:13,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:13,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2023-11-23 22:33:13,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,529 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 197 flow. Second operand 5 states and 161 transitions. [2023-11-23 22:33:13,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 499 flow [2023-11-23 22:33:13,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:13,536 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 217 flow [2023-11-23 22:33:13,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-11-23 22:33:13,537 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2023-11-23 22:33:13,538 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 217 flow [2023-11-23 22:33:13,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:13,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:33:13,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:13,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash 345865615, now seen corresponding path program 1 times [2023-11-23 22:33:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559953640] [2023-11-23 22:33:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559953640] [2023-11-23 22:33:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559953640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051532264] [2023-11-23 22:33:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:13,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:13,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:13,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:13,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:13,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:14,104 INFO L124 PetriNetUnfolderBase]: 1167/2323 cut-off events. [2023-11-23 22:33:14,105 INFO L125 PetriNetUnfolderBase]: For 1787/2055 co-relation queries the response was YES. [2023-11-23 22:33:14,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6628 conditions, 2323 events. 1167/2323 cut-off events. For 1787/2055 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15992 event pairs, 223 based on Foata normal form. 79/2245 useless extension candidates. Maximal degree in co-relation 6595. Up to 1105 conditions per place. [2023-11-23 22:33:14,133 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-11-23 22:33:14,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 520 flow [2023-11-23 22:33:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:33:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2023-11-23 22:33:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7363636363636363 [2023-11-23 22:33:14,136 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:14,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,139 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 217 flow. Second operand 5 states and 162 transitions. [2023-11-23 22:33:14,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 520 flow [2023-11-23 22:33:14,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:14,146 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 242 flow [2023-11-23 22:33:14,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-11-23 22:33:14,147 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2023-11-23 22:33:14,147 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 242 flow [2023-11-23 22:33:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:14,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:14,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:33:14,149 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:14,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash 108763395, now seen corresponding path program 1 times [2023-11-23 22:33:14,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:14,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041962527] [2023-11-23 22:33:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041962527] [2023-11-23 22:33:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041962527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:14,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:14,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317997809] [2023-11-23 22:33:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:14,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:14,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:14,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:14,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:14,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:14,727 INFO L124 PetriNetUnfolderBase]: 1258/2463 cut-off events. [2023-11-23 22:33:14,727 INFO L125 PetriNetUnfolderBase]: For 2561/2850 co-relation queries the response was YES. [2023-11-23 22:33:14,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7423 conditions, 2463 events. 1258/2463 cut-off events. For 2561/2850 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16974 event pairs, 279 based on Foata normal form. 91/2376 useless extension candidates. Maximal degree in co-relation 7389. Up to 1236 conditions per place. [2023-11-23 22:33:14,759 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 65 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-11-23 22:33:14,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 560 flow [2023-11-23 22:33:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:33:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2023-11-23 22:33:14,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7363636363636363 [2023-11-23 22:33:14,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:14,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 162 transitions. [2023-11-23 22:33:14,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,765 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 242 flow. Second operand 5 states and 162 transitions. [2023-11-23 22:33:14,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 560 flow [2023-11-23 22:33:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 543 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:14,776 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 288 flow [2023-11-23 22:33:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2023-11-23 22:33:14,778 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2023-11-23 22:33:14,779 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 288 flow [2023-11-23 22:33:14,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:14,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:33:14,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:14,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 108763394, now seen corresponding path program 1 times [2023-11-23 22:33:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:14,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910673508] [2023-11-23 22:33:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:14,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910673508] [2023-11-23 22:33:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910673508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182039723] [2023-11-23 22:33:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:14,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:14,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:14,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:14,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:14,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:15,304 INFO L124 PetriNetUnfolderBase]: 1083/2162 cut-off events. [2023-11-23 22:33:15,304 INFO L125 PetriNetUnfolderBase]: For 3503/3753 co-relation queries the response was YES. [2023-11-23 22:33:15,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6783 conditions, 2162 events. 1083/2162 cut-off events. For 3503/3753 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14637 event pairs, 258 based on Foata normal form. 126/2208 useless extension candidates. Maximal degree in co-relation 6746. Up to 1229 conditions per place. [2023-11-23 22:33:15,331 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2023-11-23 22:33:15,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 490 flow [2023-11-23 22:33:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:33:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2023-11-23 22:33:15,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2023-11-23 22:33:15,332 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 148 transitions. [2023-11-23 22:33:15,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 148 transitions. [2023-11-23 22:33:15,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:15,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 148 transitions. [2023-11-23 22:33:15,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,335 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 288 flow. Second operand 5 states and 148 transitions. [2023-11-23 22:33:15,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 490 flow [2023-11-23 22:33:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 474 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:15,342 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 271 flow [2023-11-23 22:33:15,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-11-23 22:33:15,343 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2023-11-23 22:33:15,343 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 271 flow [2023-11-23 22:33:15,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:15,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:33:15,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:15,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 124818474, now seen corresponding path program 1 times [2023-11-23 22:33:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:15,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953206920] [2023-11-23 22:33:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953206920] [2023-11-23 22:33:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953206920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200722925] [2023-11-23 22:33:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:15,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:15,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:33:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:15,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:33:15,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:15,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200722925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 22:33:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905435959] [2023-11-23 22:33:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:33:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:33:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:33:15,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:15,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:15,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:15,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:15,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:16,130 INFO L124 PetriNetUnfolderBase]: 1453/2648 cut-off events. [2023-11-23 22:33:16,130 INFO L125 PetriNetUnfolderBase]: For 4578/4994 co-relation queries the response was YES. [2023-11-23 22:33:16,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8520 conditions, 2648 events. 1453/2648 cut-off events. For 4578/4994 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17601 event pairs, 311 based on Foata normal form. 134/2677 useless extension candidates. Maximal degree in co-relation 8484. Up to 1048 conditions per place. [2023-11-23 22:33:16,164 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 84 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-11-23 22:33:16,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 107 transitions, 695 flow [2023-11-23 22:33:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:33:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:33:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2023-11-23 22:33:16,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2023-11-23 22:33:16,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2023-11-23 22:33:16,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2023-11-23 22:33:16,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:16,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2023-11-23 22:33:16,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,170 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 271 flow. Second operand 6 states and 182 transitions. [2023-11-23 22:33:16,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 107 transitions, 695 flow [2023-11-23 22:33:16,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:16,180 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 268 flow [2023-11-23 22:33:16,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2023-11-23 22:33:16,182 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2023-11-23 22:33:16,182 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 268 flow [2023-11-23 22:33:16,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:16,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:16,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:16,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:33:16,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:16,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1592783038, now seen corresponding path program 1 times [2023-11-23 22:33:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:16,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135545880] [2023-11-23 22:33:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135545880] [2023-11-23 22:33:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135545880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427380884] [2023-11-23 22:33:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:16,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:16,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:16,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:33:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:16,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:33:16,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:16,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:16,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427380884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:16,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:16,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-23 22:33:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55766106] [2023-11-23 22:33:16,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:33:16,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 44 [2023-11-23 22:33:16,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:16,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:16,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 44 [2023-11-23 22:33:16,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:17,038 INFO L124 PetriNetUnfolderBase]: 1083/2400 cut-off events. [2023-11-23 22:33:17,038 INFO L125 PetriNetUnfolderBase]: For 4204/4383 co-relation queries the response was YES. [2023-11-23 22:33:17,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 2400 events. 1083/2400 cut-off events. For 4204/4383 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17853 event pairs, 187 based on Foata normal form. 119/2436 useless extension candidates. Maximal degree in co-relation 7096. Up to 1216 conditions per place. [2023-11-23 22:33:17,068 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-23 22:33:17,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 513 flow [2023-11-23 22:33:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-23 22:33:17,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2023-11-23 22:33:17,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-23 22:33:17,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-23 22:33:17,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:17,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-23 22:33:17,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,072 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 268 flow. Second operand 4 states and 120 transitions. [2023-11-23 22:33:17,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 513 flow [2023-11-23 22:33:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:17,079 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 263 flow [2023-11-23 22:33:17,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-11-23 22:33:17,080 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2023-11-23 22:33:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 263 flow [2023-11-23 22:33:17,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:17,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:17,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:17,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:33:17,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:17,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash -425594268, now seen corresponding path program 1 times [2023-11-23 22:33:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:17,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819556426] [2023-11-23 22:33:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:33:17,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:17,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819556426] [2023-11-23 22:33:17,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819556426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:17,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510442455] [2023-11-23 22:33:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:17,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2023-11-23 22:33:17,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:17,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2023-11-23 22:33:17,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:17,754 INFO L124 PetriNetUnfolderBase]: 1611/2891 cut-off events. [2023-11-23 22:33:17,754 INFO L125 PetriNetUnfolderBase]: For 5103/5472 co-relation queries the response was YES. [2023-11-23 22:33:17,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9388 conditions, 2891 events. 1611/2891 cut-off events. For 5103/5472 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19056 event pairs, 781 based on Foata normal form. 139/2980 useless extension candidates. Maximal degree in co-relation 9353. Up to 1547 conditions per place. [2023-11-23 22:33:17,789 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 68 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-23 22:33:17,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 589 flow [2023-11-23 22:33:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2023-11-23 22:33:17,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2023-11-23 22:33:17,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 124 transitions. [2023-11-23 22:33:17,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 124 transitions. [2023-11-23 22:33:17,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:17,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 124 transitions. [2023-11-23 22:33:17,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,793 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 263 flow. Second operand 4 states and 124 transitions. [2023-11-23 22:33:17,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 589 flow [2023-11-23 22:33:17,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 580 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:17,801 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 272 flow [2023-11-23 22:33:17,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-11-23 22:33:17,802 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2023-11-23 22:33:17,802 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 272 flow [2023-11-23 22:33:17,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:17,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:17,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:17,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:33:17,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:17,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2131633635, now seen corresponding path program 1 times [2023-11-23 22:33:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:17,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333583216] [2023-11-23 22:33:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:17,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333583216] [2023-11-23 22:33:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333583216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572750040] [2023-11-23 22:33:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:17,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:17,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:33:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:17,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:33:17,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:18,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572750040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:18,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:18,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-23 22:33:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317192408] [2023-11-23 22:33:18,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:33:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:33:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:33:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:18,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:19,101 INFO L124 PetriNetUnfolderBase]: 2907/6187 cut-off events. [2023-11-23 22:33:19,101 INFO L125 PetriNetUnfolderBase]: For 12171/12623 co-relation queries the response was YES. [2023-11-23 22:33:19,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18283 conditions, 6187 events. 2907/6187 cut-off events. For 12171/12623 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 50823 event pairs, 187 based on Foata normal form. 370/6492 useless extension candidates. Maximal degree in co-relation 18248. Up to 1217 conditions per place. [2023-11-23 22:33:19,180 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 129 selfloop transitions, 5 changer transitions 0/153 dead transitions. [2023-11-23 22:33:19,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 153 transitions, 1134 flow [2023-11-23 22:33:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:33:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:33:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2023-11-23 22:33:19,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7840909090909091 [2023-11-23 22:33:19,183 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 207 transitions. [2023-11-23 22:33:19,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 207 transitions. [2023-11-23 22:33:19,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:19,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 207 transitions. [2023-11-23 22:33:19,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:19,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:19,186 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:19,186 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 272 flow. Second operand 6 states and 207 transitions. [2023-11-23 22:33:19,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 153 transitions, 1134 flow [2023-11-23 22:33:19,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 153 transitions, 1118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:19,198 INFO L231 Difference]: Finished difference. Result has 80 places, 57 transitions, 300 flow [2023-11-23 22:33:19,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=80, PETRI_TRANSITIONS=57} [2023-11-23 22:33:19,199 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2023-11-23 22:33:19,199 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 57 transitions, 300 flow [2023-11-23 22:33:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:19,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:19,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:19,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:19,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:33:19,414 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:19,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash -47291238, now seen corresponding path program 1 times [2023-11-23 22:33:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:19,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731808722] [2023-11-23 22:33:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731808722] [2023-11-23 22:33:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731808722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631118221] [2023-11-23 22:33:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:19,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:19,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:19,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:33:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:19,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:33:19,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:19,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631118221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:19,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:19,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 22:33:19,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516960332] [2023-11-23 22:33:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:19,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:33:19,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:33:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:33:19,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:19,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 57 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:19,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:19,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:19,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:20,858 INFO L124 PetriNetUnfolderBase]: 3691/6634 cut-off events. [2023-11-23 22:33:20,859 INFO L125 PetriNetUnfolderBase]: For 14336/14750 co-relation queries the response was YES. [2023-11-23 22:33:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22157 conditions, 6634 events. 3691/6634 cut-off events. For 14336/14750 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 48625 event pairs, 815 based on Foata normal form. 162/6562 useless extension candidates. Maximal degree in co-relation 22118. Up to 2628 conditions per place. [2023-11-23 22:33:20,938 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 90 selfloop transitions, 5 changer transitions 0/111 dead transitions. [2023-11-23 22:33:20,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 812 flow [2023-11-23 22:33:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:33:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:33:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2023-11-23 22:33:20,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:33:20,941 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 176 transitions. [2023-11-23 22:33:20,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 176 transitions. [2023-11-23 22:33:20,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:20,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 176 transitions. [2023-11-23 22:33:20,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,944 INFO L175 Difference]: Start difference. First operand has 80 places, 57 transitions, 300 flow. Second operand 6 states and 176 transitions. [2023-11-23 22:33:20,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 812 flow [2023-11-23 22:33:20,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 770 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:20,960 INFO L231 Difference]: Finished difference. Result has 82 places, 56 transitions, 294 flow [2023-11-23 22:33:20,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=82, PETRI_TRANSITIONS=56} [2023-11-23 22:33:20,961 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2023-11-23 22:33:20,961 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 56 transitions, 294 flow [2023-11-23 22:33:20,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:20,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:20,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:20,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:21,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:33:21,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:21,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1656132935, now seen corresponding path program 1 times [2023-11-23 22:33:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612591316] [2023-11-23 22:33:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:21,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:21,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612591316] [2023-11-23 22:33:21,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612591316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:21,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601859668] [2023-11-23 22:33:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:21,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:21,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:33:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:21,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:33:21,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:21,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:21,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601859668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:21,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:21,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-23 22:33:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258021854] [2023-11-23 22:33:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:33:21,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:33:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:33:21,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:21,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 56 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:21,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:21,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:22,516 INFO L124 PetriNetUnfolderBase]: 3819/6572 cut-off events. [2023-11-23 22:33:22,516 INFO L125 PetriNetUnfolderBase]: For 15033/15240 co-relation queries the response was YES. [2023-11-23 22:33:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22487 conditions, 6572 events. 3819/6572 cut-off events. For 15033/15240 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 45250 event pairs, 1663 based on Foata normal form. 228/6431 useless extension candidates. Maximal degree in co-relation 22448. Up to 3155 conditions per place. [2023-11-23 22:33:22,589 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 53 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2023-11-23 22:33:22,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 553 flow [2023-11-23 22:33:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2023-11-23 22:33:22,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6420454545454546 [2023-11-23 22:33:22,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 113 transitions. [2023-11-23 22:33:22,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 113 transitions. [2023-11-23 22:33:22,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:22,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 113 transitions. [2023-11-23 22:33:22,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:22,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:22,593 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:22,593 INFO L175 Difference]: Start difference. First operand has 82 places, 56 transitions, 294 flow. Second operand 4 states and 113 transitions. [2023-11-23 22:33:22,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 553 flow [2023-11-23 22:33:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 547 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:22,614 INFO L231 Difference]: Finished difference. Result has 81 places, 55 transitions, 301 flow [2023-11-23 22:33:22,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2023-11-23 22:33:22,615 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 35 predicate places. [2023-11-23 22:33:22,616 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 301 flow [2023-11-23 22:33:22,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:22,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:22,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:22,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:33:22,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1817270937, now seen corresponding path program 1 times [2023-11-23 22:33:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958147696] [2023-11-23 22:33:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958147696] [2023-11-23 22:33:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958147696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720509840] [2023-11-23 22:33:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:22,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:22,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:33:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:23,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:33:23,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:23,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720509840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:23,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-23 22:33:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696661887] [2023-11-23 22:33:23,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:23,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:33:23,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:33:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:33:23,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:23,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 301 flow. Second operand has 14 states, 14 states have (on average 22.642857142857142) internal successors, (317), 14 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:23,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:23,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:23,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:27,398 INFO L124 PetriNetUnfolderBase]: 11247/21496 cut-off events. [2023-11-23 22:33:27,398 INFO L125 PetriNetUnfolderBase]: For 61176/62265 co-relation queries the response was YES. [2023-11-23 22:33:27,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76622 conditions, 21496 events. 11247/21496 cut-off events. For 61176/62265 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 192015 event pairs, 341 based on Foata normal form. 1442/22881 useless extension candidates. Maximal degree in co-relation 76581. Up to 4201 conditions per place. [2023-11-23 22:33:27,769 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 393 selfloop transitions, 71 changer transitions 0/480 dead transitions. [2023-11-23 22:33:27,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 480 transitions, 3831 flow [2023-11-23 22:33:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 22:33:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-23 22:33:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 905 transitions. [2023-11-23 22:33:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.734577922077922 [2023-11-23 22:33:27,778 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 905 transitions. [2023-11-23 22:33:27,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 905 transitions. [2023-11-23 22:33:27,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:27,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 905 transitions. [2023-11-23 22:33:27,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 32.32142857142857) internal successors, (905), 28 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:27,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 44.0) internal successors, (1276), 29 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:27,793 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 44.0) internal successors, (1276), 29 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:27,793 INFO L175 Difference]: Start difference. First operand has 81 places, 55 transitions, 301 flow. Second operand 28 states and 905 transitions. [2023-11-23 22:33:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 480 transitions, 3831 flow [2023-11-23 22:33:27,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 480 transitions, 3479 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:33:27,879 INFO L231 Difference]: Finished difference. Result has 121 places, 127 transitions, 1213 flow [2023-11-23 22:33:27,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1213, PETRI_PLACES=121, PETRI_TRANSITIONS=127} [2023-11-23 22:33:27,879 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2023-11-23 22:33:27,880 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 127 transitions, 1213 flow [2023-11-23 22:33:27,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.642857142857142) internal successors, (317), 14 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:27,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:27,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:27,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:28,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:33:28,094 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 872094804, now seen corresponding path program 1 times [2023-11-23 22:33:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:28,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808923371] [2023-11-23 22:33:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:28,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:28,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808923371] [2023-11-23 22:33:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808923371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628649943] [2023-11-23 22:33:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:28,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:28,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:28,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:33:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:28,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:33:28,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:28,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:28,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628649943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:28,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-23 22:33:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345479402] [2023-11-23 22:33:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:33:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:33:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:33:28,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:28,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 127 transitions, 1213 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:28,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:28,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:32,033 INFO L124 PetriNetUnfolderBase]: 9393/18472 cut-off events. [2023-11-23 22:33:32,033 INFO L125 PetriNetUnfolderBase]: For 195866/196888 co-relation queries the response was YES. [2023-11-23 22:33:32,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77821 conditions, 18472 events. 9393/18472 cut-off events. For 195866/196888 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 164975 event pairs, 1631 based on Foata normal form. 1656/19951 useless extension candidates. Maximal degree in co-relation 77762. Up to 6826 conditions per place. [2023-11-23 22:33:32,356 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 88 selfloop transitions, 27 changer transitions 0/131 dead transitions. [2023-11-23 22:33:32,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 131 transitions, 1336 flow [2023-11-23 22:33:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:33:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:33:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2023-11-23 22:33:32,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2023-11-23 22:33:32,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 173 transitions. [2023-11-23 22:33:32,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 173 transitions. [2023-11-23 22:33:32,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:32,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 173 transitions. [2023-11-23 22:33:32,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:32,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:32,360 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:32,361 INFO L175 Difference]: Start difference. First operand has 121 places, 127 transitions, 1213 flow. Second operand 6 states and 173 transitions. [2023-11-23 22:33:32,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 131 transitions, 1336 flow [2023-11-23 22:33:33,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 131 transitions, 1087 flow, removed 99 selfloop flow, removed 13 redundant places. [2023-11-23 22:33:33,872 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 682 flow [2023-11-23 22:33:33,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2023-11-23 22:33:33,873 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-11-23 22:33:33,874 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 682 flow [2023-11-23 22:33:33,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:33,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:33,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:33,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:33:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:33:34,097 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:34,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1466028033, now seen corresponding path program 1 times [2023-11-23 22:33:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:34,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942231498] [2023-11-23 22:33:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:33:34,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942231498] [2023-11-23 22:33:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942231498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:34,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:34,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838688647] [2023-11-23 22:33:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:34,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2023-11-23 22:33:34,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 682 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:34,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:34,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2023-11-23 22:33:34,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:38,381 INFO L124 PetriNetUnfolderBase]: 14883/25342 cut-off events. [2023-11-23 22:33:38,382 INFO L125 PetriNetUnfolderBase]: For 158181/159246 co-relation queries the response was YES. [2023-11-23 22:33:38,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98669 conditions, 25342 events. 14883/25342 cut-off events. For 158181/159246 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 210728 event pairs, 5592 based on Foata normal form. 864/25540 useless extension candidates. Maximal degree in co-relation 98618. Up to 11443 conditions per place. [2023-11-23 22:33:38,721 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 145 selfloop transitions, 6 changer transitions 0/165 dead transitions. [2023-11-23 22:33:38,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 165 transitions, 1486 flow [2023-11-23 22:33:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-23 22:33:38,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2023-11-23 22:33:38,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-23 22:33:38,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-23 22:33:38,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:38,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-23 22:33:38,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:38,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:38,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:38,726 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 682 flow. Second operand 4 states and 116 transitions. [2023-11-23 22:33:38,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 165 transitions, 1486 flow [2023-11-23 22:33:39,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1457 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-23 22:33:39,274 INFO L231 Difference]: Finished difference. Result has 108 places, 95 transitions, 681 flow [2023-11-23 22:33:39,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=681, PETRI_PLACES=108, PETRI_TRANSITIONS=95} [2023-11-23 22:33:39,275 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2023-11-23 22:33:39,275 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 95 transitions, 681 flow [2023-11-23 22:33:39,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:39,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:39,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:39,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 22:33:39,276 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:39,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash 199486861, now seen corresponding path program 1 times [2023-11-23 22:33:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:39,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188886116] [2023-11-23 22:33:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:39,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:33:39,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:39,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188886116] [2023-11-23 22:33:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188886116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:39,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:33:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322087655] [2023-11-23 22:33:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:39,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2023-11-23 22:33:39,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 95 transitions, 681 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:39,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:39,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2023-11-23 22:33:39,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:43,626 INFO L124 PetriNetUnfolderBase]: 11993/21452 cut-off events. [2023-11-23 22:33:43,626 INFO L125 PetriNetUnfolderBase]: For 186734/186734 co-relation queries the response was YES. [2023-11-23 22:33:43,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85452 conditions, 21452 events. 11993/21452 cut-off events. For 186734/186734 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 180412 event pairs, 2570 based on Foata normal form. 0/21083 useless extension candidates. Maximal degree in co-relation 85402. Up to 9373 conditions per place. [2023-11-23 22:33:43,903 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 194 selfloop transitions, 9 changer transitions 0/219 dead transitions. [2023-11-23 22:33:43,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 219 transitions, 2147 flow [2023-11-23 22:33:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:33:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:33:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-23 22:33:43,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2023-11-23 22:33:43,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-23 22:33:43,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-23 22:33:43,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:43,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-23 22:33:43,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:43,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:43,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:43,907 INFO L175 Difference]: Start difference. First operand has 108 places, 95 transitions, 681 flow. Second operand 4 states and 119 transitions. [2023-11-23 22:33:43,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 219 transitions, 2147 flow [2023-11-23 22:33:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 219 transitions, 2135 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:44,148 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 695 flow [2023-11-23 22:33:44,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=695, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2023-11-23 22:33:44,149 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-11-23 22:33:44,149 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 695 flow [2023-11-23 22:33:44,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:44,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:44,149 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:44,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 22:33:44,149 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:44,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1835742971, now seen corresponding path program 1 times [2023-11-23 22:33:44,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356740718] [2023-11-23 22:33:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:44,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:44,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356740718] [2023-11-23 22:33:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356740718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005085738] [2023-11-23 22:33:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:44,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:44,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:33:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:44,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:33:44,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:44,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005085738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-23 22:33:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047350586] [2023-11-23 22:33:44,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:44,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:33:44,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:33:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:33:44,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:44,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 695 flow. Second operand has 17 states, 17 states have (on average 22.529411764705884) internal successors, (383), 17 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:44,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:44,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:44,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:33:49,930 INFO L124 PetriNetUnfolderBase]: 13285/25710 cut-off events. [2023-11-23 22:33:49,930 INFO L125 PetriNetUnfolderBase]: For 259938/259938 co-relation queries the response was YES. [2023-11-23 22:33:50,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105653 conditions, 25710 events. 13285/25710 cut-off events. For 259938/259938 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 235901 event pairs, 539 based on Foata normal form. 908/26435 useless extension candidates. Maximal degree in co-relation 105599. Up to 7399 conditions per place. [2023-11-23 22:33:50,270 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 304 selfloop transitions, 54 changer transitions 0/374 dead transitions. [2023-11-23 22:33:50,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 374 transitions, 3182 flow [2023-11-23 22:33:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 22:33:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-23 22:33:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 652 transitions. [2023-11-23 22:33:50,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7056277056277056 [2023-11-23 22:33:50,274 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 652 transitions. [2023-11-23 22:33:50,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 652 transitions. [2023-11-23 22:33:50,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:33:50,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 652 transitions. [2023-11-23 22:33:50,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 31.047619047619047) internal successors, (652), 21 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 44.0) internal successors, (968), 22 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,279 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 44.0) internal successors, (968), 22 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,279 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 695 flow. Second operand 21 states and 652 transitions. [2023-11-23 22:33:50,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 374 transitions, 3182 flow [2023-11-23 22:33:50,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 374 transitions, 2962 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-23 22:33:50,941 INFO L231 Difference]: Finished difference. Result has 132 places, 116 transitions, 1083 flow [2023-11-23 22:33:50,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1083, PETRI_PLACES=132, PETRI_TRANSITIONS=116} [2023-11-23 22:33:50,942 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 86 predicate places. [2023-11-23 22:33:50,942 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 116 transitions, 1083 flow [2023-11-23 22:33:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.529411764705884) internal successors, (383), 17 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:33:50,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:50,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 22:33:51,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 22:33:51,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 22:33:51,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:51,146 INFO L85 PathProgramCache]: Analyzing trace with hash 785185942, now seen corresponding path program 1 times [2023-11-23 22:33:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:51,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253227118] [2023-11-23 22:33:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253227118] [2023-11-23 22:33:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253227118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756417358] [2023-11-23 22:33:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:51,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:51,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3ebd3c-dad9-4e69-b2ed-9bc3dc826041/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:33:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:51,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:33:51,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:51,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756417358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:51,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:33:51,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-23 22:33:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072537138] [2023-11-23 22:33:51,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:51,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 22:33:51,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:51,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:33:51,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:33:51,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 44 [2023-11-23 22:33:51,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 116 transitions, 1083 flow. Second operand has 20 states, 20 states have (on average 22.45) internal successors, (449), 20 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:51,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:33:51,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 44 [2023-11-23 22:33:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand