./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya --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 a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:46:44,674 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:46:44,740 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:46:44,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:46:44,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:46:44,768 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:46:44,769 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:46:44,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:46:44,770 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:46:44,771 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:46:44,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:46:44,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:46:44,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:46:44,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:46:44,774 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:46:44,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:46:44,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:46:44,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:46:44,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:46:44,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:46:44,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:46:44,778 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:46:44,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:46:44,779 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:46:44,779 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:46:44,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:46:44,780 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:46:44,780 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:46:44,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:46:44,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:46:44,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:46:44,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:46:44,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:46:44,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:46:44,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:46:44,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:46:44,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:46:44,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:46:44,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:46:44,784 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:46:44,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:46:44,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:46:44,785 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_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f [2023-11-28 23:46:44,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:46:45,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:46:45,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:46:45,019 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:46:45,019 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:46:45,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-28 23:46:47,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:46:47,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:46:47,926 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-28 23:46:47,934 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/data/cab76b81f/8925dc8388ad4c1aa73bff8a6007bbbf/FLAGf8561897d [2023-11-28 23:46:47,946 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/data/cab76b81f/8925dc8388ad4c1aa73bff8a6007bbbf [2023-11-28 23:46:47,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:46:47,949 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:46:47,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:46:47,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:46:47,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:46:47,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:46:47" (1/1) ... [2023-11-28 23:46:47,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9d5ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:47, skipping insertion in model container [2023-11-28 23:46:47,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:46:47" (1/1) ... [2023-11-28 23:46:47,993 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:46:48,179 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_8e09d283-89f4-463d-810d-cac1dd0c1d64/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2023-11-28 23:46:48,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:46:48,210 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:46:48,240 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_8e09d283-89f4-463d-810d-cac1dd0c1d64/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2023-11-28 23:46:48,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:46:48,268 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:46:48,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48 WrapperNode [2023-11-28 23:46:48,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:46:48,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:46:48,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:46:48,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:46:48,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,311 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 292 [2023-11-28 23:46:48,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:46:48,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:46:48,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:46:48,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:46:48,322 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,338 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]. [2023-11-28 23:46:48,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:46:48,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:46:48,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:46:48,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:46:48,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (1/1) ... [2023-11-28 23:46:48,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:46:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:48,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:46:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:46:48,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:46:48,525 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:46:48,528 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:46:48,799 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:46:48,830 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:46:48,830 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-28 23:46:48,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:46:48 BoogieIcfgContainer [2023-11-28 23:46:48,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:46:48,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:46:48,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:46:48,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:46:48,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:46:47" (1/3) ... [2023-11-28 23:46:48,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f6268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:46:48, skipping insertion in model container [2023-11-28 23:46:48,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:48" (2/3) ... [2023-11-28 23:46:48,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f6268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:46:48, skipping insertion in model container [2023-11-28 23:46:48,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:46:48" (3/3) ... [2023-11-28 23:46:48,840 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-28 23:46:48,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:46:48,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:46:48,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:46:48,913 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;@49f96d5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:46:48,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:46:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 60 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-28 23:46:48,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:48,926 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] [2023-11-28 23:46:48,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:48,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1846233322, now seen corresponding path program 1 times [2023-11-28 23:46:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898747416] [2023-11-28 23:46:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898747416] [2023-11-28 23:46:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898747416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:49,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845223103] [2023-11-28 23:46:49,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:49,254 INFO L87 Difference]: Start difference. First operand has 61 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 60 states have internal predecessors, (101), 0 states have call successors, (0), 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 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:49,298 INFO L93 Difference]: Finished difference Result 139 states and 220 transitions. [2023-11-28 23:46:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2023-11-28 23:46:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:49,308 INFO L225 Difference]: With dead ends: 139 [2023-11-28 23:46:49,308 INFO L226 Difference]: Without dead ends: 88 [2023-11-28 23:46:49,311 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 [2023-11-28 23:46:49,313 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 67 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:49,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 207 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-28 23:46:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-11-28 23:46:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 85 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 123 transitions. [2023-11-28 23:46:49,349 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 123 transitions. Word has length 35 [2023-11-28 23:46:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:49,350 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 123 transitions. [2023-11-28 23:46:49,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 123 transitions. [2023-11-28 23:46:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-28 23:46:49,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:49,352 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] [2023-11-28 23:46:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:46:49,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:49,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 955971599, now seen corresponding path program 1 times [2023-11-28 23:46:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908509288] [2023-11-28 23:46:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908509288] [2023-11-28 23:46:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908509288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:49,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974535847] [2023-11-28 23:46:49,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:49,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:49,464 INFO L87 Difference]: Start difference. First operand 86 states and 123 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:49,486 INFO L93 Difference]: Finished difference Result 206 states and 307 transitions. [2023-11-28 23:46:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2023-11-28 23:46:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:49,489 INFO L225 Difference]: With dead ends: 206 [2023-11-28 23:46:49,489 INFO L226 Difference]: Without dead ends: 138 [2023-11-28 23:46:49,490 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 [2023-11-28 23:46:49,492 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:49,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-28 23:46:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-11-28 23:46:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.474074074074074) internal successors, (199), 135 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2023-11-28 23:46:49,510 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 36 [2023-11-28 23:46:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:49,510 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2023-11-28 23:46:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2023-11-28 23:46:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 23:46:49,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:49,513 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] [2023-11-28 23:46:49,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:46:49,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:49,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1789838468, now seen corresponding path program 1 times [2023-11-28 23:46:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648189484] [2023-11-28 23:46:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:49,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648189484] [2023-11-28 23:46:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648189484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:49,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704446630] [2023-11-28 23:46:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:49,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:49,603 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:49,646 INFO L93 Difference]: Finished difference Result 340 states and 509 transitions. [2023-11-28 23:46:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2023-11-28 23:46:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:49,650 INFO L225 Difference]: With dead ends: 340 [2023-11-28 23:46:49,650 INFO L226 Difference]: Without dead ends: 222 [2023-11-28 23:46:49,651 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 [2023-11-28 23:46:49,652 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-28 23:46:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2023-11-28 23:46:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.4748858447488584) internal successors, (323), 219 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 323 transitions. [2023-11-28 23:46:49,674 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 323 transitions. Word has length 37 [2023-11-28 23:46:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:49,674 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 323 transitions. [2023-11-28 23:46:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 323 transitions. [2023-11-28 23:46:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-28 23:46:49,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:49,676 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] [2023-11-28 23:46:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:46:49,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash 235389131, now seen corresponding path program 1 times [2023-11-28 23:46:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514075206] [2023-11-28 23:46:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514075206] [2023-11-28 23:46:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514075206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:49,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:49,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881763075] [2023-11-28 23:46:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:49,804 INFO L87 Difference]: Start difference. First operand 220 states and 323 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:49,909 INFO L93 Difference]: Finished difference Result 1432 states and 2153 transitions. [2023-11-28 23:46:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:46:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-28 23:46:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:49,917 INFO L225 Difference]: With dead ends: 1432 [2023-11-28 23:46:49,917 INFO L226 Difference]: Without dead ends: 1230 [2023-11-28 23:46:49,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:46:49,920 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 404 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:49,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 411 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-28 23:46:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 420. [2023-11-28 23:46:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.477326968973747) internal successors, (619), 419 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 619 transitions. [2023-11-28 23:46:49,952 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 619 transitions. Word has length 38 [2023-11-28 23:46:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:49,953 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 619 transitions. [2023-11-28 23:46:49,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 619 transitions. [2023-11-28 23:46:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 23:46:49,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:49,954 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, 1] [2023-11-28 23:46:49,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:46:49,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:49,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1948832295, now seen corresponding path program 1 times [2023-11-28 23:46:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002532916] [2023-11-28 23:46:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:50,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:50,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002532916] [2023-11-28 23:46:50,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002532916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:50,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:50,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669742148] [2023-11-28 23:46:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:50,027 INFO L87 Difference]: Start difference. First operand 420 states and 619 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:50,049 INFO L93 Difference]: Finished difference Result 1022 states and 1519 transitions. [2023-11-28 23:46:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2023-11-28 23:46:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:50,054 INFO L225 Difference]: With dead ends: 1022 [2023-11-28 23:46:50,054 INFO L226 Difference]: Without dead ends: 620 [2023-11-28 23:46:50,055 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 [2023-11-28 23:46:50,056 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:50,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 147 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-28 23:46:50,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 618. [2023-11-28 23:46:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.473257698541329) internal successors, (909), 617 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 909 transitions. [2023-11-28 23:46:50,076 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 909 transitions. Word has length 40 [2023-11-28 23:46:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:50,076 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 909 transitions. [2023-11-28 23:46:50,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 909 transitions. [2023-11-28 23:46:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 23:46:50,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:50,078 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, 1] [2023-11-28 23:46:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:46:50,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:50,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1969834950, now seen corresponding path program 1 times [2023-11-28 23:46:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:50,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925457589] [2023-11-28 23:46:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925457589] [2023-11-28 23:46:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925457589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:50,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722211263] [2023-11-28 23:46:50,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:50,256 INFO L87 Difference]: Start difference. First operand 618 states and 909 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:50,319 INFO L93 Difference]: Finished difference Result 1218 states and 1799 transitions. [2023-11-28 23:46:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2023-11-28 23:46:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:50,324 INFO L225 Difference]: With dead ends: 1218 [2023-11-28 23:46:50,324 INFO L226 Difference]: Without dead ends: 620 [2023-11-28 23:46:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:46:50,341 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 115 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:50,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 189 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-28 23:46:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 618. [2023-11-28 23:46:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.453808752025932) internal successors, (897), 617 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 897 transitions. [2023-11-28 23:46:50,363 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 897 transitions. Word has length 40 [2023-11-28 23:46:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:50,364 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 897 transitions. [2023-11-28 23:46:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 897 transitions. [2023-11-28 23:46:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-28 23:46:50,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:50,365 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, 1, 1] [2023-11-28 23:46:50,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:46:50,365 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:50,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:50,366 INFO L85 PathProgramCache]: Analyzing trace with hash 933431880, now seen corresponding path program 1 times [2023-11-28 23:46:50,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:50,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939366621] [2023-11-28 23:46:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939366621] [2023-11-28 23:46:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939366621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:50,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:50,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554763289] [2023-11-28 23:46:50,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:50,473 INFO L87 Difference]: Start difference. First operand 618 states and 897 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:50,544 INFO L93 Difference]: Finished difference Result 1216 states and 1774 transitions. [2023-11-28 23:46:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:50,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2023-11-28 23:46:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:50,549 INFO L225 Difference]: With dead ends: 1216 [2023-11-28 23:46:50,549 INFO L226 Difference]: Without dead ends: 618 [2023-11-28 23:46:50,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:46:50,552 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:50,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-11-28 23:46:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2023-11-28 23:46:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.4343598055105349) internal successors, (885), 617 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 885 transitions. [2023-11-28 23:46:50,573 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 885 transitions. Word has length 41 [2023-11-28 23:46:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:50,574 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 885 transitions. [2023-11-28 23:46:50,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 885 transitions. [2023-11-28 23:46:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-28 23:46:50,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:50,575 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, 1, 1] [2023-11-28 23:46:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:46:50,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:50,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1798964269, now seen corresponding path program 1 times [2023-11-28 23:46:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:50,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184607893] [2023-11-28 23:46:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:50,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184607893] [2023-11-28 23:46:50,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184607893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:50,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:50,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491082308] [2023-11-28 23:46:50,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:50,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:50,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:50,758 INFO L87 Difference]: Start difference. First operand 618 states and 885 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:50,799 INFO L93 Difference]: Finished difference Result 910 states and 1293 transitions. [2023-11-28 23:46:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:46:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2023-11-28 23:46:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:50,805 INFO L225 Difference]: With dead ends: 910 [2023-11-28 23:46:50,805 INFO L226 Difference]: Without dead ends: 908 [2023-11-28 23:46:50,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:46:50,806 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 105 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:50,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 346 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2023-11-28 23:46:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 634. [2023-11-28 23:46:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.4044233807266984) internal successors, (889), 633 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 889 transitions. [2023-11-28 23:46:50,827 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 889 transitions. Word has length 41 [2023-11-28 23:46:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:50,827 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 889 transitions. [2023-11-28 23:46:50,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 889 transitions. [2023-11-28 23:46:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 23:46:50,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:50,830 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:46:50,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:46:50,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:50,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1444990746, now seen corresponding path program 1 times [2023-11-28 23:46:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:50,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441210281] [2023-11-28 23:46:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:50,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:46:50,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441210281] [2023-11-28 23:46:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441210281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:50,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565214187] [2023-11-28 23:46:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:50,948 INFO L87 Difference]: Start difference. First operand 634 states and 889 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:51,033 INFO L93 Difference]: Finished difference Result 2580 states and 3630 transitions. [2023-11-28 23:46:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 59 [2023-11-28 23:46:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:51,048 INFO L225 Difference]: With dead ends: 2580 [2023-11-28 23:46:51,048 INFO L226 Difference]: Without dead ends: 1966 [2023-11-28 23:46:51,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:46:51,050 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 198 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:51,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 321 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-11-28 23:46:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1246. [2023-11-28 23:46:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 1.4016064257028114) internal successors, (1745), 1245 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1745 transitions. [2023-11-28 23:46:51,088 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1745 transitions. Word has length 59 [2023-11-28 23:46:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:51,088 INFO L495 AbstractCegarLoop]: Abstraction has 1246 states and 1745 transitions. [2023-11-28 23:46:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1745 transitions. [2023-11-28 23:46:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 23:46:51,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:51,090 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:46:51,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:46:51,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:51,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:51,091 INFO L85 PathProgramCache]: Analyzing trace with hash -291044640, now seen corresponding path program 1 times [2023-11-28 23:46:51,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:51,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807058190] [2023-11-28 23:46:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:46:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807058190] [2023-11-28 23:46:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807058190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:51,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:51,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721842008] [2023-11-28 23:46:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:51,203 INFO L87 Difference]: Start difference. First operand 1246 states and 1745 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:51,270 INFO L93 Difference]: Finished difference Result 3192 states and 4486 transitions. [2023-11-28 23:46:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-28 23:46:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:51,281 INFO L225 Difference]: With dead ends: 3192 [2023-11-28 23:46:51,281 INFO L226 Difference]: Without dead ends: 2578 [2023-11-28 23:46:51,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:46:51,282 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 192 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:51,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 358 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2023-11-28 23:46:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2158. [2023-11-28 23:46:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 1.3959202596198423) internal successors, (3011), 2157 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 3011 transitions. [2023-11-28 23:46:51,322 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 3011 transitions. Word has length 59 [2023-11-28 23:46:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:51,322 INFO L495 AbstractCegarLoop]: Abstraction has 2158 states and 3011 transitions. [2023-11-28 23:46:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 3011 transitions. [2023-11-28 23:46:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 23:46:51,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:51,324 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:46:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:46:51,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:51,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:51,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1148945318, now seen corresponding path program 1 times [2023-11-28 23:46:51,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:51,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483885704] [2023-11-28 23:46:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:46:51,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:51,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483885704] [2023-11-28 23:46:51,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483885704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:51,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:51,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780871723] [2023-11-28 23:46:51,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:51,406 INFO L87 Difference]: Start difference. First operand 2158 states and 3011 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:51,466 INFO L93 Difference]: Finished difference Result 3412 states and 4790 transitions. [2023-11-28 23:46:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-28 23:46:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:51,479 INFO L225 Difference]: With dead ends: 3412 [2023-11-28 23:46:51,480 INFO L226 Difference]: Without dead ends: 2994 [2023-11-28 23:46:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:46:51,481 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 194 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 321 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2023-11-28 23:46:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2574. [2023-11-28 23:46:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2573 states have (on average 1.3972017100660707) internal successors, (3595), 2573 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3595 transitions. [2023-11-28 23:46:51,549 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3595 transitions. Word has length 59 [2023-11-28 23:46:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:51,549 INFO L495 AbstractCegarLoop]: Abstraction has 2574 states and 3595 transitions. [2023-11-28 23:46:51,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3595 transitions. [2023-11-28 23:46:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-28 23:46:51,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:51,551 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:46:51,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:46:51,551 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:51,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2032476449, now seen corresponding path program 1 times [2023-11-28 23:46:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:51,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46682968] [2023-11-28 23:46:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46682968] [2023-11-28 23:46:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46682968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:46:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551936293] [2023-11-28 23:46:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:51,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:51,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:46:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:52,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:46:52,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:52,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551936293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:53,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:46:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-28 23:46:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036945358] [2023-11-28 23:46:53,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 23:46:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 23:46:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:46:53,176 INFO L87 Difference]: Start difference. First operand 2574 states and 3595 transitions. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:09,231 INFO L93 Difference]: Finished difference Result 59770 states and 80218 transitions. [2023-11-28 23:47:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2023-11-28 23:47:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 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 61 [2023-11-28 23:47:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:09,433 INFO L225 Difference]: With dead ends: 59770 [2023-11-28 23:47:09,433 INFO L226 Difference]: Without dead ends: 57216 [2023-11-28 23:47:09,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57642 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=12924, Invalid=115598, Unknown=0, NotChecked=0, Total=128522 [2023-11-28 23:47:09,471 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 8524 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8524 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:09,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8524 Valid, 2394 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 23:47:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57216 states. [2023-11-28 23:47:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57216 to 12246. [2023-11-28 23:47:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12246 states, 12245 states have (on average 1.3559820334830543) internal successors, (16604), 12245 states have internal predecessors, (16604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12246 states to 12246 states and 16604 transitions. [2023-11-28 23:47:10,088 INFO L78 Accepts]: Start accepts. Automaton has 12246 states and 16604 transitions. Word has length 61 [2023-11-28 23:47:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:10,089 INFO L495 AbstractCegarLoop]: Abstraction has 12246 states and 16604 transitions. [2023-11-28 23:47:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 12246 states and 16604 transitions. [2023-11-28 23:47:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-28 23:47:10,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:10,091 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:47:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:47:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:10,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:10,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2130724868, now seen corresponding path program 1 times [2023-11-28 23:47:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481848465] [2023-11-28 23:47:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:10,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:10,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481848465] [2023-11-28 23:47:10,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481848465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:47:10,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608085165] [2023-11-28 23:47:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:10,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:10,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:10,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:47:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:10,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:47:10,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:11,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608085165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:47:12,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:47:12,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-11-28 23:47:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340532277] [2023-11-28 23:47:12,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:47:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 23:47:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 23:47:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2023-11-28 23:47:12,174 INFO L87 Difference]: Start difference. First operand 12246 states and 16604 transitions. Second operand has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 28 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:49,690 INFO L93 Difference]: Finished difference Result 136795 states and 179770 transitions. [2023-11-28 23:47:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2023-11-28 23:47:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 28 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-28 23:47:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:49,810 INFO L225 Difference]: With dead ends: 136795 [2023-11-28 23:47:49,810 INFO L226 Difference]: Without dead ends: 124569 [2023-11-28 23:47:49,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 565 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157834 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=36864, Invalid=284058, Unknown=0, NotChecked=0, Total=320922 [2023-11-28 23:47:49,852 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 24723 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24723 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24723 Valid, 2294 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 23:47:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124569 states. [2023-11-28 23:47:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124569 to 30725. [2023-11-28 23:47:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30725 states, 30724 states have (on average 1.3454302825152975) internal successors, (41337), 30724 states have internal predecessors, (41337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30725 states to 30725 states and 41337 transitions. [2023-11-28 23:47:50,791 INFO L78 Accepts]: Start accepts. Automaton has 30725 states and 41337 transitions. Word has length 61 [2023-11-28 23:47:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:50,791 INFO L495 AbstractCegarLoop]: Abstraction has 30725 states and 41337 transitions. [2023-11-28 23:47:50,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 28 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30725 states and 41337 transitions. [2023-11-28 23:47:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-28 23:47:50,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:50,793 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:47:50,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 23:47:50,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:50,994 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:50,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1044413111, now seen corresponding path program 1 times [2023-11-28 23:47:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:50,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159198094] [2023-11-28 23:47:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:51,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:51,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159198094] [2023-11-28 23:47:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159198094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:47:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:47:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:47:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226062987] [2023-11-28 23:47:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:47:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:47:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:47:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:47:51,055 INFO L87 Difference]: Start difference. First operand 30725 states and 41337 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:51,158 INFO L93 Difference]: Finished difference Result 54207 states and 73229 transitions. [2023-11-28 23:47:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:47:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-28 23:47:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:51,179 INFO L225 Difference]: With dead ends: 54207 [2023-11-28 23:47:51,179 INFO L226 Difference]: Without dead ends: 23502 [2023-11-28 23:47:51,199 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 [2023-11-28 23:47:51,199 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 33 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:51,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:47:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23502 states. [2023-11-28 23:47:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23502 to 23452. [2023-11-28 23:47:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23452 states, 23451 states have (on average 1.3357212912029337) internal successors, (31324), 23451 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23452 states to 23452 states and 31324 transitions. [2023-11-28 23:47:51,647 INFO L78 Accepts]: Start accepts. Automaton has 23452 states and 31324 transitions. Word has length 62 [2023-11-28 23:47:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:51,647 INFO L495 AbstractCegarLoop]: Abstraction has 23452 states and 31324 transitions. [2023-11-28 23:47:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:47:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 23452 states and 31324 transitions. [2023-11-28 23:47:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-28 23:47:51,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:51,651 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:47:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 23:47:51,652 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:51,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1817929289, now seen corresponding path program 1 times [2023-11-28 23:47:51,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:51,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327010878] [2023-11-28 23:47:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327010878] [2023-11-28 23:47:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327010878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:47:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391953163] [2023-11-28 23:47:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:52,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:52,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:47:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:52,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-28 23:47:52,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:54,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:47:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391953163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:47:56,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:47:56,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 22] total 54 [2023-11-28 23:47:56,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513317208] [2023-11-28 23:47:56,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:47:56,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-28 23:47:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-28 23:47:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2492, Unknown=0, NotChecked=0, Total=2862 [2023-11-28 23:47:56,980 INFO L87 Difference]: Start difference. First operand 23452 states and 31324 transitions. Second operand has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 54 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:39,630 INFO L93 Difference]: Finished difference Result 162845 states and 210846 transitions. [2023-11-28 23:49:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2023-11-28 23:49:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 54 states have internal predecessors, (168), 0 states have call successors, (0), 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 62 [2023-11-28 23:49:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:39,790 INFO L225 Difference]: With dead ends: 162845 [2023-11-28 23:49:39,790 INFO L226 Difference]: Without dead ends: 147207 [2023-11-28 23:49:39,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178247 ImplicationChecksByTransitivity, 93.3s TimeCoverageRelationStatistics Valid=42568, Invalid=346184, Unknown=0, NotChecked=0, Total=388752 [2023-11-28 23:49:39,845 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 11310 mSDsluCounter, 13640 mSDsCounter, 0 mSdLazyCounter, 9152 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11310 SdHoareTripleChecker+Valid, 14353 SdHoareTripleChecker+Invalid, 9353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:39,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11310 Valid, 14353 Invalid, 9353 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 9152 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-11-28 23:49:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147207 states. [2023-11-28 23:49:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147207 to 34384. [2023-11-28 23:49:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34384 states, 34383 states have (on average 1.3423785010034028) internal successors, (46155), 34383 states have internal predecessors, (46155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34384 states to 34384 states and 46155 transitions. [2023-11-28 23:49:40,814 INFO L78 Accepts]: Start accepts. Automaton has 34384 states and 46155 transitions. Word has length 62 [2023-11-28 23:49:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:40,814 INFO L495 AbstractCegarLoop]: Abstraction has 34384 states and 46155 transitions. [2023-11-28 23:49:40,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 54 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34384 states and 46155 transitions. [2023-11-28 23:49:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-28 23:49:40,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:40,817 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:49:40,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:49:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:41,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:41,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash -451443552, now seen corresponding path program 1 times [2023-11-28 23:49:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:41,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310590240] [2023-11-28 23:49:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:41,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:49:41,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:41,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310590240] [2023-11-28 23:49:41,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310590240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:49:41,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:49:41,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:49:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788656555] [2023-11-28 23:49:41,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:41,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:49:41,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:49:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:49:41,057 INFO L87 Difference]: Start difference. First operand 34384 states and 46155 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:41,272 INFO L93 Difference]: Finished difference Result 64227 states and 86192 transitions. [2023-11-28 23:49:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:49:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-28 23:49:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:41,318 INFO L225 Difference]: With dead ends: 64227 [2023-11-28 23:49:41,318 INFO L226 Difference]: Without dead ends: 29899 [2023-11-28 23:49:41,337 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 [2023-11-28 23:49:41,338 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:41,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 101 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:49:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29899 states. [2023-11-28 23:49:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29899 to 29899. [2023-11-28 23:49:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29899 states, 29898 states have (on average 1.3257408522309184) internal successors, (39637), 29898 states have internal predecessors, (39637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29899 states to 29899 states and 39637 transitions. [2023-11-28 23:49:41,931 INFO L78 Accepts]: Start accepts. Automaton has 29899 states and 39637 transitions. Word has length 63 [2023-11-28 23:49:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:41,932 INFO L495 AbstractCegarLoop]: Abstraction has 29899 states and 39637 transitions. [2023-11-28 23:49:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29899 states and 39637 transitions. [2023-11-28 23:49:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-28 23:49:41,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:41,935 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:49:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:49:41,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:41,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash -28144251, now seen corresponding path program 1 times [2023-11-28 23:49:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:41,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151455627] [2023-11-28 23:49:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-28 23:49:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151455627] [2023-11-28 23:49:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151455627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:49:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:49:41,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:49:41,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495434869] [2023-11-28 23:49:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:49:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:49:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:49:41,977 INFO L87 Difference]: Start difference. First operand 29899 states and 39637 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:42,132 INFO L93 Difference]: Finished difference Result 54708 states and 72579 transitions. [2023-11-28 23:49:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:49:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-28 23:49:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:42,163 INFO L225 Difference]: With dead ends: 54708 [2023-11-28 23:49:42,163 INFO L226 Difference]: Without dead ends: 24850 [2023-11-28 23:49:42,181 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 [2023-11-28 23:49:42,182 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:42,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 90 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:49:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24850 states. [2023-11-28 23:49:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24850 to 24850. [2023-11-28 23:49:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24850 states, 24849 states have (on average 1.303110789166566) internal successors, (32381), 24849 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24850 states to 24850 states and 32381 transitions. [2023-11-28 23:49:42,464 INFO L78 Accepts]: Start accepts. Automaton has 24850 states and 32381 transitions. Word has length 64 [2023-11-28 23:49:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:42,464 INFO L495 AbstractCegarLoop]: Abstraction has 24850 states and 32381 transitions. [2023-11-28 23:49:42,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 24850 states and 32381 transitions. [2023-11-28 23:49:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-28 23:49:42,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:42,467 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 23:49:42,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 23:49:42,467 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:42,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash -201838950, now seen corresponding path program 1 times [2023-11-28 23:49:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031263213] [2023-11-28 23:49:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:49:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031263213] [2023-11-28 23:49:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031263213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:49:42,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:49:42,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:49:42,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023053747] [2023-11-28 23:49:42,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:42,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:49:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:49:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:49:42,519 INFO L87 Difference]: Start difference. First operand 24850 states and 32381 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:42,793 INFO L93 Difference]: Finished difference Result 44958 states and 58616 transitions. [2023-11-28 23:49:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:49:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-28 23:49:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:42,808 INFO L225 Difference]: With dead ends: 44958 [2023-11-28 23:49:42,809 INFO L226 Difference]: Without dead ends: 20144 [2023-11-28 23:49:42,815 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 [2023-11-28 23:49:42,816 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:42,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:49:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20144 states. [2023-11-28 23:49:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20144 to 20144. [2023-11-28 23:49:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20144 states, 20143 states have (on average 1.2854589683761108) internal successors, (25893), 20143 states have internal predecessors, (25893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20144 states to 20144 states and 25893 transitions. [2023-11-28 23:49:43,007 INFO L78 Accepts]: Start accepts. Automaton has 20144 states and 25893 transitions. Word has length 64 [2023-11-28 23:49:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:43,007 INFO L495 AbstractCegarLoop]: Abstraction has 20144 states and 25893 transitions. [2023-11-28 23:49:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 20144 states and 25893 transitions. [2023-11-28 23:49:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-28 23:49:43,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:43,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-28 23:49:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 23:49:43,010 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1648199387, now seen corresponding path program 1 times [2023-11-28 23:49:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300423273] [2023-11-28 23:49:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 23:49:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300423273] [2023-11-28 23:49:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300423273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:49:43,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:49:43,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:49:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066041068] [2023-11-28 23:49:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:43,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:49:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:49:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:49:43,054 INFO L87 Difference]: Start difference. First operand 20144 states and 25893 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:43,130 INFO L93 Difference]: Finished difference Result 40027 states and 51525 transitions. [2023-11-28 23:49:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:49:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-28 23:49:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:43,147 INFO L225 Difference]: With dead ends: 40027 [2023-11-28 23:49:43,147 INFO L226 Difference]: Without dead ends: 19193 [2023-11-28 23:49:43,157 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 [2023-11-28 23:49:43,157 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:43,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:49:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19193 states. [2023-11-28 23:49:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19193 to 19175. [2023-11-28 23:49:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19175 states, 19174 states have (on average 1.262021487430896) internal successors, (24198), 19174 states have internal predecessors, (24198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19175 states to 19175 states and 24198 transitions. [2023-11-28 23:49:43,504 INFO L78 Accepts]: Start accepts. Automaton has 19175 states and 24198 transitions. Word has length 83 [2023-11-28 23:49:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:43,504 INFO L495 AbstractCegarLoop]: Abstraction has 19175 states and 24198 transitions. [2023-11-28 23:49:43,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 19175 states and 24198 transitions. [2023-11-28 23:49:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-28 23:49:43,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:43,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-28 23:49:43,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 23:49:43,508 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:43,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1818011334, now seen corresponding path program 1 times [2023-11-28 23:49:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:43,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501149023] [2023-11-28 23:49:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 23:49:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501149023] [2023-11-28 23:49:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501149023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:49:43,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:49:43,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:49:43,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017150883] [2023-11-28 23:49:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:43,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:49:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:49:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:49:43,598 INFO L87 Difference]: Start difference. First operand 19175 states and 24198 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:43,668 INFO L93 Difference]: Finished difference Result 27533 states and 34734 transitions. [2023-11-28 23:49:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:49:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 84 [2023-11-28 23:49:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:43,676 INFO L225 Difference]: With dead ends: 27533 [2023-11-28 23:49:43,676 INFO L226 Difference]: Without dead ends: 8376 [2023-11-28 23:49:43,685 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 [2023-11-28 23:49:43,686 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:43,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:49:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2023-11-28 23:49:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 8374. [2023-11-28 23:49:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8374 states, 8373 states have (on average 1.2349217723635495) internal successors, (10340), 8373 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 10340 transitions. [2023-11-28 23:49:43,799 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 10340 transitions. Word has length 84 [2023-11-28 23:49:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:43,799 INFO L495 AbstractCegarLoop]: Abstraction has 8374 states and 10340 transitions. [2023-11-28 23:49:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 10340 transitions. [2023-11-28 23:49:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-28 23:49:43,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:43,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-28 23:49:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-28 23:49:43,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:43,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1327407628, now seen corresponding path program 1 times [2023-11-28 23:49:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:43,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666982581] [2023-11-28 23:49:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:43,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:43,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666982581] [2023-11-28 23:49:43,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666982581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:49:43,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440074488] [2023-11-28 23:49:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:43,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:43,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:43,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:43,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:49:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:44,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:49:44,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:44,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:44,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440074488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:49:44,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:49:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-28 23:49:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253791897] [2023-11-28 23:49:44,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:49:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:49:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:49:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:49:44,500 INFO L87 Difference]: Start difference. First operand 8374 states and 10340 transitions. Second operand has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:44,711 INFO L93 Difference]: Finished difference Result 14905 states and 18347 transitions. [2023-11-28 23:49:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:49:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 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 85 [2023-11-28 23:49:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:44,722 INFO L225 Difference]: With dead ends: 14905 [2023-11-28 23:49:44,722 INFO L226 Difference]: Without dead ends: 8819 [2023-11-28 23:49:44,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:49:44,728 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 177 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:44,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 244 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:49:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2023-11-28 23:49:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8130. [2023-11-28 23:49:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8130 states, 8129 states have (on average 1.2183540410874647) internal successors, (9904), 8129 states have internal predecessors, (9904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 9904 transitions. [2023-11-28 23:49:44,886 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 9904 transitions. Word has length 85 [2023-11-28 23:49:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:44,886 INFO L495 AbstractCegarLoop]: Abstraction has 8130 states and 9904 transitions. [2023-11-28 23:49:44,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 9904 transitions. [2023-11-28 23:49:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-28 23:49:44,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:44,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-11-28 23:49:44,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:49:45,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:45,090 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:45,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 811470817, now seen corresponding path program 1 times [2023-11-28 23:49:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995931018] [2023-11-28 23:49:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995931018] [2023-11-28 23:49:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995931018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:49:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734755301] [2023-11-28 23:49:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:45,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:49:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:45,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 23:49:45,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:46,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734755301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:49:49,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:49:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 40 [2023-11-28 23:49:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897859007] [2023-11-28 23:49:49,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:49:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-28 23:49:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-28 23:49:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 23:49:49,447 INFO L87 Difference]: Start difference. First operand 8130 states and 9904 transitions. Second operand has 41 states, 41 states have (on average 6.414634146341464) internal successors, (263), 40 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:57,895 INFO L93 Difference]: Finished difference Result 20009 states and 24686 transitions. [2023-11-28 23:49:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-28 23:49:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.414634146341464) internal successors, (263), 40 states have internal predecessors, (263), 0 states have call successors, (0), 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 105 [2023-11-28 23:49:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:57,906 INFO L225 Difference]: With dead ends: 20009 [2023-11-28 23:49:57,906 INFO L226 Difference]: Without dead ends: 13851 [2023-11-28 23:49:57,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5088 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3426, Invalid=14934, Unknown=0, NotChecked=0, Total=18360 [2023-11-28 23:49:57,911 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5946 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 2942 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5946 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:57,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5946 Valid, 2548 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2942 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-28 23:49:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13851 states. [2023-11-28 23:49:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13851 to 7444. [2023-11-28 23:49:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 1.197769716512159) internal successors, (8915), 7443 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 8915 transitions. [2023-11-28 23:49:58,006 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 8915 transitions. Word has length 105 [2023-11-28 23:49:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:58,007 INFO L495 AbstractCegarLoop]: Abstraction has 7444 states and 8915 transitions. [2023-11-28 23:49:58,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.414634146341464) internal successors, (263), 40 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:49:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 8915 transitions. [2023-11-28 23:49:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-28 23:49:58,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:58,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:49:58,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:49:58,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:58,210 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:58,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash -435396144, now seen corresponding path program 1 times [2023-11-28 23:49:58,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:58,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836856650] [2023-11-28 23:49:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:58,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:49:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836856650] [2023-11-28 23:49:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836856650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:49:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060550444] [2023-11-28 23:49:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:58,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:58,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:49:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:58,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-28 23:49:58,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:50:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:50:00,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:50:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:50:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060550444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:50:03,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:50:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 50 [2023-11-28 23:50:03,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462685525] [2023-11-28 23:50:03,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:50:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-28 23:50:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:50:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-28 23:50:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2298, Unknown=0, NotChecked=0, Total=2450 [2023-11-28 23:50:03,046 INFO L87 Difference]: Start difference. First operand 7444 states and 8915 transitions. Second operand has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:54:26,386 INFO L93 Difference]: Finished difference Result 31324 states and 36917 transitions. [2023-11-28 23:54:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 900 states. [2023-11-28 23:54:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 states have internal predecessors, (290), 0 states have call successors, (0), 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 105 [2023-11-28 23:54:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:54:26,404 INFO L225 Difference]: With dead ends: 31324 [2023-11-28 23:54:26,404 INFO L226 Difference]: Without dead ends: 25710 [2023-11-28 23:54:26,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 946 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418157 ImplicationChecksByTransitivity, 247.2s TimeCoverageRelationStatistics Valid=61239, Invalid=836517, Unknown=0, NotChecked=0, Total=897756 [2023-11-28 23:54:26,445 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 19293 mSDsluCounter, 8212 mSDsCounter, 0 mSdLazyCounter, 12271 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19293 SdHoareTripleChecker+Valid, 8679 SdHoareTripleChecker+Invalid, 12829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 12271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:54:26,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19293 Valid, 8679 Invalid, 12829 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [558 Valid, 12271 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2023-11-28 23:54:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25710 states. [2023-11-28 23:54:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25710 to 7590. [2023-11-28 23:54:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7590 states, 7589 states have (on average 1.1743312689418897) internal successors, (8912), 7589 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7590 states to 7590 states and 8912 transitions. [2023-11-28 23:54:26,564 INFO L78 Accepts]: Start accepts. Automaton has 7590 states and 8912 transitions. Word has length 105 [2023-11-28 23:54:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:54:26,564 INFO L495 AbstractCegarLoop]: Abstraction has 7590 states and 8912 transitions. [2023-11-28 23:54:26,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7590 states and 8912 transitions. [2023-11-28 23:54:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-28 23:54:26,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:54:26,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-28 23:54:26,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:54:26,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:26,767 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:54:26,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 780152663, now seen corresponding path program 1 times [2023-11-28 23:54:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892316785] [2023-11-28 23:54:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-28 23:54:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:54:26,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892316785] [2023-11-28 23:54:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892316785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:54:26,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:54:26,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:54:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86339228] [2023-11-28 23:54:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:54:26,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:54:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:54:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:54:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:54:26,840 INFO L87 Difference]: Start difference. First operand 7590 states and 8912 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:54:26,864 INFO L93 Difference]: Finished difference Result 11508 states and 13569 transitions. [2023-11-28 23:54:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:54:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 106 [2023-11-28 23:54:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:54:26,867 INFO L225 Difference]: With dead ends: 11508 [2023-11-28 23:54:26,867 INFO L226 Difference]: Without dead ends: 3936 [2023-11-28 23:54:26,870 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 [2023-11-28 23:54:26,870 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:54:26,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 111 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:54:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2023-11-28 23:54:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3934. [2023-11-28 23:54:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 1.159674548690567) internal successors, (4561), 3933 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 4561 transitions. [2023-11-28 23:54:26,903 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 4561 transitions. Word has length 106 [2023-11-28 23:54:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:54:26,903 INFO L495 AbstractCegarLoop]: Abstraction has 3934 states and 4561 transitions. [2023-11-28 23:54:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 4561 transitions. [2023-11-28 23:54:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-28 23:54:26,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:54:26,904 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:26,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-28 23:54:26,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:54:26,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash 599717990, now seen corresponding path program 1 times [2023-11-28 23:54:26,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:26,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543135098] [2023-11-28 23:54:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:26,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:54:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543135098] [2023-11-28 23:54:27,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543135098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:54:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141035070] [2023-11-28 23:54:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:54:27,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:54:27,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:54:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:27,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 23:54:27,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:54:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:29,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:54:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141035070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:54:31,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:54:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 52 [2023-11-28 23:54:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898598425] [2023-11-28 23:54:31,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:54:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-28 23:54:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:54:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-28 23:54:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2023-11-28 23:54:31,488 INFO L87 Difference]: Start difference. First operand 3934 states and 4561 transitions. Second operand has 52 states, 52 states have (on average 5.865384615384615) internal successors, (305), 52 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:54:47,412 INFO L93 Difference]: Finished difference Result 14936 states and 16773 transitions. [2023-11-28 23:54:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2023-11-28 23:54:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.865384615384615) internal successors, (305), 52 states have internal predecessors, (305), 0 states have call successors, (0), 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 106 [2023-11-28 23:54:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:54:47,421 INFO L225 Difference]: With dead ends: 14936 [2023-11-28 23:54:47,421 INFO L226 Difference]: Without dead ends: 13519 [2023-11-28 23:54:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18119 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4613, Invalid=50377, Unknown=0, NotChecked=0, Total=54990 [2023-11-28 23:54:47,425 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 4283 mSDsluCounter, 12529 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4283 SdHoareTripleChecker+Valid, 12955 SdHoareTripleChecker+Invalid, 5787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:54:47,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4283 Valid, 12955 Invalid, 5787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-28 23:54:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13519 states. [2023-11-28 23:54:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13519 to 6554. [2023-11-28 23:54:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6554 states, 6553 states have (on average 1.1626735846177323) internal successors, (7619), 6553 states have internal predecessors, (7619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6554 states to 6554 states and 7619 transitions. [2023-11-28 23:54:47,496 INFO L78 Accepts]: Start accepts. Automaton has 6554 states and 7619 transitions. Word has length 106 [2023-11-28 23:54:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:54:47,496 INFO L495 AbstractCegarLoop]: Abstraction has 6554 states and 7619 transitions. [2023-11-28 23:54:47,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.865384615384615) internal successors, (305), 52 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 6554 states and 7619 transitions. [2023-11-28 23:54:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-28 23:54:47,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:54:47,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:47,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:54:47,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:47,698 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:54:47,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1678669033, now seen corresponding path program 1 times [2023-11-28 23:54:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:47,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625423407] [2023-11-28 23:54:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:54:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625423407] [2023-11-28 23:54:48,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625423407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:54:48,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340985957] [2023-11-28 23:54:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:48,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:48,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:54:48,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:54:48,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:54:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:48,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:54:48,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:54:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:49,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:54:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:51,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340985957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:54:51,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:54:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 17] total 51 [2023-11-28 23:54:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445170909] [2023-11-28 23:54:51,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:54:51,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-28 23:54:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:54:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-28 23:54:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2371, Unknown=0, NotChecked=0, Total=2550 [2023-11-28 23:54:51,589 INFO L87 Difference]: Start difference. First operand 6554 states and 7619 transitions. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:44,724 INFO L93 Difference]: Finished difference Result 26594 states and 30381 transitions. [2023-11-28 23:55:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2023-11-28 23:55:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 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 107 [2023-11-28 23:55:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:44,738 INFO L225 Difference]: With dead ends: 26594 [2023-11-28 23:55:44,738 INFO L226 Difference]: Without dead ends: 23562 [2023-11-28 23:55:44,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63880 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=13826, Invalid=149794, Unknown=0, NotChecked=0, Total=163620 [2023-11-28 23:55:44,748 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 5684 mSDsluCounter, 13234 mSDsCounter, 0 mSdLazyCounter, 6640 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5684 SdHoareTripleChecker+Valid, 13679 SdHoareTripleChecker+Invalid, 6716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:44,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5684 Valid, 13679 Invalid, 6716 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 6640 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-28 23:55:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23562 states. [2023-11-28 23:55:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23562 to 11222. [2023-11-28 23:55:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11222 states, 11221 states have (on average 1.1640673736743605) internal successors, (13062), 11221 states have internal predecessors, (13062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11222 states to 11222 states and 13062 transitions. [2023-11-28 23:55:44,914 INFO L78 Accepts]: Start accepts. Automaton has 11222 states and 13062 transitions. Word has length 107 [2023-11-28 23:55:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 11222 states and 13062 transitions. [2023-11-28 23:55:44,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11222 states and 13062 transitions. [2023-11-28 23:55:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-28 23:55:44,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:44,915 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:44,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:55:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:45,116 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:45,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2146307806, now seen corresponding path program 1 times [2023-11-28 23:55:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151982928] [2023-11-28 23:55:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:45,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:45,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151982928] [2023-11-28 23:55:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151982928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:45,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536940238] [2023-11-28 23:55:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:45,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:45,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:45,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:45,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:55:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:45,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:55:45,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:46,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:47,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536940238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:47,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:47,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-28 23:55:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646296011] [2023-11-28 23:55:47,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:47,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 23:55:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 23:55:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:55:47,764 INFO L87 Difference]: Start difference. First operand 11222 states and 13062 transitions. Second operand has 28 states, 28 states have (on average 9.928571428571429) internal successors, (278), 27 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:48,713 INFO L93 Difference]: Finished difference Result 20023 states and 23159 transitions. [2023-11-28 23:55:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:55:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 9.928571428571429) internal successors, (278), 27 states have internal predecessors, (278), 0 states have call successors, (0), 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 107 [2023-11-28 23:55:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:48,722 INFO L225 Difference]: With dead ends: 20023 [2023-11-28 23:55:48,722 INFO L226 Difference]: Without dead ends: 12719 [2023-11-28 23:55:48,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=448, Invalid=1274, Unknown=0, NotChecked=0, Total=1722 [2023-11-28 23:55:48,726 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 556 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:48,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 713 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:55:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12719 states. [2023-11-28 23:55:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12719 to 10831. [2023-11-28 23:55:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10831 states, 10830 states have (on average 1.1405355493998153) internal successors, (12352), 10830 states have internal predecessors, (12352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10831 states to 10831 states and 12352 transitions. [2023-11-28 23:55:48,818 INFO L78 Accepts]: Start accepts. Automaton has 10831 states and 12352 transitions. Word has length 107 [2023-11-28 23:55:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:48,818 INFO L495 AbstractCegarLoop]: Abstraction has 10831 states and 12352 transitions. [2023-11-28 23:55:48,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.928571428571429) internal successors, (278), 27 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10831 states and 12352 transitions. [2023-11-28 23:55:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-28 23:55:48,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:48,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:48,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 23:55:49,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 23:55:49,020 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:49,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash -96698874, now seen corresponding path program 1 times [2023-11-28 23:55:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:49,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957282252] [2023-11-28 23:55:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:49,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957282252] [2023-11-28 23:55:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957282252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720494304] [2023-11-28 23:55:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:49,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:49,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:55:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:49,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 23:55:49,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:50,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:55:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720494304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:55:51,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:55:51,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 35 [2023-11-28 23:55:51,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740724558] [2023-11-28 23:55:51,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:55:51,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 23:55:51,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 23:55:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 23:55:51,027 INFO L87 Difference]: Start difference. First operand 10831 states and 12352 transitions. Second operand has 35 states, 35 states have (on average 8.17142857142857) internal successors, (286), 35 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:55:53,832 INFO L93 Difference]: Finished difference Result 25462 states and 28732 transitions. [2023-11-28 23:55:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-28 23:55:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.17142857142857) internal successors, (286), 35 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-11-28 23:55:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:55:53,843 INFO L225 Difference]: With dead ends: 25462 [2023-11-28 23:55:53,843 INFO L226 Difference]: Without dead ends: 17904 [2023-11-28 23:55:53,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1388, Invalid=6984, Unknown=0, NotChecked=0, Total=8372 [2023-11-28 23:55:53,847 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1382 mSDsluCounter, 2582 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:55:53,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 2732 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:55:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2023-11-28 23:55:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 9302. [2023-11-28 23:55:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9302 states, 9301 states have (on average 1.1289108697989463) internal successors, (10500), 9301 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9302 states to 9302 states and 10500 transitions. [2023-11-28 23:55:53,945 INFO L78 Accepts]: Start accepts. Automaton has 9302 states and 10500 transitions. Word has length 108 [2023-11-28 23:55:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:55:53,945 INFO L495 AbstractCegarLoop]: Abstraction has 9302 states and 10500 transitions. [2023-11-28 23:55:53,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.17142857142857) internal successors, (286), 35 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9302 states and 10500 transitions. [2023-11-28 23:55:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-28 23:55:53,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:55:53,946 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:53,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 23:55:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 23:55:54,147 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:55:54,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 290340351, now seen corresponding path program 1 times [2023-11-28 23:55:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045133875] [2023-11-28 23:55:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:55,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045133875] [2023-11-28 23:55:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045133875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:55:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298274471] [2023-11-28 23:55:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:55:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:55,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:55:55,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:55:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:55,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-28 23:55:55,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:55:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:57,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:00,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298274471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:00,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:00,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 61 [2023-11-28 23:56:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063370239] [2023-11-28 23:56:00,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-28 23:56:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-28 23:56:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3326, Unknown=0, NotChecked=0, Total=3660 [2023-11-28 23:56:00,425 INFO L87 Difference]: Start difference. First operand 9302 states and 10500 transitions. Second operand has 61 states, 61 states have (on average 4.704918032786885) internal successors, (287), 61 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:15,182 INFO L93 Difference]: Finished difference Result 18094 states and 20240 transitions. [2023-11-28 23:56:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-28 23:56:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.704918032786885) internal successors, (287), 61 states have internal predecessors, (287), 0 states have call successors, (0), 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 108 [2023-11-28 23:56:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:15,190 INFO L225 Difference]: With dead ends: 18094 [2023-11-28 23:56:15,190 INFO L226 Difference]: Without dead ends: 16327 [2023-11-28 23:56:15,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8172 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2641, Invalid=23119, Unknown=0, NotChecked=0, Total=25760 [2023-11-28 23:56:15,193 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 2693 mSDsluCounter, 6267 mSDsCounter, 0 mSdLazyCounter, 3263 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:15,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2693 Valid, 6479 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3263 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-28 23:56:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16327 states. [2023-11-28 23:56:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16327 to 9969. [2023-11-28 23:56:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.1277086677367576) internal successors, (11241), 9968 states have internal predecessors, (11241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 11241 transitions. [2023-11-28 23:56:15,284 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 11241 transitions. Word has length 108 [2023-11-28 23:56:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:15,285 INFO L495 AbstractCegarLoop]: Abstraction has 9969 states and 11241 transitions. [2023-11-28 23:56:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.704918032786885) internal successors, (287), 61 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 11241 transitions. [2023-11-28 23:56:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-28 23:56:15,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:15,286 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:15,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 23:56:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 23:56:15,487 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:15,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1998571710, now seen corresponding path program 1 times [2023-11-28 23:56:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:15,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035152262] [2023-11-28 23:56:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035152262] [2023-11-28 23:56:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035152262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069604318] [2023-11-28 23:56:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:15,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:15,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:15,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:56:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:15,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:56:15,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:16,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 47 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069604318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:17,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:17,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 32 [2023-11-28 23:56:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794332328] [2023-11-28 23:56:17,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 23:56:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 23:56:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-11-28 23:56:17,194 INFO L87 Difference]: Start difference. First operand 9969 states and 11241 transitions. Second operand has 32 states, 32 states have (on average 8.5625) internal successors, (274), 32 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:19,578 INFO L93 Difference]: Finished difference Result 26633 states and 29959 transitions. [2023-11-28 23:56:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-28 23:56:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.5625) internal successors, (274), 32 states have internal predecessors, (274), 0 states have call successors, (0), 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 109 [2023-11-28 23:56:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:19,590 INFO L225 Difference]: With dead ends: 26633 [2023-11-28 23:56:19,590 INFO L226 Difference]: Without dead ends: 17731 [2023-11-28 23:56:19,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1324, Invalid=6158, Unknown=0, NotChecked=0, Total=7482 [2023-11-28 23:56:19,596 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1342 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:19,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 3347 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:56:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2023-11-28 23:56:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 11188. [2023-11-28 23:56:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11188 states, 11187 states have (on average 1.120139447573076) internal successors, (12531), 11187 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11188 states to 11188 states and 12531 transitions. [2023-11-28 23:56:19,713 INFO L78 Accepts]: Start accepts. Automaton has 11188 states and 12531 transitions. Word has length 109 [2023-11-28 23:56:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:19,713 INFO L495 AbstractCegarLoop]: Abstraction has 11188 states and 12531 transitions. [2023-11-28 23:56:19,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.5625) internal successors, (274), 32 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11188 states and 12531 transitions. [2023-11-28 23:56:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-28 23:56:19,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:19,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:19,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:19,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:19,916 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:19,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2136393555, now seen corresponding path program 1 times [2023-11-28 23:56:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083386081] [2023-11-28 23:56:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:20,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:20,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083386081] [2023-11-28 23:56:20,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083386081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:20,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513260852] [2023-11-28 23:56:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:20,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:20,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:20,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:56:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:20,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:56:20,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:21,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 47 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:21,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513260852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:21,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 32 [2023-11-28 23:56:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997782198] [2023-11-28 23:56:21,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 23:56:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 23:56:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-11-28 23:56:21,781 INFO L87 Difference]: Start difference. First operand 11188 states and 12531 transitions. Second operand has 32 states, 32 states have (on average 8.375) internal successors, (268), 32 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:24,228 INFO L93 Difference]: Finished difference Result 32759 states and 36839 transitions. [2023-11-28 23:56:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-28 23:56:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.375) internal successors, (268), 32 states have internal predecessors, (268), 0 states have call successors, (0), 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 109 [2023-11-28 23:56:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:24,244 INFO L225 Difference]: With dead ends: 32759 [2023-11-28 23:56:24,244 INFO L226 Difference]: Without dead ends: 22277 [2023-11-28 23:56:24,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1324, Invalid=6158, Unknown=0, NotChecked=0, Total=7482 [2023-11-28 23:56:24,251 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 1380 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 3618 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:24,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 3618 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:56:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22277 states. [2023-11-28 23:56:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22277 to 14510. [2023-11-28 23:56:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14510 states, 14509 states have (on average 1.1182714177407127) internal successors, (16225), 14509 states have internal predecessors, (16225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14510 states to 14510 states and 16225 transitions. [2023-11-28 23:56:24,400 INFO L78 Accepts]: Start accepts. Automaton has 14510 states and 16225 transitions. Word has length 109 [2023-11-28 23:56:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:24,400 INFO L495 AbstractCegarLoop]: Abstraction has 14510 states and 16225 transitions. [2023-11-28 23:56:24,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.375) internal successors, (268), 32 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14510 states and 16225 transitions. [2023-11-28 23:56:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-28 23:56:24,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:24,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:24,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:56:24,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:24,602 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:24,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:24,603 INFO L85 PathProgramCache]: Analyzing trace with hash 375944492, now seen corresponding path program 1 times [2023-11-28 23:56:24,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:24,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472893647] [2023-11-28 23:56:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:56:25,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472893647] [2023-11-28 23:56:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472893647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328128908] [2023-11-28 23:56:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:25,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:25,210 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:25,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:56:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:25,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:56:25,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:56:25,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:56:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328128908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:26,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:26,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 35 [2023-11-28 23:56:26,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876355243] [2023-11-28 23:56:26,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:26,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 23:56:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 23:56:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 23:56:26,498 INFO L87 Difference]: Start difference. First operand 14510 states and 16225 transitions. Second operand has 35 states, 35 states have (on average 7.628571428571429) internal successors, (267), 35 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:31,539 INFO L93 Difference]: Finished difference Result 36140 states and 40450 transitions. [2023-11-28 23:56:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-28 23:56:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 7.628571428571429) internal successors, (267), 35 states have internal predecessors, (267), 0 states have call successors, (0), 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 109 [2023-11-28 23:56:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:31,554 INFO L225 Difference]: With dead ends: 36140 [2023-11-28 23:56:31,554 INFO L226 Difference]: Without dead ends: 21802 [2023-11-28 23:56:31,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2193, Invalid=10917, Unknown=0, NotChecked=0, Total=13110 [2023-11-28 23:56:31,563 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1649 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 3499 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:31,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 3499 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:56:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21802 states. [2023-11-28 23:56:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21802 to 11794. [2023-11-28 23:56:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.1156618332909354) internal successors, (13157), 11793 states have internal predecessors, (13157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 13157 transitions. [2023-11-28 23:56:31,691 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 13157 transitions. Word has length 109 [2023-11-28 23:56:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:31,691 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 13157 transitions. [2023-11-28 23:56:31,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.628571428571429) internal successors, (267), 35 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 13157 transitions. [2023-11-28 23:56:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-28 23:56:31,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:31,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:31,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:56:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-28 23:56:31,893 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1789805715, now seen corresponding path program 1 times [2023-11-28 23:56:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:31,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944718578] [2023-11-28 23:56:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:33,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944718578] [2023-11-28 23:56:33,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944718578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537497641] [2023-11-28 23:56:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:33,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:33,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:33,331 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:33,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:56:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:33,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-28 23:56:33,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:36,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:39,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537497641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:39,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:39,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 22] total 66 [2023-11-28 23:56:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747795046] [2023-11-28 23:56:39,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-28 23:56:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-28 23:56:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=4045, Unknown=0, NotChecked=0, Total=4422 [2023-11-28 23:56:39,061 INFO L87 Difference]: Start difference. First operand 11794 states and 13157 transitions. Second operand has 67 states, 67 states have (on average 4.104477611940299) internal successors, (275), 66 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:58:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:20,735 INFO L93 Difference]: Finished difference Result 49225 states and 54518 transitions. [2023-11-28 23:58:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 503 states. [2023-11-28 23:58:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.104477611940299) internal successors, (275), 66 states have internal predecessors, (275), 0 states have call successors, (0), 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 110 [2023-11-28 23:58:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:20,770 INFO L225 Difference]: With dead ends: 49225 [2023-11-28 23:58:20,770 INFO L226 Difference]: Without dead ends: 40713 [2023-11-28 23:58:20,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139320 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=26954, Invalid=292836, Unknown=0, NotChecked=0, Total=319790 [2023-11-28 23:58:20,793 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 5939 mSDsluCounter, 15372 mSDsCounter, 0 mSdLazyCounter, 9881 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5939 SdHoareTripleChecker+Valid, 15787 SdHoareTripleChecker+Invalid, 9967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 9881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:20,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5939 Valid, 15787 Invalid, 9967 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 9881 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-11-28 23:58:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40713 states. [2023-11-28 23:58:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40713 to 14359. [2023-11-28 23:58:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14359 states, 14358 states have (on average 1.1138041509959604) internal successors, (15992), 14358 states have internal predecessors, (15992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:58:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14359 states to 14359 states and 15992 transitions. [2023-11-28 23:58:21,098 INFO L78 Accepts]: Start accepts. Automaton has 14359 states and 15992 transitions. Word has length 110 [2023-11-28 23:58:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:21,098 INFO L495 AbstractCegarLoop]: Abstraction has 14359 states and 15992 transitions. [2023-11-28 23:58:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.104477611940299) internal successors, (275), 66 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:58:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14359 states and 15992 transitions. [2023-11-28 23:58:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-28 23:58:21,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:21,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:21,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-28 23:58:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-28 23:58:21,301 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:21,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 767103893, now seen corresponding path program 1 times [2023-11-28 23:58:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:21,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965429610] [2023-11-28 23:58:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965429610] [2023-11-28 23:58:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965429610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49028958] [2023-11-28 23:58:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:23,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:23,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:23,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:23,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e09d283-89f4-463d-810d-cac1dd0c1d64/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:58:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:23,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-28 23:58:23,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 39 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:30,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49028958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:40,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:58:40,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34, 37] total 99 [2023-11-28 23:58:40,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502391250] [2023-11-28 23:58:40,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:40,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-28 23:58:40,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-28 23:58:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=8881, Unknown=0, NotChecked=0, Total=9900 [2023-11-28 23:58:40,133 INFO L87 Difference]: Start difference. First operand 14359 states and 15992 transitions. Second operand has 100 states, 100 states have (on average 3.14) internal successors, (314), 99 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)