./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU --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 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:19:32,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:19:32,661 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:19:32,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:19:32,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:19:32,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:19:32,710 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:19:32,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:19:32,711 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:19:32,712 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:19:32,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:19:32,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:19:32,715 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:19:32,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:19:32,718 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:19:32,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:19:32,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:19:32,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:19:32,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:19:32,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:19:32,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:19:32,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:19:32,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:19:32,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:19:32,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:19:32,726 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:19:32,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:19:32,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:19:32,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:19:32,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:19:32,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:19:32,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:19:32,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:32,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:19:32,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:19:32,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:19:32,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:19:32,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:19:32,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:19:32,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:19:32,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:19:32,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:19:32,732 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_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 [2024-10-31 22:19:33,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:19:33,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:19:33,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:19:33,084 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:19:33,086 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:19:33,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c Unable to find full path for "g++" [2024-10-31 22:19:35,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:19:35,322 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:19:35,323 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2024-10-31 22:19:35,336 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/data/ef20a85cb/979649405be4465290b989b2c7a2dc73/FLAGade034f27 [2024-10-31 22:19:35,357 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/data/ef20a85cb/979649405be4465290b989b2c7a2dc73 [2024-10-31 22:19:35,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:19:35,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:19:35,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:35,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:19:35,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:19:35,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c113cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35, skipping insertion in model container [2024-10-31 22:19:35,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:19:35,603 WARN L251 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_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2024-10-31 22:19:35,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:35,649 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:19:35,667 WARN L251 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_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2024-10-31 22:19:35,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:35,705 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:19:35,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35 WrapperNode [2024-10-31 22:19:35,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:35,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:35,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:19:35,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:19:35,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,748 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-10-31 22:19:35,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:35,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:19:35,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:19:35,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:19:35,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,783 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]. [2024-10-31 22:19:35,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:19:35,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:19:35,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:19:35,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:19:35,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (1/1) ... [2024-10-31 22:19:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:35,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:19:35,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:19:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:19:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 22:19:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 22:19:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:19:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:19:35,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:19:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:19:35,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:19:35,969 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:19:35,971 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:19:36,215 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 22:19:36,215 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:19:36,229 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:19:36,230 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:19:36,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:36 BoogieIcfgContainer [2024-10-31 22:19:36,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:19:36,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:19:36,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:19:36,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:19:36,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:19:35" (1/3) ... [2024-10-31 22:19:36,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f98d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:36, skipping insertion in model container [2024-10-31 22:19:36,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:35" (2/3) ... [2024-10-31 22:19:36,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f98d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:36, skipping insertion in model container [2024-10-31 22:19:36,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:36" (3/3) ... [2024-10-31 22:19:36,242 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2024-10-31 22:19:36,288 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:19:36,288 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:19:36,380 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:19:36,387 INFO L333 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, 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;@497306f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:19:36,388 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:19:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:19:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:19:36,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:36,402 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:36,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:36,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2024-10-31 22:19:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:36,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469851552] [2024-10-31 22:19:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:36,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:36,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:19:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:36,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:19:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:36,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:19:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:19:36,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:36,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469851552] [2024-10-31 22:19:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469851552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:36,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:36,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:19:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021055703] [2024-10-31 22:19:36,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:36,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:19:36,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:19:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:19:36,712 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:19:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:36,744 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2024-10-31 22:19:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:19:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-31 22:19:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:36,758 INFO L225 Difference]: With dead ends: 63 [2024-10-31 22:19:36,759 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 22:19:36,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:19:36,770 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:36,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:19:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 22:19:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-31 22:19:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:19:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-10-31 22:19:36,818 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2024-10-31 22:19:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:36,821 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-10-31 22:19:36,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:19:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-10-31 22:19:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:19:36,823 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:36,824 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:36,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:19:36,824 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:36,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2024-10-31 22:19:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518879923] [2024-10-31 22:19:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:19:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:19:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:19:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:19:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518879923] [2024-10-31 22:19:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518879923] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:37,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:19:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854480505] [2024-10-31 22:19:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:37,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:19:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:37,176 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:19:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:37,267 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-10-31 22:19:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:19:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-10-31 22:19:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:37,269 INFO L225 Difference]: With dead ends: 42 [2024-10-31 22:19:37,269 INFO L226 Difference]: Without dead ends: 40 [2024-10-31 22:19:37,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:19:37,271 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:37,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:19:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-31 22:19:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-10-31 22:19:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:19:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-10-31 22:19:37,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2024-10-31 22:19:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:37,291 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-10-31 22:19:37,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:19:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-10-31 22:19:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:19:37,293 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:37,294 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:37,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:19:37,294 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:37,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2024-10-31 22:19:37,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:37,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361774553] [2024-10-31 22:19:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:19:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:19:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:19:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 22:19:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:19:37,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:37,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361774553] [2024-10-31 22:19:37,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361774553] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:37,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:37,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:19:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843332175] [2024-10-31 22:19:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:37,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:19:37,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:37,921 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:19:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:38,090 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-10-31 22:19:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:19:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-31 22:19:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:38,092 INFO L225 Difference]: With dead ends: 46 [2024-10-31 22:19:38,092 INFO L226 Difference]: Without dead ends: 44 [2024-10-31 22:19:38,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:19:38,094 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:38,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-31 22:19:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-10-31 22:19:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:19:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-31 22:19:38,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2024-10-31 22:19:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:38,112 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-31 22:19:38,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:19:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-31 22:19:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 22:19:38,113 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:38,113 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:38,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:19:38,114 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:38,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2024-10-31 22:19:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:38,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624730614] [2024-10-31 22:19:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:38,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:19:38,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758147894] [2024-10-31 22:19:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:38,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:38,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:38,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:19:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:38,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:19:38,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:19:38,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:19:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:38,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624730614] [2024-10-31 22:19:38,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:19:38,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758147894] [2024-10-31 22:19:38,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758147894] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:38,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:38,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:19:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427902661] [2024-10-31 22:19:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:38,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:19:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:19:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:19:38,657 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:19:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:39,306 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-10-31 22:19:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:19:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-10-31 22:19:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:39,309 INFO L225 Difference]: With dead ends: 63 [2024-10-31 22:19:39,310 INFO L226 Difference]: Without dead ends: 50 [2024-10-31 22:19:39,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:19:39,313 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:39,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 169 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:19:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-31 22:19:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-31 22:19:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-31 22:19:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-10-31 22:19:39,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 34 [2024-10-31 22:19:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:39,343 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-10-31 22:19:39,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:19:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-10-31 22:19:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:19:39,347 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:39,347 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:39,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:39,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:39,552 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:39,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2024-10-31 22:19:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687693208] [2024-10-31 22:19:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:19:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676476959] [2024-10-31 22:19:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:39,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:39,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:39,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:19:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:39,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:19:39,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:19:40,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-31 22:19:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687693208] [2024-10-31 22:19:41,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:19:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676476959] [2024-10-31 22:19:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676476959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:41,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:19:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-10-31 22:19:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968982661] [2024-10-31 22:19:41,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:41,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:19:41,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:19:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:19:41,663 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-31 22:19:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:42,309 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-10-31 22:19:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:19:42,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2024-10-31 22:19:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:42,313 INFO L225 Difference]: With dead ends: 68 [2024-10-31 22:19:42,314 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 22:19:42,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:19:42,315 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:42,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:19:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 22:19:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-31 22:19:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:19:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-10-31 22:19:42,341 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 41 [2024-10-31 22:19:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:42,342 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-10-31 22:19:42,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-31 22:19:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-10-31 22:19:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:19:42,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:42,344 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:42,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:19:42,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:42,548 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:42,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2024-10-31 22:19:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:42,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150354154] [2024-10-31 22:19:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:19:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485001074] [2024-10-31 22:19:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:42,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:42,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:42,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:19:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:42,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 22:19:42,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-31 22:19:43,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-31 22:19:44,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150354154] [2024-10-31 22:19:44,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:19:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485001074] [2024-10-31 22:19:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485001074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:44,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:19:44,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2024-10-31 22:19:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973268250] [2024-10-31 22:19:44,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:44,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:19:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:19:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:19:44,004 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-31 22:19:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:46,018 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-10-31 22:19:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:19:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2024-10-31 22:19:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:46,021 INFO L225 Difference]: With dead ends: 87 [2024-10-31 22:19:46,021 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 22:19:46,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:19:46,022 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:46,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 235 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-31 22:19:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 22:19:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-10-31 22:19:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-31 22:19:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-10-31 22:19:46,046 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 51 [2024-10-31 22:19:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:46,046 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-10-31 22:19:46,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-31 22:19:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-10-31 22:19:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-31 22:19:46,048 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:46,049 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2024-10-31 22:19:46,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:46,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:19:46,253 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:46,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2024-10-31 22:19:46,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977349894] [2024-10-31 22:19:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:19:46,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592082991] [2024-10-31 22:19:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:46,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:46,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:46,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:46,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5d8d2a7-8a86-4908-923f-f3bdd760fda1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:19:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:46,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-31 22:19:46,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 43 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-31 22:19:48,329 INFO L311 TraceCheckSpWp]: Computing backward predicates...