./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:54:39,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:54:39,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:54:39,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:54:39,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:54:39,768 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:54:39,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:54:39,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:54:39,772 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:54:39,777 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:54:39,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:54:39,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:54:39,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:54:39,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:54:39,783 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:54:39,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:54:39,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:54:39,785 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:54:39,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:54:39,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:54:39,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:54:39,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:54:39,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:54:39,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:54:39,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:54:39,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:54:39,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:54:39,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:54:39,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:54:39,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:54:39,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:54:39,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:39,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:54:39,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:54:39,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:54:39,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:54:39,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:54:39,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:54:39,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:54:39,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:54:39,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:54:39,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:54:39,807 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_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2023-11-26 11:54:40,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:54:40,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:54:40,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:54:40,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:54:40,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:54:40,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-26 11:54:43,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:54:43,539 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:54:43,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-26 11:54:43,553 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/data/749b8c13a/b22190cb3fd9434f964d9dedbe6bd6c0/FLAG3af5ff15e [2023-11-26 11:54:43,577 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/data/749b8c13a/b22190cb3fd9434f964d9dedbe6bd6c0 [2023-11-26 11:54:43,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:54:43,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:54:43,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:43,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:54:43,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:54:43,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:43,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189dfe21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43, skipping insertion in model container [2023-11-26 11:54:43,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:43,623 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:54:43,870 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2023-11-26 11:54:43,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:43,910 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:54:43,964 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2023-11-26 11:54:43,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:43,985 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:54:43,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43 WrapperNode [2023-11-26 11:54:43,985 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:43,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:43,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:54:43,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:54:43,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,040 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 181 [2023-11-26 11:54:44,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:44,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:54:44,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:54:44,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:54:44,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,075 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 2, 2, 10]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-26 11:54:44,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:54:44,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:54:44,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:54:44,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:54:44,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (1/1) ... [2023-11-26 11:54:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:44,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:54:44,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:54:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:54:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:54:44,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:54:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:54:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:54:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:54:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:54:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:54:44,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:54:44,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:54:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:54:44,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:54:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:54:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:54:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:54:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:54:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:54:44,227 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:54:44,421 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:54:44,423 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:54:44,808 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:54:45,182 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:54:45,183 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:54:45,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:45 BoogieIcfgContainer [2023-11-26 11:54:45,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:54:45,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:54:45,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:54:45,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:54:45,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:54:43" (1/3) ... [2023-11-26 11:54:45,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213a890d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:45, skipping insertion in model container [2023-11-26 11:54:45,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:43" (2/3) ... [2023-11-26 11:54:45,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213a890d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:45, skipping insertion in model container [2023-11-26 11:54:45,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:45" (3/3) ... [2023-11-26 11:54:45,196 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2023-11-26 11:54:45,205 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:54:45,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:54:45,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:54:45,216 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:54:45,269 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:54:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2023-11-26 11:54:45,333 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-26 11:54:45,333 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:54:45,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-26 11:54:45,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2023-11-26 11:54:45,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2023-11-26 11:54:45,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:54:45,357 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;@8516dbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:54:45,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:54:45,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:54:45,370 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-26 11:54:45,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:54:45,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:45,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:45,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1337970255, now seen corresponding path program 1 times [2023-11-26 11:54:45,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:45,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483109006] [2023-11-26 11:54:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483109006] [2023-11-26 11:54:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483109006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:45,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:45,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574212347] [2023-11-26 11:54:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:45,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:45,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:45,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:45,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:46,080 INFO L124 PetriNetUnfolderBase]: 232/386 cut-off events. [2023-11-26 11:54:46,080 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-26 11:54:46,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 386 events. 232/386 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1260 event pairs, 72 based on Foata normal form. 4/292 useless extension candidates. Maximal degree in co-relation 660. Up to 194 conditions per place. [2023-11-26 11:54:46,087 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 47 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-26 11:54:46,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 234 flow [2023-11-26 11:54:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2023-11-26 11:54:46,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2023-11-26 11:54:46,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 68 transitions. [2023-11-26 11:54:46,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 68 transitions. [2023-11-26 11:54:46,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:46,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 68 transitions. [2023-11-26 11:54:46,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,119 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 5 states and 68 transitions. [2023-11-26 11:54:46,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 234 flow [2023-11-26 11:54:46,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:54:46,126 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-26 11:54:46,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-26 11:54:46,135 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-26 11:54:46,135 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-26 11:54:46,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:46,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:54:46,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:46,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1652654709, now seen corresponding path program 2 times [2023-11-26 11:54:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138440385] [2023-11-26 11:54:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:46,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138440385] [2023-11-26 11:54:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138440385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:46,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:46,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616154927] [2023-11-26 11:54:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:46,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:46,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:46,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:46,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:46,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:46,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:46,695 INFO L124 PetriNetUnfolderBase]: 496/856 cut-off events. [2023-11-26 11:54:46,695 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-11-26 11:54:46,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 856 events. 496/856 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3905 event pairs, 174 based on Foata normal form. 6/765 useless extension candidates. Maximal degree in co-relation 600. Up to 384 conditions per place. [2023-11-26 11:54:46,708 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 55 selfloop transitions, 5 changer transitions 2/63 dead transitions. [2023-11-26 11:54:46,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 63 transitions, 305 flow [2023-11-26 11:54:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2023-11-26 11:54:46,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2023-11-26 11:54:46,714 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 72 transitions. [2023-11-26 11:54:46,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 72 transitions. [2023-11-26 11:54:46,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:46,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 72 transitions. [2023-11-26 11:54:46,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,725 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 5 states and 72 transitions. [2023-11-26 11:54:46,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 63 transitions, 305 flow [2023-11-26 11:54:46,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 63 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:54:46,732 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 98 flow [2023-11-26 11:54:46,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-26 11:54:46,737 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-11-26 11:54:46,740 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 98 flow [2023-11-26 11:54:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:46,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:46,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:54:46,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:46,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1393375913, now seen corresponding path program 3 times [2023-11-26 11:54:46,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:46,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169415405] [2023-11-26 11:54:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:46,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169415405] [2023-11-26 11:54:46,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169415405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:46,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743151195] [2023-11-26 11:54:46,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:46,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:46,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:46,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:46,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:46,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:47,192 INFO L124 PetriNetUnfolderBase]: 646/1115 cut-off events. [2023-11-26 11:54:47,192 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-26 11:54:47,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 1115 events. 646/1115 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5195 event pairs, 239 based on Foata normal form. 20/1134 useless extension candidates. Maximal degree in co-relation 1506. Up to 819 conditions per place. [2023-11-26 11:54:47,204 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 47 selfloop transitions, 4 changer transitions 4/56 dead transitions. [2023-11-26 11:54:47,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 290 flow [2023-11-26 11:54:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:54:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:54:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2023-11-26 11:54:47,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2023-11-26 11:54:47,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 62 transitions. [2023-11-26 11:54:47,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 62 transitions. [2023-11-26 11:54:47,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:47,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 62 transitions. [2023-11-26 11:54:47,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,210 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 98 flow. Second operand 4 states and 62 transitions. [2023-11-26 11:54:47,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 290 flow [2023-11-26 11:54:47,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:54:47,214 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 136 flow [2023-11-26 11:54:47,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-26 11:54:47,215 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-11-26 11:54:47,216 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 136 flow [2023-11-26 11:54:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:47,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:54:47,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:47,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1763323959, now seen corresponding path program 4 times [2023-11-26 11:54:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:47,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772434554] [2023-11-26 11:54:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:47,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:47,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:47,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772434554] [2023-11-26 11:54:47,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772434554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:47,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:47,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733277768] [2023-11-26 11:54:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:47,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:47,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:47,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:47,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:47,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:47,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:47,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:47,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:47,573 INFO L124 PetriNetUnfolderBase]: 666/1140 cut-off events. [2023-11-26 11:54:47,573 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-11-26 11:54:47,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2904 conditions, 1140 events. 666/1140 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5320 event pairs, 219 based on Foata normal form. 26/1164 useless extension candidates. Maximal degree in co-relation 1203. Up to 855 conditions per place. [2023-11-26 11:54:47,583 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 49 selfloop transitions, 6 changer transitions 2/58 dead transitions. [2023-11-26 11:54:47,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 339 flow [2023-11-26 11:54:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:54:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:54:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2023-11-26 11:54:47,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2023-11-26 11:54:47,586 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 60 transitions. [2023-11-26 11:54:47,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 60 transitions. [2023-11-26 11:54:47,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:47,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 60 transitions. [2023-11-26 11:54:47,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,589 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,589 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 136 flow. Second operand 4 states and 60 transitions. [2023-11-26 11:54:47,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 339 flow [2023-11-26 11:54:47,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 339 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:54:47,594 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 196 flow [2023-11-26 11:54:47,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-26 11:54:47,595 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-26 11:54:47,596 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 196 flow [2023-11-26 11:54:47,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:47,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:47,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:54:47,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:47,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1190442195, now seen corresponding path program 1 times [2023-11-26 11:54:47,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:47,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147180715] [2023-11-26 11:54:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:47,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:47,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147180715] [2023-11-26 11:54:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147180715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:47,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10417586] [2023-11-26 11:54:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:47,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:47,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:47,947 INFO L124 PetriNetUnfolderBase]: 596/1016 cut-off events. [2023-11-26 11:54:47,947 INFO L125 PetriNetUnfolderBase]: For 1229/1229 co-relation queries the response was YES. [2023-11-26 11:54:47,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 1016 events. 596/1016 cut-off events. For 1229/1229 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4638 event pairs, 200 based on Foata normal form. 16/1030 useless extension candidates. Maximal degree in co-relation 1301. Up to 510 conditions per place. [2023-11-26 11:54:47,957 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 58 selfloop transitions, 8 changer transitions 4/71 dead transitions. [2023-11-26 11:54:47,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 459 flow [2023-11-26 11:54:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:54:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:54:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-26 11:54:47,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5948275862068966 [2023-11-26 11:54:47,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-26 11:54:47,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-26 11:54:47,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:47,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-26 11:54:47,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,967 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 196 flow. Second operand 4 states and 69 transitions. [2023-11-26 11:54:47,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 459 flow [2023-11-26 11:54:47,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 453 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-26 11:54:47,978 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 212 flow [2023-11-26 11:54:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-26 11:54:47,982 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-11-26 11:54:47,982 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 212 flow [2023-11-26 11:54:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:47,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:47,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:47,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:54:47,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1309014833, now seen corresponding path program 1 times [2023-11-26 11:54:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165043719] [2023-11-26 11:54:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165043719] [2023-11-26 11:54:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165043719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:48,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20571119] [2023-11-26 11:54:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:48,327 INFO L124 PetriNetUnfolderBase]: 530/894 cut-off events. [2023-11-26 11:54:48,328 INFO L125 PetriNetUnfolderBase]: For 1480/1480 co-relation queries the response was YES. [2023-11-26 11:54:48,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 894 events. 530/894 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3768 event pairs, 212 based on Foata normal form. 20/912 useless extension candidates. Maximal degree in co-relation 2441. Up to 474 conditions per place. [2023-11-26 11:54:48,338 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 55 selfloop transitions, 8 changer transitions 2/66 dead transitions. [2023-11-26 11:54:48,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 459 flow [2023-11-26 11:54:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:54:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:54:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-26 11:54:48,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2023-11-26 11:54:48,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-26 11:54:48,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-26 11:54:48,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:48,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-26 11:54:48,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,344 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,344 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 212 flow. Second operand 4 states and 65 transitions. [2023-11-26 11:54:48,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 459 flow [2023-11-26 11:54:48,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 433 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-26 11:54:48,350 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 216 flow [2023-11-26 11:54:48,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-26 11:54:48,354 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-11-26 11:54:48,355 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 216 flow [2023-11-26 11:54:48,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:48,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:48,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:54:48,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:48,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1914569799, now seen corresponding path program 1 times [2023-11-26 11:54:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146130590] [2023-11-26 11:54:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146130590] [2023-11-26 11:54:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146130590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:48,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:48,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309882332] [2023-11-26 11:54:48,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:54:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:54:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:54:48,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:48,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:48,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:48,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:48,618 INFO L124 PetriNetUnfolderBase]: 528/890 cut-off events. [2023-11-26 11:54:48,618 INFO L125 PetriNetUnfolderBase]: For 1423/1423 co-relation queries the response was YES. [2023-11-26 11:54:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 890 events. 528/890 cut-off events. For 1423/1423 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3711 event pairs, 358 based on Foata normal form. 0/888 useless extension candidates. Maximal degree in co-relation 1750. Up to 882 conditions per place. [2023-11-26 11:54:48,627 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-11-26 11:54:48,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 298 flow [2023-11-26 11:54:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:54:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:54:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2023-11-26 11:54:48,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2023-11-26 11:54:48,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2023-11-26 11:54:48,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2023-11-26 11:54:48,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:48,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2023-11-26 11:54:48,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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) [2023-11-26 11:54:48,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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) [2023-11-26 11:54:48,631 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 216 flow. Second operand 3 states and 38 transitions. [2023-11-26 11:54:48,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 298 flow [2023-11-26 11:54:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 286 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 11:54:48,637 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 226 flow [2023-11-26 11:54:48,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-26 11:54:48,639 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2023-11-26 11:54:48,639 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 226 flow [2023-11-26 11:54:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:48,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:48,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:54:48,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:48,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1172311652, now seen corresponding path program 1 times [2023-11-26 11:54:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962725243] [2023-11-26 11:54:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:54:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962725243] [2023-11-26 11:54:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962725243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762446503] [2023-11-26 11:54:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:48,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:48,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:54:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:48,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:54:48,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:54:49,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:54:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762446503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:49,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:49,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-26 11:54:49,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639056879] [2023-11-26 11:54:49,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:49,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:54:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:54:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:54:49,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:49,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:49,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:49,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:49,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:49,268 INFO L124 PetriNetUnfolderBase]: 528/896 cut-off events. [2023-11-26 11:54:49,268 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2023-11-26 11:54:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 896 events. 528/896 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3707 event pairs, 358 based on Foata normal form. 3/898 useless extension candidates. Maximal degree in co-relation 2600. Up to 882 conditions per place. [2023-11-26 11:54:49,278 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 10 changer transitions 0/46 dead transitions. [2023-11-26 11:54:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 340 flow [2023-11-26 11:54:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:54:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:54:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2023-11-26 11:54:49,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2023-11-26 11:54:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 57 transitions. [2023-11-26 11:54:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 57 transitions. [2023-11-26 11:54:49,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:49,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 57 transitions. [2023-11-26 11:54:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:49,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:49,282 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:49,282 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 226 flow. Second operand 6 states and 57 transitions. [2023-11-26 11:54:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 340 flow [2023-11-26 11:54:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:49,289 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 288 flow [2023-11-26 11:54:49,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-26 11:54:49,295 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-11-26 11:54:49,295 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 288 flow [2023-11-26 11:54:49,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:49,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:49,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:49,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:54:49,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:54:49,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:49,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash 843202233, now seen corresponding path program 2 times [2023-11-26 11:54:49,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:49,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953304987] [2023-11-26 11:54:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:49,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:49,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953304987] [2023-11-26 11:54:49,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953304987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:49,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355232099] [2023-11-26 11:54:49,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:54:49,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:49,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:49,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:54:49,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:54:49,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:49,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:54:49,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:50,509 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:54:50,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 59 [2023-11-26 11:54:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 11:54:50,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:50,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355232099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:50,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:50,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 15 [2023-11-26 11:54:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061841777] [2023-11-26 11:54:50,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:50,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:54:50,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:54:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:54:50,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:50,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 288 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:50,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:50,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:50,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:51,568 INFO L124 PetriNetUnfolderBase]: 703/1215 cut-off events. [2023-11-26 11:54:51,569 INFO L125 PetriNetUnfolderBase]: For 1488/1488 co-relation queries the response was YES. [2023-11-26 11:54:51,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1215 events. 703/1215 cut-off events. For 1488/1488 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5908 event pairs, 116 based on Foata normal form. 7/1221 useless extension candidates. Maximal degree in co-relation 3475. Up to 433 conditions per place. [2023-11-26 11:54:51,581 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 91 selfloop transitions, 12 changer transitions 19/123 dead transitions. [2023-11-26 11:54:51,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 123 transitions, 832 flow [2023-11-26 11:54:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:54:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:54:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2023-11-26 11:54:51,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2023-11-26 11:54:51,584 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 127 transitions. [2023-11-26 11:54:51,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 127 transitions. [2023-11-26 11:54:51,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:51,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 127 transitions. [2023-11-26 11:54:51,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:51,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:51,587 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:51,587 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 288 flow. Second operand 11 states and 127 transitions. [2023-11-26 11:54:51,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 123 transitions, 832 flow [2023-11-26 11:54:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 123 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:51,594 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 331 flow [2023-11-26 11:54:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-11-26 11:54:51,595 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2023-11-26 11:54:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 331 flow [2023-11-26 11:54:51,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:51,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:51,596 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:51,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:54:51,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:51,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -454550861, now seen corresponding path program 3 times [2023-11-26 11:54:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520078295] [2023-11-26 11:54:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520078295] [2023-11-26 11:54:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520078295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582190760] [2023-11-26 11:54:51,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:54:51,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:51,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:51,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:51,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:54:52,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 11:54:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:52,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:54:52,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:52,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:54:52,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2023-11-26 11:54:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 11:54:52,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582190760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 15 [2023-11-26 11:54:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074498510] [2023-11-26 11:54:52,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:54:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:54:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:54:52,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 331 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:53,761 INFO L124 PetriNetUnfolderBase]: 835/1459 cut-off events. [2023-11-26 11:54:53,761 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-11-26 11:54:53,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4776 conditions, 1459 events. 835/1459 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7540 event pairs, 140 based on Foata normal form. 5/1463 useless extension candidates. Maximal degree in co-relation 4706. Up to 447 conditions per place. [2023-11-26 11:54:53,778 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 134 selfloop transitions, 28 changer transitions 7/170 dead transitions. [2023-11-26 11:54:53,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 170 transitions, 1170 flow [2023-11-26 11:54:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:54:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:54:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2023-11-26 11:54:53,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-26 11:54:53,781 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 192 transitions. [2023-11-26 11:54:53,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 192 transitions. [2023-11-26 11:54:53,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:53,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 192 transitions. [2023-11-26 11:54:53,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.0) internal successors, (192), 16 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:53,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:53,784 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:53,784 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 331 flow. Second operand 16 states and 192 transitions. [2023-11-26 11:54:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 170 transitions, 1170 flow [2023-11-26 11:54:53,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 170 transitions, 1097 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-11-26 11:54:53,797 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 533 flow [2023-11-26 11:54:53,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=533, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-11-26 11:54:53,798 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2023-11-26 11:54:53,798 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 533 flow [2023-11-26 11:54:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:53,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:53,799 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:53,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:54:54,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:54,005 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:54,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1395740077, now seen corresponding path program 4 times [2023-11-26 11:54:54,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926955164] [2023-11-26 11:54:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926955164] [2023-11-26 11:54:54,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926955164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:54,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490580606] [2023-11-26 11:54:54,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:54:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:54,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:54,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:54:54,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:54:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:54,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:54:54,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:54,637 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-26 11:54:54,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 64 [2023-11-26 11:54:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 11:54:54,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:54,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490580606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:54,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:54,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-26 11:54:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687812324] [2023-11-26 11:54:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:54:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:54:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:54:54,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:54,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:54,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:54,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:54,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:55,514 INFO L124 PetriNetUnfolderBase]: 837/1467 cut-off events. [2023-11-26 11:54:55,514 INFO L125 PetriNetUnfolderBase]: For 3651/3651 co-relation queries the response was YES. [2023-11-26 11:54:55,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1467 events. 837/1467 cut-off events. For 3651/3651 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7602 event pairs, 188 based on Foata normal form. 7/1473 useless extension candidates. Maximal degree in co-relation 5235. Up to 460 conditions per place. [2023-11-26 11:54:55,534 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 105 selfloop transitions, 22 changer transitions 14/142 dead transitions. [2023-11-26 11:54:55,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1143 flow [2023-11-26 11:54:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:54:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:54:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2023-11-26 11:54:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2023-11-26 11:54:55,537 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 139 transitions. [2023-11-26 11:54:55,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 139 transitions. [2023-11-26 11:54:55,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:55,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 139 transitions. [2023-11-26 11:54:55,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:55,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:55,539 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:55,540 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 533 flow. Second operand 10 states and 139 transitions. [2023-11-26 11:54:55,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1143 flow [2023-11-26 11:54:55,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 142 transitions, 1076 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-26 11:54:55,566 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 555 flow [2023-11-26 11:54:55,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=555, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2023-11-26 11:54:55,567 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2023-11-26 11:54:55,567 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 555 flow [2023-11-26 11:54:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:55,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:55,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:55,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:55,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:55,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1045327689, now seen corresponding path program 5 times [2023-11-26 11:54:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:55,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793488055] [2023-11-26 11:54:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:55,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:55,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793488055] [2023-11-26 11:54:55,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793488055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:55,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172013731] [2023-11-26 11:54:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:54:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:55,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:54:56,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:54:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:56,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:54:56,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:56,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172013731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:56,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:56,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 11:54:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755258791] [2023-11-26 11:54:56,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:56,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:54:56,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:54:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:54:56,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:56,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 555 flow. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:56,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:56,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:56,594 INFO L124 PetriNetUnfolderBase]: 819/1432 cut-off events. [2023-11-26 11:54:56,594 INFO L125 PetriNetUnfolderBase]: For 4334/4334 co-relation queries the response was YES. [2023-11-26 11:54:56,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 1432 events. 819/1432 cut-off events. For 4334/4334 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7088 event pairs, 561 based on Foata normal form. 1/1432 useless extension candidates. Maximal degree in co-relation 5173. Up to 1409 conditions per place. [2023-11-26 11:54:56,614 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2023-11-26 11:54:56,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 705 flow [2023-11-26 11:54:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:54:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:54:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 58 transitions. [2023-11-26 11:54:56,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2023-11-26 11:54:56,617 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 58 transitions. [2023-11-26 11:54:56,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 58 transitions. [2023-11-26 11:54:56,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:56,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 58 transitions. [2023-11-26 11:54:56,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:56,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:56,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:56,619 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 555 flow. Second operand 7 states and 58 transitions. [2023-11-26 11:54:56,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 705 flow [2023-11-26 11:54:56,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 664 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-26 11:54:56,633 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 560 flow [2023-11-26 11:54:56,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-26 11:54:56,634 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2023-11-26 11:54:56,634 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 560 flow [2023-11-26 11:54:56,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:56,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:56,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:56,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:56,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16e0df89-84d2-4329-927c-bc796331e1d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:54:56,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:54:56,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1524200804, now seen corresponding path program 6 times [2023-11-26 11:54:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489336822] [2023-11-26 11:54:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:56,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:54:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:58,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489336822] [2023-11-26 11:54:58,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489336822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:58,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:58,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:54:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814245241] [2023-11-26 11:54:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:54:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:54:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:54:58,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:54:58,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 560 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:58,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:58,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:54:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:00,019 INFO L124 PetriNetUnfolderBase]: 1206/2112 cut-off events. [2023-11-26 11:55:00,019 INFO L125 PetriNetUnfolderBase]: For 5235/5235 co-relation queries the response was YES. [2023-11-26 11:55:00,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7355 conditions, 2112 events. 1206/2112 cut-off events. For 5235/5235 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11672 event pairs, 107 based on Foata normal form. 8/2120 useless extension candidates. Maximal degree in co-relation 7260. Up to 318 conditions per place. [2023-11-26 11:55:00,058 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 178 selfloop transitions, 90 changer transitions 22/291 dead transitions. [2023-11-26 11:55:00,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 291 transitions, 2155 flow [2023-11-26 11:55:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:55:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-26 11:55:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 347 transitions. [2023-11-26 11:55:00,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739224137931034 [2023-11-26 11:55:00,063 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 347 transitions. [2023-11-26 11:55:00,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 347 transitions. [2023-11-26 11:55:00,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:00,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 347 transitions. [2023-11-26 11:55:00,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 10.84375) internal successors, (347), 32 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:00,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:00,070 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:00,070 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 560 flow. Second operand 32 states and 347 transitions. [2023-11-26 11:55:00,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 291 transitions, 2155 flow [2023-11-26 11:55:00,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 291 transitions, 2131 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:00,096 INFO L231 Difference]: Finished difference. Result has 120 places, 134 transitions, 1331 flow [2023-11-26 11:55:00,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1331, PETRI_PLACES=120, PETRI_TRANSITIONS=134} [2023-11-26 11:55:00,097 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 93 predicate places. [2023-11-26 11:55:00,098 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 1331 flow [2023-11-26 11:55:00,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:00,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:00,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:00,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:55:00,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:00,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:00,099 INFO L85 PathProgramCache]: Analyzing trace with hash -746116228, now seen corresponding path program 7 times [2023-11-26 11:55:00,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:00,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677176754] [2023-11-26 11:55:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:00,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677176754] [2023-11-26 11:55:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677176754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112517407] [2023-11-26 11:55:01,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:01,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:01,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 1331 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:01,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:01,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:01,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:02,989 INFO L124 PetriNetUnfolderBase]: 1510/2669 cut-off events. [2023-11-26 11:55:02,989 INFO L125 PetriNetUnfolderBase]: For 9233/9233 co-relation queries the response was YES. [2023-11-26 11:55:03,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10417 conditions, 2669 events. 1510/2669 cut-off events. For 9233/9233 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15757 event pairs, 117 based on Foata normal form. 1/2670 useless extension candidates. Maximal degree in co-relation 10324. Up to 488 conditions per place. [2023-11-26 11:55:03,020 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 149 selfloop transitions, 127 changer transitions 10/287 dead transitions. [2023-11-26 11:55:03,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 287 transitions, 2786 flow [2023-11-26 11:55:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:55:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-26 11:55:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 260 transitions. [2023-11-26 11:55:03,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38980509745127434 [2023-11-26 11:55:03,023 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 260 transitions. [2023-11-26 11:55:03,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 260 transitions. [2023-11-26 11:55:03,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:03,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 260 transitions. [2023-11-26 11:55:03,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.304347826086957) internal successors, (260), 23 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:03,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:03,032 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:03,032 INFO L175 Difference]: Start difference. First operand has 120 places, 134 transitions, 1331 flow. Second operand 23 states and 260 transitions. [2023-11-26 11:55:03,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 287 transitions, 2786 flow [2023-11-26 11:55:03,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 287 transitions, 2365 flow, removed 161 selfloop flow, removed 15 redundant places. [2023-11-26 11:55:03,110 INFO L231 Difference]: Finished difference. Result has 131 places, 186 transitions, 1834 flow [2023-11-26 11:55:03,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1834, PETRI_PLACES=131, PETRI_TRANSITIONS=186} [2023-11-26 11:55:03,111 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 104 predicate places. [2023-11-26 11:55:03,111 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 186 transitions, 1834 flow [2023-11-26 11:55:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:03,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:03,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:03,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:55:03,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:03,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -255927218, now seen corresponding path program 8 times [2023-11-26 11:55:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918107158] [2023-11-26 11:55:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:04,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918107158] [2023-11-26 11:55:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918107158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:04,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:04,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:04,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324733533] [2023-11-26 11:55:04,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:04,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:04,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:04,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 186 transitions, 1834 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:04,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:04,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:04,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:06,037 INFO L124 PetriNetUnfolderBase]: 1504/2663 cut-off events. [2023-11-26 11:55:06,037 INFO L125 PetriNetUnfolderBase]: For 8495/8495 co-relation queries the response was YES. [2023-11-26 11:55:06,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10382 conditions, 2663 events. 1504/2663 cut-off events. For 8495/8495 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15747 event pairs, 123 based on Foata normal form. 1/2664 useless extension candidates. Maximal degree in co-relation 10289. Up to 551 conditions per place. [2023-11-26 11:55:06,073 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 170 selfloop transitions, 133 changer transitions 10/314 dead transitions. [2023-11-26 11:55:06,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 314 transitions, 3015 flow [2023-11-26 11:55:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:55:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:55:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 279 transitions. [2023-11-26 11:55:06,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2023-11-26 11:55:06,077 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 279 transitions. [2023-11-26 11:55:06,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 279 transitions. [2023-11-26 11:55:06,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:06,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 279 transitions. [2023-11-26 11:55:06,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 11.625) internal successors, (279), 24 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:06,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:06,080 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:06,081 INFO L175 Difference]: Start difference. First operand has 131 places, 186 transitions, 1834 flow. Second operand 24 states and 279 transitions. [2023-11-26 11:55:06,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 314 transitions, 3015 flow [2023-11-26 11:55:06,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 314 transitions, 2897 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:06,155 INFO L231 Difference]: Finished difference. Result has 154 places, 201 transitions, 2235 flow [2023-11-26 11:55:06,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2235, PETRI_PLACES=154, PETRI_TRANSITIONS=201} [2023-11-26 11:55:06,157 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 127 predicate places. [2023-11-26 11:55:06,157 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 201 transitions, 2235 flow [2023-11-26 11:55:06,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:06,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:55:06,158 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:06,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 331818104, now seen corresponding path program 9 times [2023-11-26 11:55:06,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:06,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190117078] [2023-11-26 11:55:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:07,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190117078] [2023-11-26 11:55:07,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190117078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:07,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:07,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630723066] [2023-11-26 11:55:07,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:07,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:07,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 201 transitions, 2235 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:07,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:07,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:07,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:08,677 INFO L124 PetriNetUnfolderBase]: 1588/2822 cut-off events. [2023-11-26 11:55:08,677 INFO L125 PetriNetUnfolderBase]: For 11036/11036 co-relation queries the response was YES. [2023-11-26 11:55:08,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11853 conditions, 2822 events. 1588/2822 cut-off events. For 11036/11036 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17038 event pairs, 245 based on Foata normal form. 1/2823 useless extension candidates. Maximal degree in co-relation 11756. Up to 814 conditions per place. [2023-11-26 11:55:08,718 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 172 selfloop transitions, 117 changer transitions 11/301 dead transitions. [2023-11-26 11:55:08,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 301 transitions, 3265 flow [2023-11-26 11:55:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 11:55:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-26 11:55:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 235 transitions. [2023-11-26 11:55:08,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2023-11-26 11:55:08,722 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 235 transitions. [2023-11-26 11:55:08,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 235 transitions. [2023-11-26 11:55:08,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:08,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 235 transitions. [2023-11-26 11:55:08,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.75) internal successors, (235), 20 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,726 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,727 INFO L175 Difference]: Start difference. First operand has 154 places, 201 transitions, 2235 flow. Second operand 20 states and 235 transitions. [2023-11-26 11:55:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 301 transitions, 3265 flow [2023-11-26 11:55:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 301 transitions, 3142 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-11-26 11:55:08,798 INFO L231 Difference]: Finished difference. Result has 166 places, 209 transitions, 2571 flow [2023-11-26 11:55:08,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2571, PETRI_PLACES=166, PETRI_TRANSITIONS=209} [2023-11-26 11:55:08,799 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 139 predicate places. [2023-11-26 11:55:08,799 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 209 transitions, 2571 flow [2023-11-26 11:55:08,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:08,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:55:08,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:08,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1105423182, now seen corresponding path program 10 times [2023-11-26 11:55:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419023813] [2023-11-26 11:55:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419023813] [2023-11-26 11:55:09,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419023813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:09,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:09,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135426426] [2023-11-26 11:55:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:09,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:09,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:09,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 209 transitions, 2571 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:09,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:09,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:09,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:11,580 INFO L124 PetriNetUnfolderBase]: 1779/3169 cut-off events. [2023-11-26 11:55:11,580 INFO L125 PetriNetUnfolderBase]: For 14772/14772 co-relation queries the response was YES. [2023-11-26 11:55:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14120 conditions, 3169 events. 1779/3169 cut-off events. For 14772/14772 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19814 event pairs, 214 based on Foata normal form. 1/3170 useless extension candidates. Maximal degree in co-relation 14020. Up to 600 conditions per place. [2023-11-26 11:55:11,622 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 203 selfloop transitions, 118 changer transitions 11/333 dead transitions. [2023-11-26 11:55:11,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 333 transitions, 3837 flow [2023-11-26 11:55:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:55:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 11:55:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 262 transitions. [2023-11-26 11:55:11,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106583072100313 [2023-11-26 11:55:11,625 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 262 transitions. [2023-11-26 11:55:11,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 262 transitions. [2023-11-26 11:55:11,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:11,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 262 transitions. [2023-11-26 11:55:11,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.909090909090908) internal successors, (262), 22 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:11,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:11,629 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:11,629 INFO L175 Difference]: Start difference. First operand has 166 places, 209 transitions, 2571 flow. Second operand 22 states and 262 transitions. [2023-11-26 11:55:11,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 333 transitions, 3837 flow [2023-11-26 11:55:11,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 333 transitions, 3708 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-11-26 11:55:11,735 INFO L231 Difference]: Finished difference. Result has 180 places, 225 transitions, 3028 flow [2023-11-26 11:55:11,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3028, PETRI_PLACES=180, PETRI_TRANSITIONS=225} [2023-11-26 11:55:11,736 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 153 predicate places. [2023-11-26 11:55:11,736 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 225 transitions, 3028 flow [2023-11-26 11:55:11,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:11,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:11,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:11,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:55:11,737 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:11,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1594363720, now seen corresponding path program 11 times [2023-11-26 11:55:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:11,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446143456] [2023-11-26 11:55:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:12,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446143456] [2023-11-26 11:55:12,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446143456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:12,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775274447] [2023-11-26 11:55:12,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:12,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:12,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:12,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:12,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:12,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 225 transitions, 3028 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:12,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:14,540 INFO L124 PetriNetUnfolderBase]: 2002/3579 cut-off events. [2023-11-26 11:55:14,540 INFO L125 PetriNetUnfolderBase]: For 19614/19614 co-relation queries the response was YES. [2023-11-26 11:55:14,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 3579 events. 2002/3579 cut-off events. For 19614/19614 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22939 event pairs, 298 based on Foata normal form. 4/3583 useless extension candidates. Maximal degree in co-relation 16691. Up to 820 conditions per place. [2023-11-26 11:55:14,610 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 211 selfloop transitions, 145 changer transitions 12/369 dead transitions. [2023-11-26 11:55:14,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 369 transitions, 4521 flow [2023-11-26 11:55:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:55:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:55:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 286 transitions. [2023-11-26 11:55:14,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109195402298851 [2023-11-26 11:55:14,613 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 286 transitions. [2023-11-26 11:55:14,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 286 transitions. [2023-11-26 11:55:14,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:14,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 286 transitions. [2023-11-26 11:55:14,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 11.916666666666666) internal successors, (286), 24 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,617 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,618 INFO L175 Difference]: Start difference. First operand has 180 places, 225 transitions, 3028 flow. Second operand 24 states and 286 transitions. [2023-11-26 11:55:14,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 369 transitions, 4521 flow [2023-11-26 11:55:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 369 transitions, 4454 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-26 11:55:14,767 INFO L231 Difference]: Finished difference. Result has 201 places, 244 transitions, 3634 flow [2023-11-26 11:55:14,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3634, PETRI_PLACES=201, PETRI_TRANSITIONS=244} [2023-11-26 11:55:14,768 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 174 predicate places. [2023-11-26 11:55:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 244 transitions, 3634 flow [2023-11-26 11:55:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:14,769 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:55:14,770 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:14,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1130858108, now seen corresponding path program 12 times [2023-11-26 11:55:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803899911] [2023-11-26 11:55:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:15,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:15,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803899911] [2023-11-26 11:55:15,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803899911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:15,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:15,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831756001] [2023-11-26 11:55:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:15,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:15,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:15,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:15,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 244 transitions, 3634 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:15,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:15,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:17,066 INFO L124 PetriNetUnfolderBase]: 1990/3552 cut-off events. [2023-11-26 11:55:17,066 INFO L125 PetriNetUnfolderBase]: For 25017/25017 co-relation queries the response was YES. [2023-11-26 11:55:17,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18022 conditions, 3552 events. 1990/3552 cut-off events. For 25017/25017 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22717 event pairs, 499 based on Foata normal form. 1/3553 useless extension candidates. Maximal degree in co-relation 17911. Up to 1327 conditions per place. [2023-11-26 11:55:17,130 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 199 selfloop transitions, 99 changer transitions 10/309 dead transitions. [2023-11-26 11:55:17,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 309 transitions, 4476 flow [2023-11-26 11:55:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:55:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 11:55:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 183 transitions. [2023-11-26 11:55:17,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711967545638945 [2023-11-26 11:55:17,132 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 183 transitions. [2023-11-26 11:55:17,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 183 transitions. [2023-11-26 11:55:17,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:17,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 183 transitions. [2023-11-26 11:55:17,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 10.764705882352942) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,135 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,135 INFO L175 Difference]: Start difference. First operand has 201 places, 244 transitions, 3634 flow. Second operand 17 states and 183 transitions. [2023-11-26 11:55:17,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 309 transitions, 4476 flow [2023-11-26 11:55:17,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 309 transitions, 4209 flow, removed 11 selfloop flow, removed 17 redundant places. [2023-11-26 11:55:17,285 INFO L231 Difference]: Finished difference. Result has 200 places, 243 transitions, 3563 flow [2023-11-26 11:55:17,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3563, PETRI_PLACES=200, PETRI_TRANSITIONS=243} [2023-11-26 11:55:17,286 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2023-11-26 11:55:17,287 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 243 transitions, 3563 flow [2023-11-26 11:55:17,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:17,287 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:55:17,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:17,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1013936712, now seen corresponding path program 13 times [2023-11-26 11:55:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:17,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832176484] [2023-11-26 11:55:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:18,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832176484] [2023-11-26 11:55:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832176484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:18,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437557270] [2023-11-26 11:55:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:18,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:18,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 243 transitions, 3563 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:18,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:18,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:20,037 INFO L124 PetriNetUnfolderBase]: 2154/3857 cut-off events. [2023-11-26 11:55:20,037 INFO L125 PetriNetUnfolderBase]: For 26479/26479 co-relation queries the response was YES. [2023-11-26 11:55:20,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 3857 events. 2154/3857 cut-off events. For 26479/26479 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25152 event pairs, 145 based on Foata normal form. 1/3858 useless extension candidates. Maximal degree in co-relation 18923. Up to 714 conditions per place. [2023-11-26 11:55:20,089 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 189 selfloop transitions, 217 changer transitions 8/415 dead transitions. [2023-11-26 11:55:20,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 415 transitions, 5624 flow [2023-11-26 11:55:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:55:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:55:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 284 transitions. [2023-11-26 11:55:20,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40804597701149425 [2023-11-26 11:55:20,092 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 284 transitions. [2023-11-26 11:55:20,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 284 transitions. [2023-11-26 11:55:20,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:20,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 284 transitions. [2023-11-26 11:55:20,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 11.833333333333334) internal successors, (284), 24 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:20,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:20,096 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:20,096 INFO L175 Difference]: Start difference. First operand has 200 places, 243 transitions, 3563 flow. Second operand 24 states and 284 transitions. [2023-11-26 11:55:20,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 415 transitions, 5624 flow [2023-11-26 11:55:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 415 transitions, 5326 flow, removed 9 selfloop flow, removed 17 redundant places. [2023-11-26 11:55:20,243 INFO L231 Difference]: Finished difference. Result has 216 places, 292 transitions, 4668 flow [2023-11-26 11:55:20,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4668, PETRI_PLACES=216, PETRI_TRANSITIONS=292} [2023-11-26 11:55:20,245 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 189 predicate places. [2023-11-26 11:55:20,245 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 292 transitions, 4668 flow [2023-11-26 11:55:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:20,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:20,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:55:20,246 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:20,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash -940550636, now seen corresponding path program 14 times [2023-11-26 11:55:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:20,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310644721] [2023-11-26 11:55:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:20,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:21,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310644721] [2023-11-26 11:55:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310644721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:21,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:21,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828451643] [2023-11-26 11:55:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:21,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:21,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 292 transitions, 4668 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:21,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:22,531 INFO L124 PetriNetUnfolderBase]: 2217/3989 cut-off events. [2023-11-26 11:55:22,531 INFO L125 PetriNetUnfolderBase]: For 32807/32807 co-relation queries the response was YES. [2023-11-26 11:55:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20798 conditions, 3989 events. 2217/3989 cut-off events. For 32807/32807 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26252 event pairs, 486 based on Foata normal form. 1/3990 useless extension candidates. Maximal degree in co-relation 20680. Up to 1134 conditions per place. [2023-11-26 11:55:22,582 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 215 selfloop transitions, 153 changer transitions 8/377 dead transitions. [2023-11-26 11:55:22,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 377 transitions, 5860 flow [2023-11-26 11:55:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:55:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 11:55:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 189 transitions. [2023-11-26 11:55:22,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38336713995943206 [2023-11-26 11:55:22,584 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 189 transitions. [2023-11-26 11:55:22,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 189 transitions. [2023-11-26 11:55:22,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:22,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 189 transitions. [2023-11-26 11:55:22,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.117647058823529) internal successors, (189), 17 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,587 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,587 INFO L175 Difference]: Start difference. First operand has 216 places, 292 transitions, 4668 flow. Second operand 17 states and 189 transitions. [2023-11-26 11:55:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 377 transitions, 5860 flow [2023-11-26 11:55:22,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 377 transitions, 5751 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:22,801 INFO L231 Difference]: Finished difference. Result has 235 places, 303 transitions, 5149 flow [2023-11-26 11:55:22,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5149, PETRI_PLACES=235, PETRI_TRANSITIONS=303} [2023-11-26 11:55:22,802 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 208 predicate places. [2023-11-26 11:55:22,802 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 303 transitions, 5149 flow [2023-11-26 11:55:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:22,803 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:55:22,803 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:22,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1785277034, now seen corresponding path program 15 times [2023-11-26 11:55:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453019157] [2023-11-26 11:55:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:23,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:23,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453019157] [2023-11-26 11:55:23,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453019157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:23,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:23,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:55:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979950364] [2023-11-26 11:55:23,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:55:23,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:55:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:55:23,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-26 11:55:23,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 303 transitions, 5149 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:23,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-26 11:55:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand