./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label10.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_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/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_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/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_2457e6cb-551d-449b-b7e1-dda739aacb4a/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 af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:43,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:43,510 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:43:43,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:43,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:43,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:43,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:43,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:43,567 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:43,572 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:43,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:43,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:43,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:43,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:43,577 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:43,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:43,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:43:43,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:43,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:43,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:43,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:43,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:43:43,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:43,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:43:43,583 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:43,583 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:43:43,584 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:43,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:43,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:43,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:43,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:43,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:43,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:43:43,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:43,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:43,591 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_2457e6cb-551d-449b-b7e1-dda739aacb4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e [2023-11-26 11:43:43,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:43,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:43,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:43,954 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:43,955 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:43,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2023-11-26 11:43:47,124 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:47,613 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:47,613 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2023-11-26 11:43:47,645 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/data/4384a03cb/4abadb26109b4d8097c7d1aad92dc17e/FLAGaa45fd330 [2023-11-26 11:43:47,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/data/4384a03cb/4abadb26109b4d8097c7d1aad92dc17e [2023-11-26 11:43:47,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:47,678 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:47,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:47,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:47,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d3f79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47, skipping insertion in model container [2023-11-26 11:43:47,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:48,150 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_2457e6cb-551d-449b-b7e1-dda739aacb4a/sv-benchmarks/c/eca-rers2012/Problem12_label10.c[3658,3671] [2023-11-26 11:43:49,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:49,262 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:43:49,288 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_2457e6cb-551d-449b-b7e1-dda739aacb4a/sv-benchmarks/c/eca-rers2012/Problem12_label10.c[3658,3671] [2023-11-26 11:43:49,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:49,958 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:43:49,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49 WrapperNode [2023-11-26 11:43:49,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:49,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:49,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:43:49,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:43:49,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,429 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-26 11:43:50,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:50,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:43:50,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:43:50,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:43:50,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,487 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,760 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]. [2023-11-26 11:43:50,772 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:50,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,112 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,250 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:43:51,374 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:43:51,375 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:43:51,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:43:51,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (1/1) ... [2023-11-26 11:43:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:51,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:51,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:43:51,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2457e6cb-551d-449b-b7e1-dda739aacb4a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:43:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:43:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:43:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:43:51,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:43:51,586 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:43:51,589 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:43:57,196 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:43:57,278 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:43:57,280 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:43:57,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:57 BoogieIcfgContainer [2023-11-26 11:43:57,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:43:57,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:43:57,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:43:57,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:43:57,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:43:47" (1/3) ... [2023-11-26 11:43:57,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406b33d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:57, skipping insertion in model container [2023-11-26 11:43:57,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:49" (2/3) ... [2023-11-26 11:43:57,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406b33d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:57, skipping insertion in model container [2023-11-26 11:43:57,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:57" (3/3) ... [2023-11-26 11:43:57,295 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label10.c [2023-11-26 11:43:57,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:43:57,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:43:57,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:43:57,473 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;@6260b7dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:43:57,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:43:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 11:43:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:43:57,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:57,489 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] [2023-11-26 11:43:57,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1730962136, now seen corresponding path program 1 times [2023-11-26 11:43:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788187091] [2023-11-26 11:43:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:57,735 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 11:43:57,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788187091] [2023-11-26 11:43:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788187091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:57,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:57,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241473040] [2023-11-26 11:43:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:57,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:43:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:43:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:43:57,794 INFO L87 Difference]: Start difference. First operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:43:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:57,920 INFO L93 Difference]: Finished difference Result 1511 states and 3005 transitions. [2023-11-26 11:43:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:43:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2023-11-26 11:43:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:57,943 INFO L225 Difference]: With dead ends: 1511 [2023-11-26 11:43:57,944 INFO L226 Difference]: Without dead ends: 754 [2023-11-26 11:43:57,951 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 [2023-11-26 11:43:57,955 INFO L413 NwaCegarLoop]: 1438 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, 1438 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 [2023-11-26 11:43:57,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:43:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-26 11:43:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-26 11:43:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states 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 11:43:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions. [2023-11-26 11:43:58,056 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 26 [2023-11-26 11:43:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:58,057 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions. [2023-11-26 11:43:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:43:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions. [2023-11-26 11:43:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:43:58,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:58,059 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] [2023-11-26 11:43:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:43:58,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:43:58,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1651487998, now seen corresponding path program 1 times [2023-11-26 11:43:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:58,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223492032] [2023-11-26 11:43:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:58,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:58,259 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 11:43:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223492032] [2023-11-26 11:43:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223492032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:58,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:58,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328791670] [2023-11-26 11:43:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:58,271 INFO L87 Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:44:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:03,097 INFO L93 Difference]: Finished difference Result 2258 states and 4311 transitions. [2023-11-26 11:44:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2023-11-26 11:44:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:03,109 INFO L225 Difference]: With dead ends: 2258 [2023-11-26 11:44:03,109 INFO L226 Difference]: Without dead ends: 1505 [2023-11-26 11:44:03,111 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 [2023-11-26 11:44:03,112 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 842 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:03,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 113 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-26 11:44:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-26 11:44:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2023-11-26 11:44:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.846409574468085) internal successors, (2777), 1504 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 11:44:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2777 transitions. [2023-11-26 11:44:03,172 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2777 transitions. Word has length 26 [2023-11-26 11:44:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:03,172 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2777 transitions. [2023-11-26 11:44:03,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:44:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2777 transitions. [2023-11-26 11:44:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-26 11:44:03,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:03,177 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, 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] [2023-11-26 11:44:03,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:44:03,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:03,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -763058291, now seen corresponding path program 1 times [2023-11-26 11:44:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333690701] [2023-11-26 11:44:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:03,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333690701] [2023-11-26 11:44:03,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333690701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:03,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129448258] [2023-11-26 11:44:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:03,462 INFO L87 Difference]: Start difference. First operand 1505 states and 2777 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:08,119 INFO L93 Difference]: Finished difference Result 3760 states and 6892 transitions. [2023-11-26 11:44:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-26 11:44:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:08,135 INFO L225 Difference]: With dead ends: 3760 [2023-11-26 11:44:08,135 INFO L226 Difference]: Without dead ends: 2256 [2023-11-26 11:44:08,138 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 [2023-11-26 11:44:08,139 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:08,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 446 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-26 11:44:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-11-26 11:44:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2256. [2023-11-26 11:44:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 1.4421286031042129) internal successors, (3252), 2255 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states 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 11:44:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 3252 transitions. [2023-11-26 11:44:08,220 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 3252 transitions. Word has length 95 [2023-11-26 11:44:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:08,220 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 3252 transitions. [2023-11-26 11:44:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 3252 transitions. [2023-11-26 11:44:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-26 11:44:08,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:08,224 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, 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] [2023-11-26 11:44:08,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:44:08,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:08,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -58710990, now seen corresponding path program 1 times [2023-11-26 11:44:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:08,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826050441] [2023-11-26 11:44:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:08,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826050441] [2023-11-26 11:44:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826050441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:08,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581296684] [2023-11-26 11:44:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:08,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:08,446 INFO L87 Difference]: Start difference. First operand 2256 states and 3252 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 11:44:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:13,814 INFO L93 Difference]: Finished difference Result 6764 states and 9753 transitions. [2023-11-26 11:44:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2023-11-26 11:44:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:13,845 INFO L225 Difference]: With dead ends: 6764 [2023-11-26 11:44:13,845 INFO L226 Difference]: Without dead ends: 4509 [2023-11-26 11:44:13,848 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 [2023-11-26 11:44:13,850 INFO L413 NwaCegarLoop]: 1368 mSDtfsCounter, 729 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:13,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1375 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-26 11:44:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2023-11-26 11:44:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 4509. [2023-11-26 11:44:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4508 states have (on average 1.3715616681455192) internal successors, (6183), 4508 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states 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 11:44:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 6183 transitions. [2023-11-26 11:44:13,976 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 6183 transitions. Word has length 97 [2023-11-26 11:44:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:13,976 INFO L495 AbstractCegarLoop]: Abstraction has 4509 states and 6183 transitions. [2023-11-26 11:44:13,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 11:44:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 6183 transitions. [2023-11-26 11:44:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:44:13,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:13,980 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, 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] [2023-11-26 11:44:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:44:13,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:13,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1610038751, now seen corresponding path program 1 times [2023-11-26 11:44:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988027355] [2023-11-26 11:44:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:13,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:14,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988027355] [2023-11-26 11:44:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988027355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38558975] [2023-11-26 11:44:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:14,353 INFO L87 Difference]: Start difference. First operand 4509 states and 6183 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:44:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:21,401 INFO L93 Difference]: Finished difference Result 9768 states and 13272 transitions. [2023-11-26 11:44:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2023-11-26 11:44:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:21,436 INFO L225 Difference]: With dead ends: 9768 [2023-11-26 11:44:21,437 INFO L226 Difference]: Without dead ends: 5260 [2023-11-26 11:44:21,443 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 [2023-11-26 11:44:21,444 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 2181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4829 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 5488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:21,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2181 Valid, 238 Invalid, 5488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4829 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-26 11:44:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2023-11-26 11:44:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 5260. [2023-11-26 11:44:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5260 states, 5259 states have (on average 1.2979653926602015) internal successors, (6826), 5259 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states 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 11:44:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 6826 transitions. [2023-11-26 11:44:21,596 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 6826 transitions. Word has length 103 [2023-11-26 11:44:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:21,597 INFO L495 AbstractCegarLoop]: Abstraction has 5260 states and 6826 transitions. [2023-11-26 11:44:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:44:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 6826 transitions. [2023-11-26 11:44:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-26 11:44:21,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:21,601 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, 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] [2023-11-26 11:44:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:44:21,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 65591025, now seen corresponding path program 1 times [2023-11-26 11:44:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010026703] [2023-11-26 11:44:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:22,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010026703] [2023-11-26 11:44:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010026703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:22,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322693220] [2023-11-26 11:44:22,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:22,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:22,169 INFO L87 Difference]: Start difference. First operand 5260 states and 6826 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 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 11:44:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:27,912 INFO L93 Difference]: Finished difference Result 12809 states and 17220 transitions. [2023-11-26 11:44:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 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) Word has length 174 [2023-11-26 11:44:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:27,960 INFO L225 Difference]: With dead ends: 12809 [2023-11-26 11:44:27,960 INFO L226 Difference]: Without dead ends: 8264 [2023-11-26 11:44:27,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:27,969 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 702 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:27,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 609 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-26 11:44:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2023-11-26 11:44:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 7513. [2023-11-26 11:44:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 1.213125665601704) internal successors, (9113), 7512 states have internal predecessors, (9113), 0 states have call successors, (0), 0 states 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 11:44:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 9113 transitions. [2023-11-26 11:44:28,172 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 9113 transitions. Word has length 174 [2023-11-26 11:44:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:28,184 INFO L495 AbstractCegarLoop]: Abstraction has 7513 states and 9113 transitions. [2023-11-26 11:44:28,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 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 11:44:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 9113 transitions. [2023-11-26 11:44:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-26 11:44:28,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:28,193 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, 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, 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, 1, 1] [2023-11-26 11:44:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:44:28,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:28,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1812478348, now seen corresponding path program 1 times [2023-11-26 11:44:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64875607] [2023-11-26 11:44:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-26 11:44:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64875607] [2023-11-26 11:44:28,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64875607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:28,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:28,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546614474] [2023-11-26 11:44:28,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:28,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:28,677 INFO L87 Difference]: Start difference. First operand 7513 states and 9113 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:33,647 INFO L93 Difference]: Finished difference Result 18782 states and 23428 transitions. [2023-11-26 11:44:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2023-11-26 11:44:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:33,697 INFO L225 Difference]: With dead ends: 18782 [2023-11-26 11:44:33,697 INFO L226 Difference]: Without dead ends: 12021 [2023-11-26 11:44:33,709 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 [2023-11-26 11:44:33,710 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:33,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-26 11:44:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12021 states. [2023-11-26 11:44:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 11268. [2023-11-26 11:44:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 11267 states have (on average 1.1975681192864116) internal successors, (13493), 11267 states have internal predecessors, (13493), 0 states have call successors, (0), 0 states 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 11:44:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 13493 transitions. [2023-11-26 11:44:33,964 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 13493 transitions. Word has length 248 [2023-11-26 11:44:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:33,965 INFO L495 AbstractCegarLoop]: Abstraction has 11268 states and 13493 transitions. [2023-11-26 11:44:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 13493 transitions. [2023-11-26 11:44:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-26 11:44:33,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:33,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2023-11-26 11:44:33,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:44:33,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:33,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1858984824, now seen corresponding path program 1 times [2023-11-26 11:44:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258227651] [2023-11-26 11:44:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 11:44:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258227651] [2023-11-26 11:44:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258227651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:35,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240266593] [2023-11-26 11:44:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:35,480 INFO L87 Difference]: Start difference. First operand 11268 states and 13493 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)