./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label31.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_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI --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 781b4c30281e668acaf3c14c6cf74c491996fd51fc229d130e4fc767358d6ab3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:01:30,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:30,486 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:01:30,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:30,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:30,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:30,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:30,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:30,519 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:30,525 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:30,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:30,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:30,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:30,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:30,529 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:30,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:30,530 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:01:30,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:30,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:30,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:30,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:30,532 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:01:30,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:30,533 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:01:30,533 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:30,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:01:30,534 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:30,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:30,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:30,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:30,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:30,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:30,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:30,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:30,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:01:30,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:01:30,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:01:30,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:30,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:30,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:01:30,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:30,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:30,542 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_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781b4c30281e668acaf3c14c6cf74c491996fd51fc229d130e4fc767358d6ab3 [2023-11-24 22:01:30,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:30,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:30,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:30,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:30,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:30,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2023-11-24 22:01:34,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:34,656 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:34,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2023-11-24 22:01:34,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/data/9b026203a/e5c75645b0ec40afa7be725ff3c38900/FLAG8c62c17bf [2023-11-24 22:01:34,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/data/9b026203a/e5c75645b0ec40afa7be725ff3c38900 [2023-11-24 22:01:34,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:34,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:34,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:34,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:34,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:34,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:34" (1/1) ... [2023-11-24 22:01:34,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10670851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:34, skipping insertion in model container [2023-11-24 22:01:34,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:34" (1/1) ... [2023-11-24 22:01:34,971 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:35,319 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_b6b24e74-501e-460c-b9df-d1b5e229b0c1/sv-benchmarks/c/eca-rers2012/Problem13_label31.c[5792,5805] [2023-11-24 22:01:36,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:36,635 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:01:36,660 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_b6b24e74-501e-460c-b9df-d1b5e229b0c1/sv-benchmarks/c/eca-rers2012/Problem13_label31.c[5792,5805] [2023-11-24 22:01:37,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:37,385 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:01:37,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37 WrapperNode [2023-11-24 22:01:37,386 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:37,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:37,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:01:37,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:01:37,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:37,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,125 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-24 22:01:38,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:38,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:01:38,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:01:38,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:01:38,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,270 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,476 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 22:01:38,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:38,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:38,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:38,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:38,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (1/1) ... [2023-11-24 22:01:38,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:38,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:39,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6b24e74-501e-460c-b9df-d1b5e229b0c1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:01:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:39,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:39,142 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:39,145 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:46,661 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:46,762 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:46,764 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:01:46,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:46 BoogieIcfgContainer [2023-11-24 22:01:46,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:46,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:46,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:46,774 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:46,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:34" (1/3) ... [2023-11-24 22:01:46,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9e368e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:46, skipping insertion in model container [2023-11-24 22:01:46,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:37" (2/3) ... [2023-11-24 22:01:46,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9e368e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:46, skipping insertion in model container [2023-11-24 22:01:46,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:46" (3/3) ... [2023-11-24 22:01:46,780 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label31.c [2023-11-24 22:01:46,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:46,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:01:46,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:46,928 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;@2bc6641d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:46,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:01:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 22:01:46,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:46,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:46,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:46,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash 220651675, now seen corresponding path program 1 times [2023-11-24 22:01:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019640149] [2023-11-24 22:01:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:46,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:47,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019640149] [2023-11-24 22:01:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019640149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:47,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:47,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140091559] [2023-11-24 22:01:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:47,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:01:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:01:47,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:01:47,276 INFO L87 Difference]: Start difference. First operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:47,428 INFO L93 Difference]: Finished difference Result 2071 states and 3881 transitions. [2023-11-24 22:01:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:01:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-24 22:01:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:47,463 INFO L225 Difference]: With dead ends: 2071 [2023-11-24 22:01:47,463 INFO L226 Difference]: Without dead ends: 1034 [2023-11-24 22:01:47,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:01:47,482 INFO L413 NwaCegarLoop]: 1876 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:47,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1876 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:01:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-11-24 22:01:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-11-24 22:01:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.8160696999031947) internal successors, (1876), 1033 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1876 transitions. [2023-11-24 22:01:47,648 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1876 transitions. Word has length 39 [2023-11-24 22:01:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:47,648 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1876 transitions. [2023-11-24 22:01:47,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1876 transitions. [2023-11-24 22:01:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 22:01:47,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:47,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:01:47,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1569708347, now seen corresponding path program 1 times [2023-11-24 22:01:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294767271] [2023-11-24 22:01:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294767271] [2023-11-24 22:01:47,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294767271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:47,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:47,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:47,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781384090] [2023-11-24 22:01:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:47,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:47,847 INFO L87 Difference]: Start difference. First operand 1034 states and 1876 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:54,387 INFO L93 Difference]: Finished difference Result 2905 states and 5325 transitions. [2023-11-24 22:01:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-24 22:01:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:54,408 INFO L225 Difference]: With dead ends: 2905 [2023-11-24 22:01:54,408 INFO L226 Difference]: Without dead ends: 1872 [2023-11-24 22:01:54,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:54,413 INFO L413 NwaCegarLoop]: 939 mSDtfsCounter, 849 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:54,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1090 Invalid, 3244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [798 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-24 22:01:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2023-11-24 22:01:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1858. [2023-11-24 22:01:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 1.5444264943457189) internal successors, (2868), 1857 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2868 transitions. [2023-11-24 22:01:54,506 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 2868 transitions. Word has length 39 [2023-11-24 22:01:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:54,506 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 2868 transitions. [2023-11-24 22:01:54,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:01:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 2868 transitions. [2023-11-24 22:01:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-24 22:01:54,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:54,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:01:54,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:54,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -227118906, now seen corresponding path program 1 times [2023-11-24 22:01:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855029675] [2023-11-24 22:01:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855029675] [2023-11-24 22:01:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855029675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:55,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:55,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249389953] [2023-11-24 22:01:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:55,022 INFO L87 Difference]: Start difference. First operand 1858 states and 2868 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:00,965 INFO L93 Difference]: Finished difference Result 5316 states and 8228 transitions. [2023-11-24 22:02:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-24 22:02:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:00,990 INFO L225 Difference]: With dead ends: 5316 [2023-11-24 22:02:00,990 INFO L226 Difference]: Without dead ends: 3459 [2023-11-24 22:02:00,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:00,995 INFO L413 NwaCegarLoop]: 1037 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:00,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1190 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-24 22:02:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2023-11-24 22:02:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3458. [2023-11-24 22:02:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 1.380676887474689) internal successors, (4773), 3457 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4773 transitions. [2023-11-24 22:02:01,099 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4773 transitions. Word has length 111 [2023-11-24 22:02:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:01,100 INFO L495 AbstractCegarLoop]: Abstraction has 3458 states and 4773 transitions. [2023-11-24 22:02:01,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4773 transitions. [2023-11-24 22:02:01,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-24 22:02:01,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:01,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:01,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:02:01,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:01,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash -535500547, now seen corresponding path program 1 times [2023-11-24 22:02:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197306333] [2023-11-24 22:02:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:01,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:01,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197306333] [2023-11-24 22:02:01,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197306333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:01,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:01,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849731160] [2023-11-24 22:02:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:01,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:02:01,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:01,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:02:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:02:01,674 INFO L87 Difference]: Start difference. First operand 3458 states and 4773 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:09,520 INFO L93 Difference]: Finished difference Result 10869 states and 14767 transitions. [2023-11-24 22:02:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:02:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-11-24 22:02:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:09,567 INFO L225 Difference]: With dead ends: 10869 [2023-11-24 22:02:09,567 INFO L226 Difference]: Without dead ends: 7412 [2023-11-24 22:02:09,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:02:09,576 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 2583 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:09,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2583 Valid, 999 Invalid, 4949 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [831 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-11-24 22:02:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2023-11-24 22:02:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7411. [2023-11-24 22:02:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 1.2701754385964912) internal successors, (9412), 7410 states have internal predecessors, (9412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 9412 transitions. [2023-11-24 22:02:09,769 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 9412 transitions. Word has length 125 [2023-11-24 22:02:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:09,770 INFO L495 AbstractCegarLoop]: Abstraction has 7411 states and 9412 transitions. [2023-11-24 22:02:09,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 9412 transitions. [2023-11-24 22:02:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-24 22:02:09,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:09,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:02:09,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:09,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2085238340, now seen corresponding path program 1 times [2023-11-24 22:02:09,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:09,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403310736] [2023-11-24 22:02:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:09,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403310736] [2023-11-24 22:02:09,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403310736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:09,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:09,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114346792] [2023-11-24 22:02:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:09,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:09,933 INFO L87 Difference]: Start difference. First operand 7411 states and 9412 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:02:15,251 INFO L93 Difference]: Finished difference Result 17194 states and 22712 transitions. [2023-11-24 22:02:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-11-24 22:02:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:02:15,314 INFO L225 Difference]: With dead ends: 17194 [2023-11-24 22:02:15,315 INFO L226 Difference]: Without dead ends: 10571 [2023-11-24 22:02:15,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:15,326 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 927 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:02:15,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 902 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-24 22:02:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10571 states. [2023-11-24 22:02:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10571 to 10563. [2023-11-24 22:02:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10563 states, 10562 states have (on average 1.2539291800795305) internal successors, (13244), 10562 states have internal predecessors, (13244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10563 states to 10563 states and 13244 transitions. [2023-11-24 22:02:15,607 INFO L78 Accepts]: Start accepts. Automaton has 10563 states and 13244 transitions. Word has length 135 [2023-11-24 22:02:15,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:02:15,609 INFO L495 AbstractCegarLoop]: Abstraction has 10563 states and 13244 transitions. [2023-11-24 22:02:15,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10563 states and 13244 transitions. [2023-11-24 22:02:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-24 22:02:15,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:15,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:15,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:02:15,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:15,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash 708231444, now seen corresponding path program 1 times [2023-11-24 22:02:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:15,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267433458] [2023-11-24 22:02:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:15,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-24 22:02:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267433458] [2023-11-24 22:02:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267433458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:15,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:15,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371733389] [2023-11-24 22:02:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:15,900 INFO L87 Difference]: Start difference. First operand 10563 states and 13244 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)